TWI661690B - Control method and control module for multiple-antenna device - Google Patents

Abstract

A control method of a multi-antenna device includes: sending a wireless signal from a wireless transmitting device to a plurality of antennas of the multi-antenna device, the antennas transmitting the received wireless signal to a wireless chip through a signal-to-noise ratio controller of a performance optimization unit; The chip obtains the received signal strength indication corresponding to each antenna and transmits the received signal strength indication of each antenna to the application program; when the difference between the received signal strength indications corresponding to the antennas is greater than or equal to the first threshold value Select the antenna with the maximum received signal strength indication as the designated receiving antenna; otherwise, the signal-to-noise ratio controller increases the signal-to-noise ratio of the wireless signals received by the antennas, and then the application program obtains The receiving data rate of one antenna, and then select the antenna with the maximum receiving data rate as the designated receiving antenna, thereby improving the receiving data rate of the multi-antenna device.

Description

Control method and module of multi-antenna device

The present invention relates to a wireless transmission technology, and in particular to a control method and module of a multi-antenna device capable of improving wireless transmission efficiency.

The creation of wireless networks and mobile communication equipment with high-speed transmission capabilities has always been the goal of related industries. The evolution of various wireless transmission standards has continued to improve data transmission rates (referred to as data rates, or data rates, for example). In the IEEE 802.11 standard of the wireless local area network (WLAN), the maximum original data transmission rate of the early 802.11a standard is 54 Mbps, and the 802.11ac standard that has been widely used has increased the single channel rate to at least 500 Mbps. In terms of mobile communications, the popular 5th generation communication system (5G) standard in the future will define the required target of an amazing data transmission rate of 1Gbps.

However, the formulation of wireless transmission standards not only requires digital chips with sufficient computing and processing capabilities to perform signal encoding and decoding, but also requires correspondingly enhanced RF circuits to cooperate with antennas (or antenna systems) with sufficient bandwidth and high efficiency. In fact, the upper limit of the actual data transmission rate of wireless products provided by wireless product suppliers is not only limited by the respective performance limitations of various RF components, analog modules and digital modules, but also a large part of the reasons are limited. The integration of all components and module hardware in software algorithms. Traditionally, in the process of wireless transmission, the increase of wireless data transmission rate The increase or decrease is mainly determined by the control and channel state (external transmission environment) of the wireless chip, and the RF element and the antenna element are in a passive position without any control. From the perspective of wireless chips alone, there are still many limitations to finding solutions to improve data transmission rates.

An embodiment of the present invention provides a method for controlling a multi-antenna device for wirelessly transmitting data between a wireless transmitting device and a multi-antenna device. The method includes: sending a wireless signal from the wireless transmitting device to a plurality of antennas of the multi-antenna device, The plurality of antennas transmit the received wireless signal to a wireless chip of the multiple antenna device through a signal-to-noise ratio controller of a performance optimization unit of the multiple antenna device; the wireless chip obtains a received signal strength indicator (RSSI) corresponding to each antenna, And transmitting the received signal strength indication of each antenna to the application program of the performance optimization unit; the performance optimization unit judges the difference of the plurality of received signal strength indicators corresponding to the plurality of antennas; when the plurality of antennas corresponds to the plurality of antennas, When the difference between the received signal strength indications is greater than or equal to the first threshold, the performance optimization unit controls the wireless chip to select the antenna with the maximum received signal strength indication as the designated receiving antenna; when the plurality of antennas correspond to the plurality of receptions, When the difference in signal strength indication is less than the first threshold The performance optimization unit controls the signal-to-noise ratio controller to increase the signal-to-noise ratio of the wireless signals received by the plurality of antennas, and then the wireless chip sequentially selects one of the plurality of antennas to receive the wireless signals of the wireless transmission device. , And obtain the received data rate corresponding to each antenna, and transmit the received data rate of each antenna to the application program. The performance optimization unit controls the wireless chip to select the antenna with the maximum received data rate as the designated receiving antenna.

An embodiment of the present invention provides a control module for a multi-antenna device. To be installed in a multi-antenna device, the control module includes a plurality of antennas and a performance optimization unit. The plurality of antennas are used to receive wireless signals from the wireless transmitting device. The performance optimization unit includes a microprocessor, a signal-to-noise ratio controller, and an application program. The signal-to-noise ratio controller is connected to the microprocessor, and is connected between the plurality of antennas and the wireless chip. The plurality of antennas transmit the received wireless signals to the wireless chip of the multi-antenna device through the signal-to-noise ratio controller. The application program uses a microprocessor to control the signal-to-noise ratio controller, wherein the wireless chip obtains a received signal strength indicator (RSSI) corresponding to each antenna, and transmits the received signal strength indicator of each antenna to the application program; where, when When the difference between the plurality of received signal strength indicators corresponding to the plurality of antennas is greater than or equal to the first threshold value, the performance optimization unit controls the wireless chip to select the antenna with the maximum received signal strength indicator as the designated receiving antenna; where, when When the difference between the plurality of received signal strength indications corresponding to the plurality of antennas is less than a first threshold value, the performance optimization unit controls the signal-to-noise ratio controller to increase the signal-to-noise ratio of the wireless signals received by the plurality of antennas, and then The wireless chip sequentially selects one of the plurality of antennas to receive the wireless signal of the wireless transmitting device, obtains the received data rate corresponding to each antenna, and transmits the received data rate of each antenna to the application, The performance optimization unit controls the wireless chip to select the antenna with the maximum received data rate Specified receiving antenna.

In summary, the embodiments of the present invention provide a control method and module for a multi-antenna device, which uses a multi-antenna system algorithm implemented by a performance optimization unit outside a wireless chip to replace the traditional method of analyzing signal strength based on wireless chips only. , Greatly improving the help of the multi-antenna device to improve the data rate of the received wireless signal. In addition, when the received signal strength indications of the antennas are not significantly different, an optimal receiving antenna can still be obtained. Thereby, the wireless received by the multi-antenna device can be dynamically improved Data rate of the packet.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and accompanying drawings of the present invention, but these descriptions and attached drawings are only used to illustrate the present invention, not the rights to the present invention. No limitation on scope.

S110, S120, S130, S140, S150, S160, S170, S171, S180, S191, S192, S193‧‧‧ steps

△ RSSI‧‧‧Signal signal strength difference

TH1‧‧‧ first threshold

TH2‧‧‧Second threshold

100‧‧‧Multi-antenna device

1‧‧‧control module

200‧‧‧ wireless transmission device

11a, 11b ..., 11n‧‧‧ antenna

12‧‧‧Performance Optimization Unit

13‧‧‧Wireless chip

121‧‧‧Signal to Clutter Controller

122‧‧‧Microprocessor

123‧‧‧Application layer

123a‧‧‧App

124‧‧‧antenna control circuit board

FIG. 1 is a flowchart of a method for controlling a multi-antenna device according to an embodiment of the present invention.

FIG. 2 is a flowchart of a method for controlling a multi-antenna device according to another embodiment of the present invention.

3 is a block diagram of a multi-antenna control device and a control module of the multi-antenna device according to an embodiment of the present invention.

The embodiments of the present invention are not limited to the types of wireless standards used for wireless transmission between the multi-antenna device and the wireless transmission device. For example, they can be applied to the IEEE 802.11 standard, or the long-term evolution technology standard (LTE), or the fifth standard in the future. Generation Mobile Communications Standard (5G). The wireless transmission device and the multi-antenna device mentioned in the embodiments of the present invention have various implementations according to the application situation. The wireless transmission device and the multi-antenna device may be the same wireless device or different wireless devices. Wireless transmission devices such as, but not limited to, laptops, laptops, tablets, all-in-one computers, smart TVs, small base stations, wireless routers, or smartphones, and multi-antenna devices such as, but not limited to, notebook computers, laptops, and laptops PC, tablet, one Computer, smart TV, small base station, wireless router, or smartphone.

Please refer to FIG. 1, which is a flowchart of a method for controlling a multi-antenna device according to an embodiment of the present invention. The control method of the multi-antenna device is used for wirelessly transmitting data between the wireless transmitting device and the multi-antenna device. In this embodiment, the multi-antenna device is used as a receiver and the wireless transmitting device is used as a transmitter, but it is actually applied to the product. Multi-antenna devices usually also have wireless transmission capabilities, that is, multi-antenna devices have multiple antennas responsible for transmitting and receiving wireless signals, and also have wireless chips (including radio frequency transceivers, analog-to-digital converters, digital-to-analog converters, and digital signal processors). And so on to achieve the relevant demodulation, modulation, encoding, and decoding functions of wireless signals). Moreover, the multi-antenna device has a performance optimization unit independent of the wireless chip. The control method of the multi-antenna device of this embodiment may be implemented, for example, by using the multi-antenna control device and the control module of the multi-antenna device described in the subsequent embodiment of FIG. 3. The control method of the multi-antenna device of this embodiment includes the following steps. First, in step S110, a wireless transmission device sends a wireless signal to a plurality of antennas of a multi-antenna device, and the plurality of antennas transmits the received wireless signal to the multiple antennas through a signal-to-noise ratio controller of a performance optimization unit of the multi-antenna device. The wireless chip of the device, the performance optimization unit of the multiple antenna device and its components will be described in detail in the embodiment of FIG. 3. Then, in step S120, the wireless chip obtains a received signal strength indication (RSSI) corresponding to each antenna, and transmits the received signal strength indication of each antenna to the application program of the performance optimization unit. Next, in step S130, the performance optimization unit judges the differences ΔRSSI of the plurality of received signal strength indicators corresponding to the plurality of antennas. When the difference ΔRSSI of the plurality of received signal strength indications corresponding to the plurality of antennas is greater than or equal to the first threshold value TH1, step S140 is performed, and the performance optimization unit controls the wireless chip to select the antenna having the maximum received signal strength indication As the designated receiving antenna. When the plural When the differences ΔRSSI of the plurality of received signal strength indications corresponding to the antennas are less than the first threshold value TH1, steps S150, S160, and S170 are performed. In step S150, the performance optimization unit controls the signal-to-noise ratio controller to increase the signal-to-noise ratio of the wireless signals received by the plurality of antennas. Preferably, the signal-to-noise ratio controller removes signals outside the wireless channel frequency band according to the wireless channel frequency band selected by the wireless chip, and transmits wireless signals within the wireless channel frequency band to the wireless chip.

After step S150, step S160 is performed. The wireless chip sequentially selects one of the plurality of antennas to receive the wireless signal of the wireless transmission device, and obtains the receiving data rate corresponding to each antenna. The received data rate is transmitted to the application. Then, in step S170, the performance optimization unit controls the wireless chip to select the antenna with the maximum received data rate as the designated receive antenna.

Based on the embodiment of FIG. 1, another embodiment will be described below, please refer to FIG. 2. Steps S110 to S160 in the flow of FIG. 2 are the same as those of FIG. 1, and after step S160, that is, after obtaining the data rate corresponding to each antenna, step S170 and step S171 are performed, and step S170 is as before In step S171, the performance optimization unit selects the antenna corresponding to the received data rate with the next highest value as the standby receiving antenna. After steps S170 and S171 are completed, step S180 is performed. After a set time, it is determined whether the difference (ΔRSSI) between the received signal strength indicator corresponding to the designated receiving antenna and the received signal strength indicator corresponding to the standby receiving antenna is less than Threshold TH2. When the difference between the received signal strength indicator corresponding to the designated receiving antenna and the received signal strength indicator corresponding to the standby receiving antenna (ΔRSSI) is less than the second threshold value TH2, step S191 is performed, and the performance optimization unit uses the specified The receiving antenna receives the wireless signal from the wireless transmitting device, and At least one test interval is inserted in the transmission period, and a standby receiving antenna is used instead of the designated receiving antenna to receive the wireless signal from the wireless transmitting device in the test interval. The length of the test interval is shorter than the transmission period. In addition, the length of the test interval is not greater than one unhindered test time. After step S191, step S193 is performed, and the performance optimization unit judges whether the received data rate in the test interval is greater than the received data rate in the transmission cycle, and when the received data rate in the test interval is greater than the received data in the transmission cycle The efficiency optimization unit designates the standby receiving antenna as the updated designated receiving antenna. Relative to step S191, when the difference between the received signal strength indicator corresponding to the designated receiving antenna and the received signal strength indicator corresponding to the standby receiving antenna (ΔRSSI) is greater than or equal to the second threshold value TH2, step S192 is performed. The performance optimization unit The antenna with the maximum received signal strength indication is selected as the designated receiving antenna.

Referring again to FIG. 2, the test interval, transmission period, and unimpeded test time in step S191 are described next. First of all, regarding the transmission period, because it is used as the time period for normal transmission with the previously specified designated receiving antenna before correcting (or updating) the best receiving antenna (designated receiving antenna), so that the length of the test interval Compared with normal transmission, the transmission period should be much shorter. The test time is the upper limit that the test interval can allow in terms of time length. The test time can be preset and fixed, for example, 10 milliseconds (ms ), 20 milliseconds (ms), or a program variable. In one embodiment, the performance optimization unit may, for example, determine the test time without affecting the traffic conditions of the wireless packets received by the multi-antenna device. For example, when the traffic condition is a peak traffic, the test time may be reduced, because the test interval during which the test is performed (allowing the standby receiving antenna to receive packets) may cause the received data rate to be significantly reduced instantly (but not necessarily, it is necessary to Real machine Determined by the overall performance of the operation), but can be increased when the traffic is small without affecting the overall situation of the received data rate. As an example, according to standards such as 802.11a / b / g / n / ac applied to wireless local area networks (WLAN), as the traffic conditions change, the test time is preferably between 5 milliseconds (ms) In the range of 50 milliseconds (ms), the length of the test interval is shorter than or equal to this upper limit value (the upper limit value is 5 milliseconds to 50 milliseconds). In actual application, according to the communication standards and protocols used, the ratio of the test interval used to perform the test compared to the transmission period used for normal transmission is adjustable (not necessarily fixed). In this embodiment, only a short switching interval (that is, a test interval segment) is needed to obtain a change value of the data rate as an optimization basis.

Please refer to FIG. 3, which is a block diagram of a multi-antenna control device and a control module of the multi-antenna device according to an embodiment of the present invention. The control module 1 is configured to be installed in the multi-antenna device 100. The control module 1 includes a plurality of antennas 11 a, 11 b..., 11 n and a performance optimization unit 12. The plurality of antennas 11a, 11b ..., 11n are used to receive wireless signals from the wireless transmitting device 200. The performance optimization unit 12 includes a microprocessor 121, a signal-to-noise ratio controller 122, and an application program 123a. The signal-to-noise ratio controller 122 is connected to the microprocessor 121 and is connected between the plurality of antennas 11a, 11b ..., 11n and the wireless chip 101. The plurality of antennas 11a, 11b ..., 11n pass through the signal. The clutter controller 122 transmits the received wireless signal to the wireless chip 101 of the multi-antenna device 100. The application program 123a controls the signal-to-noise ratio controller 122 through the microprocessor 121. The wireless chip 101 obtains a received signal strength indicator (RSSI) corresponding to each antenna, and transmits the received signal strength indicator of each antenna to the application program. 123a. When the difference (ΔRSSI) of the received signal strength indications corresponding to the plurality of antennas 11a, 11b ..., 11n is greater than or equal to the first threshold value TH1, the performance optimization unit 12 controls the wireless chip 101 The antenna with the maximum received signal strength indication is selected as the designated receiving antenna. When the difference (ΔRSSI) of the received signal strength indications corresponding to the plurality of antennas 11a, 11b ..., 11n is smaller than the first threshold value TH1, the performance optimization unit 12 controls the signal-to-noise ratio controller 122 to increase the The signal-to-noise ratio of the wireless signals received by the plurality of antennas 11a, 11b ..., 11n is described. Preferably, the signal-to-noise ratio controller 122 removes the wireless channel frequency band according to the wireless channel frequency band selected by the wireless chip. And transmits the wireless signals within the wireless channel frequency band to the wireless chip. In actual application, the application program 123a obtains the wireless channel band selected by the wireless chip 101 from the wireless chip 101, and the application program 123a notifies the signal-to-noise ratio controller 122 to remove signals outside the wireless channel band, and The wireless signal is transmitted to the wireless chip 101. Or, the wireless chip 101 does not pass the application program 123a, but directly informs the signal-to-noise ratio controller 122 of the wireless channel band currently selected by the wireless chip 101, so that the signal-to-noise ratio controller 122 removes signals outside the wireless channel band, and The wireless signal within the wireless channel frequency band is transmitted to the wireless chip 101.

The signal-to-noise ratio controller 122 is preferably a bipolar filter, a filter bank, an RLC circuit, or a π-type filter, but the present invention is not limited thereto. Then, the wireless chip 101 sequentially selects one of the plurality of antennas 11a, 11b, ..., 11n to receive a wireless signal of the wireless transmission device 200, and obtains a signal corresponding to each antenna 11a, 11b ... or 11n receive data rate, and transmit the receive data rate of each antenna 11a, 11b ... or 11n to the application 123a, the performance optimization unit 12 controls the wireless chip 101 to select the antenna 11a, 11b with the maximum receive data rate ... or 11n as the designated receiving antenna.

In more detail, after obtaining the reception data rate corresponding to each antenna, the performance optimization unit 12 not only controls the wireless chip 101 to select the antenna 11a, 11b ... or 11n having the maximum reception data rate as the designated reception antenna, Performance optimization The unit 12 also selects the antenna 11a, 11b ... or 11n corresponding to the received data rate with the next largest value as the standby receiving antenna; then, after a set time, the performance optimization unit 12 determines the received signal corresponding to the designated receiving antenna Whether the difference between the strength indicator and the received signal strength indicator (△ RSSI) corresponding to the standby receiving antenna is less than the second threshold TH2; when the received signal strength indicator corresponding to the designated receiving antenna and the received signal strength indicator corresponding to the standby receiving antenna When the difference (△ RSSI) is greater than or equal to the second threshold TH2, the performance optimization unit 12 selects the antenna with the maximum received signal strength indicator as the designated receiving antenna; when the received signal strength indicator corresponding to the designated receiving antenna and the standby receiving antenna are on standby When the corresponding difference (△ RSSI) of the received signal strength indication is less than the second threshold value TH2, the performance optimization unit 12 receives the wireless signal from the wireless transmission device 200 with a designated receiving antenna within a transmission period, and Insert at least one test interval and use standby reception in the test interval The line replaces the designated receiving antenna to receive the wireless signal from the wireless transmitting device 200. The length of the test interval is shorter than the transmission period, and the length of the test interval is not greater than one unimpeded test time. Among them, the performance optimization unit 12 judges Whether the received data rate in the test interval is greater than the received data rate in the transmission cycle, and when the received data rate in the test interval is greater than the received data rate in the transmission cycle, the performance optimization unit 12 designates the standby receiving antenna as For a detailed description of the updated designated receiving antenna, refer to the description of steps S170, S171, S180, S191, S192, and S193 in the flowchart of FIG. 2.

In the embodiment of FIG. 3, the microprocessor 121 and the signal-to-noise ratio controller 122 are disposed on the antenna control circuit board 124. That is, the antenna control circuit board 124 carrying the microprocessor 121 and the signal-to-noise ratio controller 122 can be installed in the multi-antenna device 100 in a modular manner and used as antennas 11a, 11b ..., 11n and Intermediary of the wireless chip 101. The application program 123a of the performance optimization unit 12 may be stored in the firmware and executed in the application layer 123 of the operating system of the multi-antenna device 100, or may be installed in the operating system of the multi-antenna device 100 as a plug-in or driver. . As far as product applications are concerned, the antenna control circuit board 124 with the microprocessor 121 and the antenna controller 122 is preferably a modular setting to be universally installed in a multi-antenna device of various models without being limited to the application model So that the wireless chip 101 does not need to be modified for different multi-antenna application requirements. It simply saves the high cost of changing the specifications of the wireless chip 101, and sets the antenna control rights (microprocessing) outside the wireless chip 101. The device 121 and the application program 123a) provide greater design flexibility when the antenna design needs to be changed, conveniently change the control method of the antenna, and can also address the needs of the antenna design end at a lower cost. In addition, the application program 123a can also obtain the control status of the antennas 11a, 11b ..., 11n by the microprocessor 121 from the microprocessor 121, for example, a developer or a user of the multi-antenna device 100 Monitor the antenna selection and operating mode.

In addition, compared with the embodiment of FIG. 3, the control module 1 stores the application program 123a of the performance optimization unit 12 therein. In another embodiment, if the multi-antenna device 100 is an external terminal (or monitoring device) During control, the application program 123a of the performance optimization unit 12 may be stored in an application layer of an external terminal (or monitoring device), and the multi-antenna control module 1 of the multi-antenna device 100 may be controlled by software monitoring.

Furthermore, in yet another embodiment, referring to the method of the embodiment of FIG. 1, the performance optimization unit 12 may determine the test time without interference according to the traffic conditions of the wireless packets received by the multi-antenna device 100. In another embodiment, when the received data rate in the test interval is lower than the unobstructed threshold, the performance optimization unit 12 shortens the unimpeded test time, or when the received data rate in the test interval is lower than the received data in the transmission period. When the difference between the material rates exceeds a difference threshold (not shown in the figure), the performance optimization unit 12 shortens the unimpeded test time.

In summary, a control method and module for a multi-antenna device provided by the embodiments of the present invention can replace the traditional method of analyzing signal strength based on wireless chips only, and the received signal strength indication difference (ΔRSSI) of the antenna is not large. , You can still get the best receiving antenna. In addition, without impeding the efficiency of the original normal transmission of data (wireless packets), at least one working interval (test interval section) of the standby receiving antenna is inserted during the transmission of data (wireless packets) in an attempt to determine the readout compared to The designated receiving antenna currently set is a better receiving antenna. Therefore, under the condition that it is not necessary to accommodate various complicated specifications of wireless communication standards and communication protocols one by one, the effect of dynamically improving the data receiving rate of wireless packets can be achieved for various multi-antenna devices at a relatively low cost.

The above description is only an embodiment of the present invention, and is not intended to limit the patent scope of the present invention.

Claims (8)

A control method of a multi-antenna device is used for wirelessly transmitting data between a wireless transmitting device and the multi-antenna device. The method includes: transmitting wireless signals by the wireless transmitting device to a plurality of antennas of the multi-antenna device, the method comprising: The antennas transmit the received wireless signals to a wireless chip of the multi-antenna device through a signal-to-noise ratio controller of a performance optimization unit of the multi-antenna device; the wireless chip obtains a received signal corresponding to each of the antennas Strength indication (RSSI) and transmitting the received signal strength indication of each antenna to an application of the performance optimization unit; the performance optimization unit judges the difference of the received signal strength indications corresponding to the antennas; when When the difference between the received signal strength indicators corresponding to the antennas is greater than or equal to a first threshold, the performance optimization unit controls the wireless chip to select the antenna having the maximum received signal strength indicator as a designated receiving antenna. ; When the difference between the received signal strength indications corresponding to the antennas is less than the first threshold The performance optimization unit controls the signal-to-noise ratio controller to increase the signal-to-noise ratio of the wireless signals received by the antennas, and then the wireless chip sequentially selects one of the antennas to receive the wireless signals of the wireless transmitting device. And obtain a received data rate corresponding to each of the antennas, and transmit the received data rate of each of the antennas to the application program, the performance optimization unit controls the wireless chip to select the received data rate with the maximum value The antenna is used as the designated receiving antenna; after the step of obtaining the received data rate corresponding to each of the antennas, the performance optimization unit selects the antenna corresponding to the received data rate having the second largest value as a standby receiving antenna; After a set time, determine whether the difference between the received signal strength indicator corresponding to the designated receiving antenna and the received signal strength indicator corresponding to the standby receiving antenna is less than a second threshold value; when the designated receiving antenna corresponds to The difference between the received signal strength indication and the received signal strength indication corresponding to the standby receiving antenna When it is less than the second threshold value, the performance optimization unit receives the wireless signal from the wireless transmitting device with the designated receiving antenna within a transmission period, and inserts at least one test interval segment in the transmission period, and The test interval uses the standby receiving antenna instead of the designated receiving antenna to receive wireless signals from the wireless transmitting device, wherein the time length of the test interval is shorter than the transmission period, and the time length of the test interval is not greater than none Hinder the test time; and the performance optimization unit judges whether the received data rate in the test interval is greater than the received data rate in the transmission cycle, and when the received data rate in the test interval is greater than in the transmission cycle When the received data rate is within the range, the performance optimization unit designates the standby receiving antenna as the updated receiving antenna. The method for controlling a multi-antenna device according to claim 1, wherein the signal-to-noise ratio controller removes signals outside the wireless channel band according to a wireless channel band selected by the wireless chip, and the wireless channel Wireless signals within the frequency band are transmitted to the wireless chip. The method for controlling a multi-antenna device according to claim 1, wherein after the set time, when the received signal strength indicator corresponding to the designated receiving antenna indicates the received signal strength indicator corresponding to the standby receiving antenna, When the difference is greater than or equal to the second threshold, the performance optimization unit selects the antenna having the maximum received signal strength indication as the designated receiving antenna. A control module for a multi-antenna device is installed in the multi-antenna device. The control module includes: a plurality of antennas for receiving wireless signals from a wireless transmission device; and a performance optimization unit including: a A microprocessor; a signal-to-noise ratio controller connected to the microprocessor and connected between the antennas and a wireless chip, the antennas transmitting the received wireless signals to the multi-channel through the signal-to-noise ratio controller The wireless chip of the antenna device; and an application program for controlling the signal-to-noise ratio controller through the microprocessor, wherein the wireless chip obtains a received signal strength indicator (RSSI) corresponding to each antenna, and The received signal strength indication of one antenna is transmitted to the application; wherein, when the difference between the received signal strength indications corresponding to the antennas is greater than or equal to a first threshold value, the performance optimization unit controls the wireless chip The antenna having the maximum received signal strength indication is selected as a designated receiving antenna; wherein when the receiving signals corresponding to the antennas are When the difference in the strength indication is less than the first threshold, the performance optimization unit controls the signal-to-noise ratio controller to increase the signal-to-noise ratio of the wireless signals received by the antennas, and then the wireless chip sequentially selects the antennas. One of them is to receive the wireless signal of the wireless transmitting device, obtain a received data rate corresponding to each of the antennas, and transmit the received data rate of each of the antennas to the application program, and the performance optimization unit controls the The wireless chip selects the antenna having the maximum received data rate as the designated receiving antenna; wherein after obtaining the received data rate corresponding to each of the antennas, the performance optimization unit selects the received data rate having a second largest value The corresponding antenna is used as a standby receiving antenna; then, after a set time, the performance optimization unit judges the received signal strength indicator corresponding to the designated receiving antenna and the received signal strength indicator corresponding to the standby receiving antenna. Whether the difference is less than a second threshold value; when the received signal corresponding to the designated receiving antenna is strong When the difference between the indication of the received signal strength indicated by the standby receiving antenna is greater than or equal to the second threshold value, the performance optimization unit selects the antenna having the received signal strength indication having the maximum value as the designated receiving antenna; when When the difference between the received signal strength indicator corresponding to the designated receive antenna and the received signal strength indicator corresponding to the standby receive antenna is less than the second threshold value, the performance optimization unit receives the designated receive antenna within a transmission cycle. Wireless signals from the wireless transmitting device, and at least one test interval is inserted in the transmission period, and the standby receiving antenna is used instead of the designated receiving antenna to receive the wireless signals from the wireless transmitting device in the testing interval. , Wherein the time length of the test interval is shorter than the transmission period, and the time length of the test interval is not greater than one that does not hinder the test time; wherein the performance optimization unit determines whether the received data rate in the test interval is greater than The received data rate during the transmission period, and when in the test area When the received data rate of the interval is greater than the received data rate in the transmission period, the performance optimization unit designates the standby receiving antenna as the updated specified receiving antenna. The control module of the multi-antenna device according to item 4 of the claim, wherein the signal-to-noise ratio controller removes signals outside the wireless channel band according to a wireless channel band selected by the wireless chip, and Wireless signals within the channel band are transmitted to the wireless chip. The control module of the multi-antenna device according to claim 4, wherein the microprocessor and the signal-to-noise ratio controller are disposed on an antenna control circuit board, and the application program is executed on an operating system of the multi-antenna device. An application layer. The control module of the multi-antenna device according to claim 4, wherein the signal-to-noise ratio controller is a bipolar filter, a filter bank, an RLC circuit, or a π-type filter. The control module of a multi-antenna device according to item 4 of the claim, wherein the multi-antenna device is a notebook computer, a laptop computer, a tablet computer, an all-in-one computer, a smart TV, a small base station, a wireless router, or a smart phone .