CN111600346A - Ripple wave eliminating device of power supply of communication system - Google Patents

Abstract

The invention discloses a ripple elimination device for a power supply of a communication system. The device includes a control module and a virtual load module; the control module is used to acquire and record the current communication power of the communication system, according to a preset power- The load comparison table obtains the current virtual load corresponding to the current communication power, and generates a corresponding load control signal according to the current virtual load and sends it to the virtual load module; the virtual load module is used for receiving the received The load control signal adjusts the size of the dummy load, so as to perform load compensation on the power supply of the communication system according to the adjusted dummy load. By adopting the technical scheme of the present invention, the dynamic ripple of the power supply of the communication system can be eliminated, and the quality of the radio frequency signal and the data throughput can be improved.

Description

A ripple elimination device for a power supply of a communication system

technical field

The present invention relates to the technical field of wireless communication, and in particular, to a device for eliminating ripples of a power supply of a communication system.

Background technique

Communication systems generally use switching power supplies for power supply. When the communication system sends RF signals, the load of the switching power supply is relatively large. When the communication system receives RF signals, the load of the switching power supply is small. In the actual communication process, due to the radio frequency of the communication system. Signal transmission and reception are carried out alternately, causing the load of the switching power supply to be in a state of constant size change. In the process of dynamically adjusting the load, the following two problems are prone to occur: (1) The dynamic ripple is large, which affects the quality of the RF signal; (2) The dynamic response is not timely, which affects the throughput of the transmitted data.

In view of the above problems, the existing technology generally optimizes the dynamic response capability of the switching power supply by debugging the input and output circuits and feedback loops of the switching power supply, or places large capacitors near the high-power devices (such as radio frequency PA) of the communication system to optimize the switching power supply. The fluctuation of the voltage during the transient change of the current can reduce the dynamic ripple to a certain extent.

However, the technical solutions provided by the prior art can only optimize and alleviate the dynamic ripple of the switching power supply to a certain extent, and do not eliminate the dynamic ripple in a real sense.

SUMMARY OF THE INVENTION

The technical problem to be solved by the embodiments of the present invention is to provide a device for eliminating the ripple of the power supply of the communication system, which can eliminate the dynamic ripple of the power supply of the communication system and improve the quality of the radio frequency signal and the data throughput.

In order to solve the above technical problem, an embodiment of the present invention provides a device for eliminating ripple of a power supply of a communication system, the device including a control module and a virtual load module;

The control module is used to obtain and record the current communication power of the communication system, obtain the current virtual load corresponding to the current communication power according to a preset power-load comparison table, and generate corresponding load control according to the current virtual load sending a signal to the dummy load module;

The dummy load module is configured to adjust the size of the dummy load according to the received load control signal, so as to perform load compensation on the power supply of the communication system according to the adjusted dummy load.

Further, the control module is specifically configured to obtain the power-load comparison table in advance through the following steps:

Acquire a number of power consumptions corresponding to the communication system under a number of transmit powers;

Acquiring several actual loads corresponding to the several power consumptions according to the several power consumptions and the circuit parameters of the power supply;

The power-load comparison table is obtained according to the number of transmit powers, the number of power consumptions, and the number of actual loads; wherein, the transmit power, power consumption, and actual load in the power-load comparison table have One-to-one correspondence.

Further, the control module is specifically configured to obtain the current virtual load through the following steps:

Determine whether the current communication power is transmit power;

When the current communication power is the transmit power, determining that the current virtual load is zero;

When the current communication power is not the transmit power, obtain the last recorded transmit power, obtain the actual load corresponding to the last recorded transmit power according to the power-load comparison table, and determine the Current dummy load.

Further, the virtual load module includes at least a resistance unit;

The virtual load module is specifically configured to adjust the resistance value of the resistance unit according to the load control signal, so as to perform load compensation on the power supply according to the adjusted resistance unit.

Compared with the prior art, an embodiment of the present invention provides a device for eliminating ripple of a power supply of a communication system, the device includes a control module and a virtual load module, the control module is used to acquire and record the current communication power of the communication system, Obtain the current virtual load corresponding to the current communication power according to the preset power-load comparison table, and generate a corresponding load control signal according to the current virtual load and send it to the virtual load module; the virtual load module is used to adjust according to the received load control signal. The size of the dummy load is used to perform load compensation on the power supply of the communication system according to the adjusted dummy load. The device can eliminate the dynamic ripple of the power supply of the communication system and improve the quality of radio frequency signals and data throughput.

Description of drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of a device for eliminating ripples in a power supply of a communication system provided by the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

An embodiment of the present invention provides a device for eliminating ripple in a power supply of a communication system. Referring to FIG. 1 , it is a schematic structural diagram of a preferred embodiment of the device for eliminating ripple in a power supply in a communication system provided by the present invention. , the device includes a control module 101 and a virtual load module 102;

The control module 101 is used to obtain and record the current communication power of the communication system 201, obtain the current virtual load corresponding to the current communication power according to a preset power-load comparison table, and generate a corresponding virtual load according to the current virtual load. sending a load control signal to the virtual load module 102;

The dummy load module 102 is configured to adjust the size of the dummy load according to the received load control signal, so as to perform load compensation on the power supply 202 of the communication system 201 according to the adjusted dummy load.

Specifically, the control module 101 is connected to the communication system 201 to communicate with the communication system 201; the control module 101 is also connected to the virtual load module 102; the power supply 202 is connected to the communication system 201 to provide power to the communication system 201; the virtual load module 102 is connected to the power supply 202 to configure a dummy load for the power supply 202 .

In the actual communication process, the control module 101 obtains and records the current communication power of the communication system 201, wherein the communication power includes transmit power and receive power. The current communication power is correspondingly the transmit power, and when the communication system 201 is currently in the RX state (that is, the state of receiving radio frequency signals), the obtained current communication power is correspondingly the received power; after the control module 101 obtains the above-mentioned current communication power, it searches for the preset The power-load comparison table, obtains the current virtual load required by the power supply 202 of the communication system 201 under the above-mentioned current communication power according to the above-mentioned current communication power, and generates a corresponding load control signal according to the obtained current virtual load, and the control module 101 sends the generated load control signal to the virtual load module 102; after receiving the load control signal sent by the control module 101, the virtual load module 102 adjusts the size of the virtual load of the virtual load module 102 according to the received load control signal, and The load compensation is performed on the power supply 202 of the communication system 201 according to the adjusted virtual load, wherein the total load of the power supply 202 is equal to the sum of the actual load and the compensated virtual load, and the actual load of the power supply 202 has dynamic changes (that is, to the communication The system 201 provides a changing current), and makes a complementary change through the compensated dummy load (ie, correspondingly obtains a complementary current through the compensated dummy load), so that the total load of the power supply 202 remains unchanged.

It should be noted that the control module 101 can be set outside the communication system 201, or the control module 101 can also be set inside the communication system 201, for example, the control module 101 is a controller such as a CPU in the communication system 201, and the present invention implements Examples are not specifically limited.

A ripple elimination device for a power supply of a communication system provided by an embodiment of the present invention includes a control module and a virtual load module. The control module acquires and records the current communication power of the communication system, according to a preset power-load comparison table. Obtain the current virtual load corresponding to the current communication power, and generate a corresponding load control signal according to the current virtual load and send it to the virtual load module; adjust the size of the virtual load according to the received load control signal through the virtual load module, so as to adjust the size of the virtual load according to the adjusted load control signal. The dummy load performs load compensation on the power supply of the communication system, so that the dynamic ripple of the power supply of the communication system can be eliminated, the quality of the radio frequency signal can be improved, and the data throughput can be improved.

1, in another preferred embodiment, the control module 101 is specifically configured to obtain the power-load comparison table in advance through the following steps:

acquiring several power consumptions corresponding to several transmit powers of the communication system 201;

Acquiring several actual loads corresponding to the several power consumptions according to the several power consumptions and the circuit parameters of the power supply 202;

The power-load comparison table is obtained according to the number of transmit powers, the number of power consumptions, and the number of actual loads; wherein, the transmit power, power consumption, and actual load in the power-load comparison table have One-to-one correspondence.

Specifically, in combination with the above embodiments, a power-load comparison table is preset in the control module 101 , and the power-load comparison table includes a plurality of transmit powers of the communication system 201 and the data of the communication system 201 corresponding to each transmit power. The power consumption and the actual load of the power supply 202 corresponding to each transmit power, the transmit power, the power consumption and the actual load in the power-load comparison table have a one-to-one correspondence.

When acquiring the above power-load comparison table, the control module 101 first acquires several power consumptions corresponding to several transmission powers of the communication system 201, and then obtains several power consumptions and the power supply corresponding to each power consumption according to the obtained several power consumptions. The circuit parameter calculation of 202 obtains the actual load of the power supply 202 corresponding to each power consumption, correspondingly obtains several actual loads, and finally stores the obtained several transmit powers, several power consumptions and several actual loads in the preset correspondingly. in the empty power-load comparison table, so as to obtain the above-mentioned power-load comparison table.

It should be noted that the transmission power of the communication system 201 can be obtained by customizing the performance of the communication system 201. In different scenarios, the transmission power of the communication system 201 varies within a certain range; The corresponding power consumption (that is, the output power of the corresponding power supply 202) can be obtained by testing according to the actual working state of the communication system 201; the actual load of the power supply 202 of the communication system 201 under each transmit power can be obtained according to the corresponding Power consumption and circuit parameters (such as power supply voltage, current and other parameters) are calculated.

It can be understood that in order to obtain a more accurate power-load comparison table, the transmission power of the communication system 201 can be divided into more detail, that is, the more the number of transmission powers in the power-load comparison table, the above-mentioned current communication power is in The higher the matching degree in the power-load comparison table, the more accurate the corresponding obtained current virtual load, that is, the better the load compensation effect on the power supply 202 is.

1, in another preferred embodiment, the control module 101 is specifically configured to obtain the current virtual load through the following steps:

Determine whether the current communication power is transmit power;

When the current communication power is the transmit power, determining that the current virtual load is zero;

When the current communication power is not the transmit power, obtain the last recorded transmit power, obtain the actual load corresponding to the last recorded transmit power according to the power-load comparison table, and determine the Current dummy load.

Specifically, in combination with the above-mentioned embodiment, after obtaining the above-mentioned current communication power, the control module 101 determines whether the above-mentioned current communication power is the transmit power. The load of the power supply 202 in the TX state is relatively large, so there is no need to perform load compensation, and the current virtual load is set to zero; when it is determined that the current communication power is not the transmit power, it means that the communication system 201 is currently in a non-TX state (ie, an RX state). , since the load of the power supply 202 in the RX state is relatively small, load compensation is required, and the control module 101 obtains the transmit power of the last record, and searches the power-load comparison table for the last record according to the transmit power of the last record. The actual load corresponding to the transmit power of the , so as to determine the current virtual load according to the actual load corresponding to the last recorded transmit power found.

For example, if it is determined that the current communication power is not the transmission power, and the actual load of the power supply 202 of the communication system 201 is R1 at this time, according to the actual load corresponding to the last recorded transmission power found in the above power-load comparison table If it is R2, then determine the current virtual load R=R2-R1.

1, in yet another preferred embodiment, the virtual load module 102 at least includes a resistance unit;

The virtual load module 102 is specifically configured to adjust the resistance value of the resistance unit according to the load control signal, so as to perform load compensation on the power supply 202 according to the adjusted resistance unit.

Specifically, in combination with the above embodiment, after receiving the load control signal sent by the control module 101, the virtual load module 102 adjusts the resistance value of the resistance unit according to the received load control signal, and communicates with the communication unit according to the adjusted resistance unit. The power supply 202 of the system 201 performs load compensation, so as to provide additional virtual load compensation for the power supply 202 through the resistance of the resistance unit, so as to maintain the total load of the power supply 202 constant.

To sum up, the apparatus for eliminating ripple of a power supply of a communication system provided by the embodiment of the present invention has the following beneficial effects:

(1) It can eliminate the dynamic ripple of the power supply of the communication system and reduce the influence of the power quality on the radio frequency signal, thereby improving the quality of the radio frequency signal;

(2) It can avoid untimely dynamic response of the power supply, reduce the impact of dynamic response capability on data throughput, and thereby improve data throughput;

(3) The prior art can only optimize and alleviate the dynamic ripple of the power supply to a certain extent, and the embodiments of the present invention can solve the problem of dynamic adjustment of the power supply in a true sense, and improve the stability of the communication system;

(4) There are many power supply schemes in the prior art. For the debugging of dynamic ripple, different schemes have different debugging effects, and the debugging process is limited by the power supply scheme. The embodiment of the present invention can reduce the complexity of the power supply scheme. Picky, independently solve the problem of dynamic adjustment of power supply, effective for any power supply scheme;

(5) In the prior art, a large capacitor is placed near a high-power device (such as a radio frequency PA) in a communication system, which requires a higher layout space of the circuit board, and the cost of the large capacitor is relatively high. The embodiment of the present invention does not need to change the communication system. The hardware structure, and the use of external resistors for load compensation, the cost is relatively low.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principle of the present invention, several improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (4)

1. The ripple wave eliminating device of the power supply of a kind of communication system, characterized by, the said device includes control module and fictitious load module;

the control module is used for acquiring and recording the current communication power of a communication system, acquiring a current virtual load corresponding to the current communication power according to a preset power-load comparison table, generating a corresponding load control signal according to the current virtual load and sending the load control signal to the virtual load module;

the virtual load module is used for adjusting the size of a virtual load according to the received load control signal so as to perform load compensation on the power supply of the communication system according to the adjusted virtual load.

2. The ripple cancellation device of a power supply of a communication system according to claim 1, wherein the control module is specifically configured to pre-obtain the power-load comparison table by:

acquiring a plurality of power consumptions corresponding to the communication system under a plurality of transmitting powers;

acquiring a plurality of actual loads corresponding to the plurality of power consumptions according to the plurality of power consumptions and the circuit parameters of the power supply;

obtaining the power-load comparison table according to the plurality of transmitting powers, the plurality of power consumptions and the plurality of actual loads; wherein, the transmitting power, the power consumption and the actual load in the power-load comparison table have a one-to-one correspondence relationship.

3. The ripple cancellation apparatus of a power supply of a communication system according to claim 1, wherein the control module is specifically configured to obtain the current virtual load by:

judging whether the current communication power is transmitting power;

when the current communication power is transmitting power, determining that the current virtual load is zero;

and when the current communication power is not the transmitting power, acquiring the transmitting power recorded at the last time, acquiring the actual load corresponding to the transmitting power recorded at the last time according to the power-load comparison table, and determining the current virtual load according to the acquired actual load.

4. The ripple cancellation apparatus of a power supply source of a communication system according to claim 1, wherein the dummy load module includes at least a resistance unit;

the virtual load module is specifically configured to adjust the resistance value of the resistance unit according to the load control signal, so as to perform load compensation on the power supply according to the adjusted resistance unit.

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