JPH0349434A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To always display accurate reception electric field strength by correcting reception electric field strength corresponding to a mode in use. CONSTITUTION:The equipment is radio communication equipment for an automobile telephone system, etc., and a storage means 164 which stores the correction data of the reception electric field strength corresponding to the mode in use of the radio communication equipment is provided. When a driving method relating to the reception electric field strength is informed to a user, the reception electric field strength is corrected and informed based on correction data stored in the storage means 164. Thus, it is possible to always display the accurate reception electric field strength by performing the correction of the reception electric field strength corresponding to the mode in use of the radio communication equipment, and displaying corrected reception electric field strength.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a wireless communication device such as a car telephone device.

(Prior Art) A car telephone device is equipped with a function of detecting received electric field strength in order to control transmission output, determine whether the device is within a usable range, and so on.

Furthermore, since it is meaningful for the user to know these things, the received electric field strength is often displayed on a display unit such as a liquid crystal display.

Incidentally, in recent years, portable and vehicle-mounted wireless telephone devices have been developed and commercialized.

This dual-purpose type radio telephone device consists of an in-vehicle unit that is attached to the vehicle side, and a portable radio that is attached to the in-vehicle unit and used, and which can be removed and functions as an independent radio telephone device. be done.

The control section, display section, key section, etc. are provided on the portable radio device side, and in any case, these are commonly used.

However, in such a dual-purpose radio telephone device, the route from the antenna to each part during reception differs depending on whether the portable radio is attached to the vehicle body or used independently.

Therefore, when trying to display the received electric field strength on the display unit as described above, the received electric field strength is the same when the portable wireless device is attached to the vehicle body and when used independently. There was a problem that the displayed values were different.

(Problem to be Solved by the Invention) In this way, in a portable and in-vehicle type radio telephone device, when the received field strength is displayed on the display unit, it is independent of when the portable radio device is attached to the in-vehicle unit body. There is a problem in that the displayed values are different even though the received electric field strength is the same.

The present invention has been made to solve this kind of confusion, and it is an object of the present invention to provide a wireless communication device that can always accurately display received field strength.

[Structure of the Invention] (Means for Solving the Problems) The present invention receives a wireless signal arriving via a wireless line, measures the received electric field strength of the received signal, and calculates the received electric field strength based on the measured received electric field strength. In a wireless communication device configured to notify a user of related information, a storage means is provided for storing correction data of received electric field strength according to the usage mode of the wireless communication device, and a multiplication method related to the received electric field strength is used. When notifying a person, the received electric field strength is corrected based on the correction data stored in the storage means.

(Function) In the present invention, the received electric field strength is corrected according to the usage mode of the wireless communication device, and the corrected received electric field strength is used for display, so that the received electric field strength is always displayed accurately. will be held.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram for explaining an embodiment of a portable and vehicle-mounted wireless telephone device according to the present invention.

The radio telephone device shown in the figure is composed of a portable radio device 100 and an in-vehicle main body (adapter unit) 200.

The portable radio device 100 includes an antenna 101 and a changeover switch 1.
The audio/control unit is composed of a radio unit 103 that forms a wireless line with O2 and a base station (not shown) and transfers signals, a control unit 104, and an audio unit 105, and performs overall control of the entire device. unit 106, IDROM 107 in which the system ID number of the zone corresponding to the location where this device is registered and the telephone number corresponding to the location where this device is registered are registered, a power selector switch 1;
08 and controls the power supply to the portable radio 129, a rechargeable battery 108 that serves as a power source when portable, a connection section 111 connected to the vehicle-mounted section main body 200, an operation display section 112, an audible sound Speaker 113 and microphone 114 for input/output, and output amplifier 11
5. The main part consists of an input amplifier 116. The operation display section 112 displays key part 1 to which a predetermined key is pressed.
17, a display section 118 that displays a predetermined display, a switch section 119 that performs various switching operations, a key part 117, a display section 11
8, an operation/display control section 120 that controls the switch section 119, and a voltage detection circuit 130 that detects the voltage level of the power supply path 130a.

The output amplifier 115 amplifies an audible sound signal (voice signal) sent from the audio section 105 of the portable radio device 100 and outputs it from the speaker 113. The input amplifier 116 amplifies the audible signal (speech signal) input from the microphone 114. The amplified signal is input to the audio section 105 of the portable radio device 100.

The operation/display control unit 120 is the audio/control unit 106
It performs overall control on the operation display section 112 based on control signals sent from the key section 117, and also sends control signals input from the key section 117 to the audio/control section 106. The display unit 118 includes a liquid crystal display (not shown) and a display driver.
The liquid crystal display is driven under the control of the display control unit 120 to display, for example, received electric field strength. Part 117
are numeric keys "0" to "9""*","#", rs
NDJ, rsTOJ, rENDJ, rRCLJ, rFC
NJ rCLRJ, rEMRJ, “MUTEJ, rT
It consists of a keypad (not shown) such as ONEJ function keys, and when the keypad is pressed, this is recognized by the operation/display control unit 120. The switch unit 119 is provided with a hook switch and an ON10FF switch (not shown), and the hook switch detects whether the portable radio device 100 is on-hook or off-hook.

Note that the hook switch may also be provided on the vehicle-mounted section main body 200. The 0N10FF switch switches the 0N10FF of the entire wireless telephone device, and the switching signal is sent from the operation/display control section 120 to the audio/control section 1.
Sent on 06.

The in-vehicle main unit 200 includes an antenna 20 attached to the vehicle.
1. A booster 2O2 that amplifies the signal transmitted and received by the antenna 201 to a constant power, and a booster 2O2 that amplifies the signal transmitted and received by the antenna 201,
Audio/control unit 203 that performs overall control of the entire 0
, a power supply control unit 204 that supplies power from the vehicle battery B to each part, a connection unit 205 that is connected to the connection unit 111 of the portable radio 100 via the coaxial cable 300, and a speaker 206 for inputting and outputting audible sounds. and microphone 207
, an output amplifier 208, and an input amplifier 209. The booster 202 is an antenna duplexer 21
0, a circulator 211, a receiving amplifier 212, a transmitting amplifier 213, and an automatic power control circuit (APC) 214 that controls the transmission level of the transmitting amplifier 213.

Next, details of the portable radio device 100 will be explained.

FIG. 2 is a block diagram showing in detail the configuration of the above-mentioned portable radio device 100.

As shown in the figure, the radio section 103 includes a demodulator 131, a modulator 132, a power amplifier 133, a duplexer 134,
It is composed of a synthesizer 135. Demodulator 131
is transmitted through the antenna 101 on the portable radio device 100 side, the changeover switch 1O2, and the duplexer 134, or the antenna 201 on the vehicle-mounted section main body 200 side, the booster 2O2,
It demodulates the received signal from the base station that is input via the changeover switch 1O2 and the duplexer 134. Note that this signal includes a control signal, an audible sound signal, and the like.

FIG. 3 is a diagram showing the configuration of demodulator 131.

As shown in the figure, the received signal sent from the duplexer 134 is mixed with a predetermined signal generated from the signal source 131b by the mixer 131a, and is mixed by the IF amplifier 131c.
is amplified by Furthermore, it is mixed with a predetermined signal generated from the signal source 131e by the mixer 131d,
It is amplified by a 1F amplifier 131f. And IF-
Sent to IC131g.

1F-IC131g is a multi-stage linear amplifier 131
h, . In addition, in IF-IC131g,
The output of each linear amplifier 131h is detected through a diode 1311, and these detected signals are sent to an A/D converter 131j.

The A/D converter 131j converts the detection signal, which is an analog signal, into a digital signal, and converts this digital signal into a CP
Send to U161.

In this way, the diode 131i and the A/D converter 131j
The signal input to the CPU 161 via is a received field strength signal. Based on this received field strength signal, the CPU 161 controls the transmission output and determines whether or not the device is outside the service area.

The modulator 132 modulates the audible signal, control signal, etc. output from the audio/control unit 106 to generate a transmission signal. Power amplifier 133 amplifies the transmission signal output from modulator 132.

The duplexer 134 is connected to the antenna 101 or the antenna 2.
A received signal inputted via the power amplifier 01 is sent to the demodulator 131, and a transmitted signal inputted via the modulator 132 and the power amplifier 133 is sent to the antenna 101 or the antenna 201.

The synthesizer 135 is a local oscillator for channel selection, and the frequency to be demodulated by the demodulator 131 and the frequency to be demodulated by the modulator 13
2 specifies the frequency to be modulated.

The audio/control unit 106 includes a CPU 161, an oscillator/
Frequency divider 162, address decoder 163, ROM 164
, RAM 165, radio section control section 166, audio section 1
67, control signal processing section 168, audio section control section 16
9, a digital interface 170, and an interrupt controller 171. In the figure, 107 is the above-mentioned IDROM, 109 is a power supply control unit, 172 is, for example, an 8-bit data bus, 173 is an address bus, and 1
74 is a control bus.

The CPU 161 performs overall control of the audio/control unit 106 as a whole. For example, as described above, based on the received field strength signal input via the diode 131i and the A/D converter 131j, control of the transfer output and determination of whether or not the service area is outside are performed. Alternatively, the display section 118 is caused to display the received electric field strength. Oscillator/divider 16
2 supplies a clock to the CPU 161, and also divides the frequency of this clock and supplies it as a timing signal to each part. Address decoder 163 outputs predetermined operation signals to each section in response to command signals from CPU 161. R
The OM 164 stores various programs necessary for the operation of the CPU 161. The ROM 164 also stores predetermined data for data correction performed when the display unit 118 measures the received electric field strength, which will be described later. R.A.
The Ml 65 stores various data during processing by the CPU 161. The wireless unit control unit 166 controls the wireless unit 103 based on instructions from the CPU 161.

For example, the radio unit control unit 166 controls the synthesizer 135
The frequency to be specified by the power amplifier 133, the amplification factor to be amplified by the power amplifier 133, the modulation degree to be modulated by the modulator 132, etc. are specified, and as a measure to prevent malfunction, the synthesizer 135
The out-of-sync signal output from the power amplifier 133, the output detection signal output from the power amplifier 133, etc. are input and sent to the CPU 16.
Tell 1. The audio section 167 converts the control signal from the received signal demodulated by the demodulator 131 into the control signal processing section 16.
Among the received signals, an audible sound signal is sent to the speaker 113 via the output amplifier 115. The audio section 167 also receives a control signal output from the control signal processing section 168 and inputs it from the microphone 114 to the input amplifier 116.
The audible signal output through the modulator 132 is sent to the modulator 132. Note that the audio section 167 includes the control signal processing section 16
It has the functions of waveform shaping of the control signal to be sent to the modulator 8 and filtering of the control signal to be sent to the modulator 132.

The control signal processing unit 168 performs bit synchronization and frame synchronization with the control signal output from the audio unit 167, captures control data from the base station included in the control signal, which is a serial signal, as a parallel signal, and Control data as a parallel signal to be sent to the base station is sent to the audio section 167 as a control signal that is a serial signal.

The audio section control section 169 performs various controls on the audio section 167. For example, the audio section control section 169
is a switching control and control signal processing unit 116g that sends the received signal from the audio section 167 to the control signal processing section 168 or the output amplifier 115, or a transmission signal output from the input amplifier 116 to the audio section. 167 is carried out.

Digital interface 170 provides an interface between audio/control section 106 and operation display section 112 . The interrupt controller 171 interrupts the CPU 161 in response to interrupt commands from various parts.

The voltage detection circuit 130 detects the voltage level of the power supply path 130a, and if the voltage of the power supply path 130a is equal to or higher than a predetermined voltage, the w1m changeover switch 108 is connected to the power supply path 130a and the power control unit 109. At the same time, the selector switch 1O2 is driven so that the wireless section 103 and the booster 2O2 are connected. therefore,
When the portable radio device 100 is not connected to the vehicle-mounted unit main body 200, the power control unit 109 is supplied with power from the rechargeable battery 110, and the radio unit 103 is connected to the antenna 101.

Next, the received electric field strength, which is a feature of the present invention, is displayed on the display section 118.
We will explain the operation when displaying on .

As described above, the voltage detection circuit 130
Based on the detection result of the voltage level of 0a, the portable radio device 10
0 is attached to the vehicle-mounted section main body 200, and this information is notified to the CPU 161.

When the voltage detection circuit 130 determines that the portable wireless device 100 is not attached to the vehicle-mounted unit main body 200, it switches the changeover switch 1O2 to the antenna 1°1 side. Therefore, in this case, a received signal is introduced via the antenna 101, and this received signal is sent out in the order of the antenna 101→changeover switch 102→radio section 103 (see FIG. 1).

In the radio station 103, the signal is transmitted from the duplexer 134 to the demodulator 131 (see FIG. 2). In the demodulator 131, mixer 131a-IF amplifier 131cm+mixer 131d→!
It is sent out as F amplifier 131f → IF-IC131g (
(See Figure 3). Here, in the IF-IC 131g, the output of each linear amplifier 131h is connected to the diode 1311.
This detected signal is sent to the CPU 161 via the A/D converter 131j as a signal related to the received electric field strength.

On the other hand, if the voltage detection circuit 130 determines that the portable wireless device 100 is attached to the vehicle-mounted section main body 200, it switches the changeover switch 102 to the vehicle-mounted section main body 200 side. Therefore, in this case, a received signal is introduced via the antenna 201, and this received signal is transmitted from the antenna 201 to the booster 20.
2→Connection section 205→Selector switch 102→Wireless section 103
(See Figure 1). After this, the signal related to the received electric field strength passes through each part in the same way as in the case described above, and the signal related to the received electric field strength is sent to the CPU.
161.

As described above, the CPU 161 includes the voltage detection circuit 130.
It is notified that the portable radio device 100 is attached to the vehicle-mounted section main body 200.

The CPU 161 is configured so that the portable radio device 100 is
If the receiver is attached to the receiver, the signal related to the received electric field strength is corrected, and the display unit 118 is caused to display the received electric field strength based on the corrected signal related to the received electric field strength.

This correction is performed as follows. The received electric field strength is divided into five levels, as shown in FIG. 4, for example.

The second level is -70d13m or more, the second level is -70d
Less than Bg, -80dBm or more, 3rd level -80dB
-Less than -90dBm or more, 4th level is -90dBm
Less than -100dBm or more, 5th level is -100dB
(OdBm: 1 elf/
50Ω). These thresholds are −70 dBm, −
80dBm, -90dBm, -100dl
The digital output of A/D converter 1311 corresponding to 1- is held in ROM 164. The digital value corresponding to this threshold value is stored in the ROM as follows. In the initial state, the portable wireless device 100 is a single unit, a predetermined transmitter is placed near the antenna 101, and the transmitter receives -70 dB, -80 dBm, -90 dBm,
A radio signal with an output of -100 dBm is transmitted. The portable radio device 100 uses the output of the A/D converter 1311 at this time, for example, 50#60.70.80 as the threshold value corresponding to each radio signal, and outputs the RO via the CPU 161.
Stored in M164. Next, with the portable radio device 100 and the vehicle-mounted unit main body 200 connected, the antenna 200 is
Place a specified transmitter near the
Bm, -80dB■, -90dB-1-100dB■
The output of the radio wave signal is transmitted. The output of the A/D converter 1311 at this time, for example, 54.66.74.85
is input to the CPU 161. The CPU 161 stores this value in the ROM 164. In this way, the measured value at the time of connection is stored in the ROM 164 as a correction value. During normal operation, correction is performed as follows. The CPU 161 monitors the connection relationship between the portable radio device 100 and the vehicle-mounted unit main body 200 at short intervals, and if the portable radio device 100 is a single unit, the A/
The output of the D converter 1311 (received electric field strength) is stored in the ROM 16.
The received electric field strength is compared with threshold values 50, 60, 70, 80, and 90 within 4 to determine which of the first to fifth levels the received electric field strength is, and the result is displayed on the display unit 118.

On the other hand, when it is detected that the portable wireless device 100 is connected to the in-vehicle main body 200, the CPU 161 converts the output (received electric field strength) of the A/D converter 1311 into the correction threshold values 54, 66, . 74.85, it is determined which of the first to fifth levels the received electric field strength is, and the result is displayed on the display section 118.

In this way, the received electric field strength detected through the route of antenna 101 and the received electric field strength detected through antenna 201 are at the same level when the received signals have the same received electric field strength. Save correction data to ROM1
64 in advance, and the CPU 161 determines the level of received electric field strength based on this correction data.

In this way, in the wireless telephone device of this embodiment, the display section 118
This allows accurate display of the received field strength at all times.

That is, in the dual-purpose type wireless telephone device of this embodiment,
When the portable radio device 100 is attached to the in-vehicle unit main body 200 or used independently, the antenna 1 is used for reception.
The routes from 01 or 201 to each part are different.

Therefore, when trying to display the received electric field strength on the display section 118, the received electric field strength is the same when the portable wireless device 100 is used attached to the vehicle-mounted section main body 200 and when used independently. There was a problem that the displayed values were different.

Therefore, when the portable wireless device 100 is attached to the vehicle-mounted part main body 200 as in this embodiment, the signal related to the received field strength is corrected, and the signal related to the corrected received field strength is Display unit 1 displays the received electric field strength based on
1g, the display unit 118 can always accurately display the received electric field strength.

Note that the above correction may be performed on the signal related to the received electric field strength through either one path or both paths.

Further, a means for detecting the temperature is provided, and the signal related to the received electric field strength is corrected according to the temperature, and the received electric field strength is displayed on the display section 118 based on the signal related to the received electric field strength that has been corrected. It may be configured so that In this case, even if the component characteristics of each part change due to temperature changes, the display unit 118 can always accurately display the received electric field strength.

Furthermore, the configuration is configured to correct the signal related to the received electric field strength according to the used channel, that is, the used frequency, and cause the display unit 118 to display the received electric field strength based on the corrected signal related to the received electric field strength. You can. In this case, even if the strength of the received signal varies due to the characteristics of the filter, etc., the display unit 118 can always accurately display the received electric field strength.

[Effects of the Invention] As explained above, in the present invention, the received electric field strength is corrected according to the manner of use of the wireless communication device, and the display is performed using the corrected received electric field strength, so that the display is always accurate. The received electric field strength is displayed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a radio telephone device according to an embodiment of the present invention, FIG. 2 is a block diagram for explaining details of the portable radio device shown in FIG. 1, and FIG. FIG. 4 is a block diagram for explaining the details of the demodulator, and FIG. 4 is a diagram for explaining the operation of this embodiment. 100... Portable radio device, 101.201... Antenna, 1O2... Changeover switch, 103... Radio section,
130... Voltage detection circuit, 131... Demodulator, 13
11... Diode, 131j... A/D converter,
134... Transmitter/receiver duplexer, 161... CPU, 167
...audio section, 200...vehicle section main body, 205
...Connection part. Applicant Toshiba Corporation Patent Attorney Sasa Suyama - Figure 2

Claims (1)

[Claims] (1) To receive a wireless signal arriving via a wireless line, measure the received electric field strength of this received signal, and notify the user of information related to the measured received electric field strength. A wireless communication device according to the present invention is provided with a storage means for storing correction data of the received electric field strength according to the manner of use of the wireless communication device, and when informing the user of how to use the received electric field strength, the storage means A wireless communication device that corrects received field strength based on correction data stored in the wireless communication device. (2) The wireless communication device according to claim 1, wherein the storage means stores correction data according to a transmission path of a received signal within the wireless communication device. (3) The wireless communication device according to claim (1), wherein the storage means stores correction data according to the ambient temperature of the wireless communication device. (4) The wireless communication device according to claim (1), wherein the storage means stores correction data according to the wireless line used. (5) a receiving section including a plurality of receiving systems; a switching means for setting a signal received by one of the plurality of receiving systems as a received signal; and at least one of the plurality of receiving systems. and a correction means for correcting the received signal based on the correction data when the signal is received by a receiving system in which the correction data exists. A wireless communication device characterized by: (6) The receiving section includes a first and a second receiving system, the first receiving system is formed when the portable radio telephone is used alone, and the second receiving system is formed when the portable radio telephone is used alone. 6. The wireless communication device according to claim 5, which is formed when used with an adapter unit connected to the wireless communication device. (7) The switching means includes a switch means for uniformly forming one of the first and second receiving systems in response to a connection state between the portable radio telephone and the adapter unit. The wireless communication device according to claim (6). (8) The wireless communication device according to claim (5), wherein the holding means holds correction data for correcting the electric field strength of a signal received by at least one of the plurality of receiving systems. (9) Wireless communication consisting of an in-vehicle unit that is attached to the vehicle side, and a portable radio that is attached to the in-vehicle unit and functions as a wireless telephone, and is removed and functions as an independent wireless telephone. The apparatus includes: an attachment determining means for determining whether or not the portable wireless device is attached to the vehicle-mounted portion main body; a first detection means for detecting a received electric field strength from a received signal received from the part body side; a second detection means for detecting a received electric field strength from a received signal received by the receiver; a received electric field strength detected by the first detecting means and a received electric field strength detected by the second detecting means; a storage means storing predetermined data for making the received signals have the same received field strength; and based on the predetermined data stored by the storage means,
a correction means for correcting the reception electric field strength detected by the first detection means and/or the reception electric field strength detected by the second detection means; and displaying the reception electric field strength after correction by the correction means. A wireless communication device comprising: a display means;