JP2002190789A - Terminal station for radio communication system, base station for radio communication system, radio communication system, and method for compensating received electric field intensity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evade the increment of a circuit scale, to improve the detection accuracy of received field intensity and to more accurately detect the electric field intensity in a radio communication system using a code division multiple access communication system. SOLUTION: A terminal station 1 is constituted of a data generation part 17 for generating and outputting data to be transmitted and including control data and information data, a multiple number detection part 18 for detecting and outputting a multiple number indicating the number of transmission channels of the same carrier, a 1st compensation memory 19 for storing a compensation value corresponding to the multiple number outputted from the detection part 18 as a compensation parameter, a coder part 16 for encoding the compensation parameter outputted from a compensation parameter generation part 5 and data to be transmitted outputted from a data generation part 5 and outputting encoded data, and a 1st radio part 12a for converting CODEC data outputted from the coder part 16 into radio frequency and outputting a radio signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal station for communicating with a base station, and more particularly, to a terminal station capable of detecting a received electric field strength using a logarithmic amplifier and detecting accuracy of the received electric field strength due to a difference in signal waveform. TECHNICAL FIELD The present invention relates to a terminal station for a wireless communication system, a base station and a wireless communication system for a wireless communication system, and a method for compensating a received electric field strength, which can reduce the error of the wireless communication.

[0002]

2. Description of the Related Art CDMA as a multiple access wireless communication system
The (Code Division Multiple Access) system has inherent confidentiality and interference resistance, and is applied to various communication systems as a multiple access system capable of effectively using radio frequencies. I have. Recently, this CD
The MA scheme solves the degradation of transmission quality (hereinafter referred to as the near-far problem) caused by the fact that the position of each terminal station located in a wireless communication zone formed by a wireless base station is significantly changed or different. Has been applied to mobile communication systems.

[0003] Software-defined radios have also been studied and are being applied as illegal radio enforcement devices. This software defined radio is a transceiver that can support multiple modulation schemes, and by rewriting software that supports multiple modulation schemes with minimal hardware by downloading each time the modulation scheme is changed. It is realized.

Further, in recent years, the received signal strength (RSSI: Received Signal Strength Indicato
There is also a growing demand for improving the detection accuracy of r).
The reason why high detection accuracy is required is that the transmission power is specified by the system specifications. For example, N-
In a CDMA (Narrow-Band CDMA) system,
The relationship between the average transmission power and the average reception power is represented by equation (1).

Average transmission power (dBm) = − Average reception power (dBm) −Fixed value (dBm) (1) Further, in order to estimate the presence or absence of a radio wave transmitted by an illegal radio from RSSI, a software radio Also, the demand for the RSSI detection accuracy is increasing, and the detection accuracy is usually required to be several dB or less.

Conventionally, in this RSSI detection method, a logarithmic amplifier included in an RSSI detection unit of a receiver (a base station and a terminal station receiver) generates a voltage corresponding to the RSSI, and detects the RSSI and the RSSI. The RSSI is estimated and detected by using a memory stored in advance in association with the value (the output voltage). Further, as is well known, the RSSI detection unit is mainly provided in a high-frequency circuit, and an antenna mark is displayed on a display of a mobile phone based on the estimated RSSI.

In particular, according to the CDMA system, a method of estimating RSSI using a memory having a single correspondence table is generally used regardless of the number of multiplexed reception channels. FIG. 13 is a diagram showing an example of the characteristics of the input electric field (input electric field intensity) and the output voltage of the logarithmic amplifier. The output voltage of the characteristic curve shown in FIG. 13 indicates a detected value of the input electric field intensity. FIG. 14 shows an example of data in the memory table.

FIG. 14 is a diagram showing the correspondence between the output voltage and the RSSI. In a method for obtaining the data shown in FIG. 14, a digital value obtained by performing an analog / digital conversion (hereinafter, referred to as an A / D conversion) of an output voltage may be referred to as an input address of a memory (hereinafter, referred to as an input address). ) To obtain the output voltage written in the memory. That is, a receiver that receives an electric field whose reception electric field strength is unknown can estimate RSSI by using the output voltage of the RSSI detection unit as an input address.

As an example, in FIG. 14, when the output voltage of the RSSI detector is, for example, 0.84 V (volt), the input address is 50 (HEX, representing hexadecimal). Data labeled) is estimated to be -50 dBm. Similarly, if the output voltage of the RSSI detection unit is 1.26 V, the RSSI is estimated to be −30 dBm.

Further, if the data value held in the memory table is used as it is, the detection accuracy deteriorates.
A method of interpolating other data between the RSSI data by linear approximation is used. When this linear approximation is used, in the above example, the output voltages of 0.84 V and 1.26 V are -53 dBm and -32 dBm, respectively, and the detection accuracy is improved.

[0011]

SUMMARY OF THE INVENTION However, CDM
When the A method is used, an error occurs in RSSI detection, and an error occurs due to a difference in multiplex number. First,
The RSSI by the logarithmic amplifier will be described. RSSI
The output of a normal amplifier used as a logarithmic amplifier used for detection depends on the input intermediate frequency band signal waveform, not the input voltage, and the difference in the signal waveform causes a different offset in the output voltage. .

FIG. 15 is a block diagram showing an example of a circuit configuration of the logarithmic amplifier. The logarithmic amplifier 10 shown in FIG.
0 has a plurality of operational amplifiers 101 and an adder (Σ) 102. And the input signal (input voltage) is DC (Dire
ct Current) signal or square wave (square wave signal)
Assuming that the input signal is Vin and the output signal (output voltage) is Vout, the transfer function of the logarithmic amplifier 100 is expressed by equation (2).

Vout = Vy * Log (Vin / Vx) (2) where Vx and Vy are fixed voltages that determine the scaling of the logarithmic amplifier 100, respectively, Vx is an intercept voltage, and Vy is a slope voltage. Represents Also,
* And Log represent multiplication and natural logarithm, respectively. The intercept and slope are derived from the intercept and slope of the regression line used for traffic analysis, respectively, and are statistical parameters when designing system specifications.

The logarithmic amplifier 100 shown in FIG.
When used for SSI detection, if the input signal is other than a DC signal or a square wave, the output voltage will have an offset. FIG. 16 is a diagram showing output voltage offset values related to various input signal waveforms. The DC shown in FIG.
The error (dB) with respect to the signal is such that when the input signal waveform (input waveform) is a sine wave, a triangular wave, or the like, the input waveform is D
The error is based on the case of the C signal. That is, as an output voltage such as a sine wave, a voltage having a smaller value than the DC signal is output.

Next, in the CDMA system, the receiving side:
When a radio signal channel-multiplexed on the same carrier (same frequency) is received, the received signal waveform changes as the number of multiplexes increases. Therefore, similarly to the above, an offset occurs in the output voltage, and an RSSI detection error occurs.
FIG. 17 shows the number of multiplexes and RSS in the N-CDMA system.
It is a figure showing an example of the characteristic with I detection value. Each of the three characteristic curves shown in FIG. 17 has a different multiplex number (1
Code, 10 code and 60 code). And the deviation (interval) between these characteristic curves is
RSSI detection error, one code (single code)
, An error of about 4 dB occurs.

On the other hand, even in a multi-mode terminal that supports multi-mode (corresponding to a plurality of communication systems), such as a TACS + N-CDMA system, an output voltage offset similar to the above occurs, so that the received electric field in the RSSI detection unit is And the RSSI detection value (output voltage) must be estimated. For this reason, it is necessary to prepare a plurality of estimation memories, and there is a problem that the circuit scale increases.

In a radio communication system supporting a plurality of modulation schemes, the number of memories corresponding to the number of modulation schemes is required, and the circuit scale increases. Further, C
In the DMA system, regardless of the number of received channel multiplexes, R
Since the SSI is estimated, RS
There is a problem that an SI detection error occurs.

In addition, as described with reference to FIG.
A normal device used as the logarithmic amplifier 100 is not an input voltage but an output corresponding to an input signal waveform, and the signal waveform causes an offset in an output voltage. Therefore, there is a problem that an error occurs in the output voltage depending on the number of multiplexed base stations in the CDMA system. Further, in a wireless communication system that supports a plurality of modulation schemes, there is a problem that an error occurs depending on the modulation scheme.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in a wireless communication system using a code division multiple access communication system, it is possible to avoid an increase in circuit size and to improve detection accuracy of a received electric field strength. It is an object of the present invention to provide a terminal station for a wireless communication system, a base station for a wireless communication system, a wireless communication system, and a method for compensating a received electric field strength, which can detect a more accurate received electric field strength.

[0020]

Therefore, a terminal station for a wireless communication system of the present invention generates a data to be transmitted including control data and information data, and outputs the data to be transmitted. A compensating parameter generator for outputting a compensating parameter used for correcting a detection error of the received electric field strength on the receiving side due to the difference, and a compensating parameter and data generated from the compensating parameter generator A coder unit for encoding data to be transmitted output from the unit and outputting encoded data; a first wireless unit for converting the encoded data output from the coder unit to a radio frequency and outputting a radio signal; (Claim 1).

[0021] Preferably, the coder section can be configured to perform coding using a code for identifying the own station and the other station. The compensation parameter generator can be configured as shown in the following (1-1) to (1-3). (1-1) A multiplex number detector that detects and outputs a multiplex number indicating the number of transmission channels for the same carrier, and a field intensity correction amount corresponding to the multiplex number output from the multiplex number detector as a compensation parameter. First correction memory to be held.

Here, the multiplex number detecting section corresponds to a plurality of holding sections for holding an enable signal, a first counter for outputting a channel number corresponding to the enable signal, and a channel number output from the first counter. An address output unit that outputs addresses of the plurality of holding units, and a second counter that counts the number of enable signals held in each of the plurality of holding units may be provided.

Further, the multiplex number detection unit may be configured to output an enable number for each channel group obtained by dividing a plurality of transmission channels. It may be configured to include a multiplex number memory for holding a multiplex number based on an address composed of a combination of enable signals indicating ON / OFF of a transmission channel.

(1-2) A multiplex number detecting section for detecting the multiplex number indicating the number of transmission channels for the same carrier and outputting the multiplex number as a compensation parameter. In addition, the compensation parameter generation unit can be configured to include a first control unit that inputs the compensation parameter in the compensation parameter generation unit to the coder unit.

(1-3) An intercept factor determining unit for determining an intercept factor according to a modulation method, and a memory for holding a field intensity correction amount corresponding to the intercept factor determined by the intercept factor determining unit as a compensation parameter. Further, a base station for a wireless communication system of the present invention receives a wireless signal including a compensation parameter and transmitted data, receives a frequency-converted wireless signal, and receives a received signal strength of the wireless signal. A second radio section for outputting a voltage, a decoding section for outputting a baseband signal resulting from the reception main signal output from the second radio section, and a reception field strength voltage output from the second radio section. A compensating parameter output unit for outputting received field strength data and a compensation parameter, and a correcting unit for outputting corrected received field strength data based on the received field strength data and the compensation parameter output from the compensation parameter output unit Data demodulation that outputs demodulated data based on the baseband signal output from the decoding unit and the corrected received electric field strength data output from the correction unit It is characterized in that it is configured to include bets (claim 2).

Preferably, the second radio section may be configured to receive a code-division multiplexed radio signal and output a reception main signal and a reception field strength voltage for the radio signal. The compensation parameter output unit outputs
It can be configured as shown in the following (2-1) to (2-3).

(2-1) An estimation memory for holding reception field strength data corresponding to the reception field strength voltage output from the second radio section, and a multiplex number indicating the number of transmission channels for the same carrier from the reception main signal. A first correction amount output unit that outputs the electric field intensity correction amount corresponding to (i) as a compensation parameter. Further, the first correction amount output unit outputs
It may be configured as an electric field intensity correction amount extraction unit that extracts and outputs the electric field intensity correction amount.

(2-2) An estimation memory for holding reception field strength data corresponding to the reception field strength voltage output from the second radio section, and a multiplex number indicating the number of transmission channels for the same carrier from the reception main signal. And a second correction amount output unit that outputs a field strength correction amount corresponding to the multiplex number output from the multiplex number reception unit as a compensation parameter.

Further, the second correction amount output section may be constituted by a second correction memory for holding the electric field intensity correction amount corresponding to the multiplex number. (2-3) an estimation memory for holding reception field strength data corresponding to the reception field strength voltage output from the second radio section, and a modulation parameter output section for outputting a modulation parameter indicating a modulation scheme from a reception main signal. A third correction amount output unit that outputs the electric field intensity correction amount corresponding to the modulation parameter output from the modulation parameter output unit as a compensation parameter.

Further, the third correction amount output section may be constituted by a third correction memory for holding the electric field intensity correction amount corresponding to the modulation parameter. Further, each of the above-described compensation parameter output units can be configured to include a memory control unit that reads reception electric field intensity data from an estimation memory based on the reception electric field intensity voltage and inputs the data to a correction unit. The control unit can be configured to output the received field strength data by a predetermined calculation based on the received field strength.

In addition, the second radio section can be configured to output the reception field strength voltage using an amplifier whose input voltage and output voltage have desired characteristics. Further, the above estimation memory stores the received electric field strength voltage
The reception field strength data can be held in consideration of an offset value based on a reference wave having predetermined characteristics.

The radio communication system according to the present invention comprises a plurality of terminal stations for transmitting and receiving radio signals modulated by a desired radio communication system, and a base station for communicating with the terminal stations. Unit, a compensation parameter generation unit, a coder unit, and a first radio unit. The base station further includes a second radio unit, a decoding unit, a compensation parameter output unit, a correction unit, It is characterized by comprising a demodulation unit (claim 3).

In addition, according to the reception field strength compensation method of the present invention, the terminal station modulates data to be transmitted for each of one or a plurality of transmission channels (modulation step). A compensation parameter used for correcting the detection error of the received electric field strength on the receiving side due to the difference in the signal waveform is acquired (compensation parameter acquisition step), and the terminal station is modulated in the modulation step. The present invention is characterized in that the data to be transmitted and the compensation parameter acquired in the compensation parameter acquisition step are encoded and the encoded data is transmitted (transmission step) (claim 4).

Further, the method for compensating the received electric field strength according to the present invention comprises:
A base station receives a radio signal having a compensation parameter used for correcting a detection error of a received electric field strength on a receiving side due to a difference in a signal waveform (reception step). Detecting the reception electric field strength of the radio signal received at (detection step),
It is configured to correct the detection error of the reception electric field strength based on the compensation parameter included in the radio signal received in the reception step and the reception electric field strength detected in the detection step (correction step). (Claim 5).

[0035]

Embodiments of the present invention will be described below with reference to the drawings. (A) Description of First Embodiment of the Present Invention FIG. 1 is a configuration diagram of a wireless communication system according to a first embodiment of the present invention. The wireless communication system 3 (hereinafter, may be referred to as a system 3) shown in FIG. 1 uses a code division multiple access communication system (CDMA system), and is used for a cellular phone service as an example of the system. It is something that can be done. The system 3 includes a plurality of terminal stations 1 that transmit and receive code division multiplexed radio signals (hereinafter, may be referred to as RF signals [Radio Frequency signals]).
The terminal station 1 and a base station 2 for communication are configured. Different codes are assigned to each of the base station 2 and each of the terminal stations 1 so that multiple access is possible. That is, RF
Signals are transmitted and received after being modulated by the CDMA method.

Here, each terminal station 1 transmits to the base station 2 R data together with data to be transmitted consisting of information data such as voice or file data and control data.
A correction parameter for correcting the SSI (reception electric field strength) (hereinafter, may be referred to as a compensation parameter) is transmitted. Then, the terminal station 1 multiplexes a plurality of transmission channels using the same carrier and transmits the multiplexed transmission channels to the base station 2.

Here, an example of a mode in which the terminal station 1 multiplexes a plurality of transmission channels is a method in which the terminal station 1 relays data transmitted by another terminal station and transmits the data to the base station 2. It is. Alternatively, the terminal station 1 may divide the data to be transmitted into a plurality of pieces, multiplex them, and transmit the multiplexed data to the base station 2. In addition, the base station 2 receives a compensation parameter in addition to the information data and control data transmitted from each terminal station 1, and based on the compensation parameter,
The SSI is corrected. The base station 2 is connected to an exchange 4a having an exchange function and can exchange data with a network 4b accommodating another exchange (not shown).

The terminal stations 1a, 1b and the base stations 2a, 2
b and the wireless systems 3a and 3b are a modified example of the first embodiment, a second embodiment, and a modified example of the second embodiment described below (hereinafter, may be abbreviated as other embodiments and the like, respectively). It will be explained in. FIG. 2 is a block diagram of the transmission unit of the terminal station 1 according to the first embodiment of the present invention. The terminal station 1 shown in FIG. 2 is a mobile station such as a mobile phone or a mobile terminal, and a main part of a transmission unit (transmission system) is a main control unit 14.
a, a baseband unit 15, a first wireless unit 12a, and an antenna 11a.

The terminal station 1 has a receiving section (receiving system) in addition to the transmitting section. Although not shown, the receiving section includes a high-frequency circuit for receiving and processing a high-frequency signal, It has a reception baseband signal processing unit for processing a reception baseband signal output from the circuit, an audio processing circuit, a speaker, and the like. Since these are known, detailed description will be omitted. Each of the terminal stations 1 (1a, 1b) according to the first embodiment and other embodiments described below has its receiving unit. Hereinafter, terminal station 1 (terminal station 1 described later)
Regarding a, 1b), the transmission section will be mainly described.

First, the main control unit 14a controls each unit of the baseband unit 15, the first radio unit 12a, and the terminal station 1. This function, for example,
(Central Processing Unit), ROM (Read Only Mem)
ory), RAM (Random Access Memory), and the like are realized by cooperating software. Further, the baseband unit 15 generates a signal (information data and control data) to be transmitted according to the control by the main control unit 14a, and performs a logical operation (logical processing) required to input the signal to the first wireless unit 12a. The data generation unit 17, the compensation parameter generation unit 5, the coder unit (CODER) 16
And a modulating unit 25. The signal in the baseband unit 15 is a digital signal,
The function of the baseband unit 15 is, for example, an IC (Integrated
Circuit), LSI (Large Scale Integration) and the like.

Here, the data generation section 17 generates and outputs data to be transmitted including control data and information data. For this reason, the data generation unit 17
, Transmission data generating units 17-1 to 17 for generating data to be transmitted for each of the terminal stations 1
-N. The compensation parameter generation unit 5 (FIG. 2)
) Outputs a compensation parameter used for correcting (compensating) an RSSI detection error on the receiving side (base station 2) due to a difference in signal waveform. 18 and a first correction memory 19. Here, the multiplex number detecting unit 18 detects and outputs the multiplex number indicating the number of transmission channels for the same carrier, and the first correction memory 19 stores the multiplex number output from the multiplex number detecting unit 18. A corresponding electric field intensity correction amount (hereinafter, may be abbreviated as a correction amount) is stored as a compensation parameter.

That is, the first correction memory 19 stores the number of multiplexes and the amount of correction in association with each other, and stores the number of multiplexes as an address in its address area.
The correction amount (dBm or the like) of the RSSI detection error that may occur in the above is read by the main control unit 14a. The first correction memory 19 is, for example, a ROM
The function is realized by (Read Only Memory), and the same applies to other memories described later unless otherwise specified.

Accordingly, the parameter for RSSI compensation in base station 2 is transmitted from terminal station 1 and base station 2
Can correct an RSSI detection error that may occur due to a difference in signal waveform due to a difference in the number of multiplexes, based on the compensation parameter. Next, the multiplex number detector 18
Will be described with reference to FIG.

FIG. 3 is a block diagram of the multiplex number detector 18 and the data generator 17 according to the first embodiment of the present invention.
The multiplex number detecting section 18 shown in FIG. 3 includes a first control section 24 and an enable number counter 30. Here, the first control unit 24 inputs the compensation parameter in the compensation parameter generation unit 5 (see FIG. 2) to the coder unit 16. Specifically, the first control unit 2
4 monitors and controls the number of multiplexes in the multiplex number detector 18;
The correction amount based on the multiplex number is read from the first correction memory 19 using the multiplex number as an address, and the correction amount is input to the coder unit 16. Thereby, the correction amount can be controlled according to the communication status.

The enable number counter 30 counts the number of enable signals indicating ON / OFF of the transmission channel for the same carrier, and is a flip-flop of the transmission channel (the one indicated as FF). ) 31a to 31d, 30d, an n-ary counter (first counter: n is an integer of 2 or more) 30a, a decoder (address output unit) 30b, and an n-ary counter (second counter) 30c. ing.

Here, the flip-flops 31a, 31
, 31d hold the enable signal, respectively.
1, 17-2, 17-3,..., 17-n are latched. Also, an n-ary counter 30a
Outputs a channel number corresponding to the enable signal, and the decoder 30b outputs addresses of a plurality of flip-flops 31a to 31d corresponding to the channel number output from the n-ary counter 30a. Counter 30c has a plurality of flip-flops 3
The number of enable signals held in each of 1a to 31d is counted.

As a result, the count value of the n-ary counter 30a is sequentially decoded, and the flip-flops 31a to 31a
A disable signal (operation stop signal) is sequentially generated for ones other than the transmission channel out of 1d, and the n-ary counter 30c sequentially outputs the same number as the number of flip-flops other than the disabled flip-flops 31a to 31d. It is designed to count up.

When the count cycle (1 to n) of the n-ary counter 30a ends, the count value (the number of enable signals) of the n-ary counter 30c at that time is output as the number of multiplexed transmission channels by the carry-out signal. It is. At this time, the n-ary counter 30c is reset by the carry-out signal. This allows
The enable signals 1 to n of the data generation unit 17 for each channel are all scanned by one n-ary counter 30a, and the number of enable signals enabled by another n-ary counter 30c is counted. Is done.

That is, the enable number counter 30
By counting the number of enable signals of the transmission data generation units 17-1 to 17-n, the number of multiplexed transmission channels of the same carrier is detected. Therefore, the count of the number of enable signals can be speeded up. further,
The operation of counting the number of enable signals is not required, and the speed of multiplex number detection can be increased.

The configuration shown in FIG. 3 can be used in other embodiments described later. Subsequently, the coder unit 16 (see FIG. 2) encodes (encodes) the compensation parameter output from the compensation parameter generation unit 5 and the data to be transmitted output from the data generation unit 17 to perform encoding. Data (coding data)
Is output. In addition, the coder unit 16 performs encoding using a code for identifying the own station and the other station.

More specifically, the coder 16 encodes the data to be transmitted to the base station 2 generated by the data generator 17 by using a spreading code assigned to the terminal station 1. It has become. Thereby, the number of subscribers can be increased. The coder unit 16 is provided as a codec unit together with a decoding unit (not shown) for processing coding data included in the RF signal transmitted from the base station 2.

As a result, data to be transmitted is generated by the data generation unit 17, and the multiplex number in the data generation unit 17 is detected by the multiplex number detection unit 18. Then, the correction amount based on the multiplex number is read from the first correction memory 19 by the first control unit 24, and the correction amount is input to the coder unit 16. Further, in the coder 16, the correction amount and the data to be transmitted output from the data generator 17 are channel-coded, and the coded data is input to the modulator 25.

Further, modulation section 25 outputs the output from coder section 16 (a signal to be transmitted after spreading, a transmission multiplexed signal) to Q
Primary modulation is performed using PSK (Quadrature Phase Shift Keying) and an intermediate frequency signal (hereinafter referred to as IF signal [Intermed
iate Frequency signal]. ) Is output. In addition, the first wireless unit 12 a
6 is to convert the encoded data outputted from 6 into a radio frequency and output an RF signal. This first wireless unit 12a
Is realized by, for example, a high-frequency circuit, and the base station 2
Receives the RF signal transmitted from the
It also outputs a signal. Hereinafter, a detailed description of the flow of reception will be omitted.

Further, the antenna 11a is connected to the first radio unit 1
The RF signal output from 2a is transmitted to a transmission line as a radio wave. The antenna 11a also has a function of receiving an RF signal. Thereby, the coder unit 1
The coding data output from 6 is primary-modulated by the modulator 25, and an IF signal is output. The IF signal is up-converted into an RF signal and level-amplified by the first radio section 12a, and then the antenna 11a
It is sent from.

Further, the method for compensating the received electric field strength according to the present invention comprises:
This is performed in a wireless communication system 3 including a plurality of terminal stations 1 for transmitting and receiving RF signals modulated by the CDMA system and a base station 2 for communicating with the terminal stations 1. First, the terminal station 1 modulates data to be transmitted for each of one or a plurality of transmission channels (modulation step).

Further, the terminal station 1 obtains, from the base station 2, a compensation parameter used for correcting an RSSI detection error on the receiving side due to a difference in signal waveform (compensation parameter). Acquisition step). Then, the terminal station 1 encodes the data to be transmitted modulated in the modulation step and the compensation parameter acquired in the compensation parameter acquisition step, and transmits the encoded data (transmission step).

Thus, the terminal station 1 and the base station 2 can be simplified, and the RSSI detection accuracy can be improved. Here, the frame transmitted from the terminal station 1 to the base station 2 is as shown in FIG. 6, for example. FIG. 6 is a diagram showing a format example of a transmission frame. A frame 41 shown in FIG.
a, data signal part (DATA1, DATA2) 41b,
41d, pilot signal section 41c and CRC (Cyclic R
edundancy Check) signal section 41e, and coder section 1
6 implements the above function by inserting the correction amount into the data signal unit 41b or 41d (or both).

[0058] Then, base station 2 transmits an R frame having a frame (see FIG. 6) transmitted from each of the plurality of terminal stations 1.
Upon receiving the F signal, each terminal station 1 is identified based on the spreading code assigned to each terminal station 1. Next, the flow of reception by the base station 2 will be described with reference to FIG. FIG. 4 is a block diagram of the receiving unit of the base station 2 according to the first embodiment of the present invention. The base station 2 shown in FIG. 4 is a fixed station, and a main part of a receiving unit of the base station 2 includes a main control unit 14b, an antenna 11b, a second radio unit 12b, and a baseband unit 36. It is configured.

The base station 2 has a transmitting unit (transmitting system) in addition to the receiving unit. The transmitting unit is not shown, but the microphone, the audio processing circuit, and the transmission output from the audio processing circuit. It has a transmission baseband signal processing unit for processing the baseband signal, a high frequency circuit for wirelessly transmitting the IF signal output from the transmission baseband signal processing, and the like. They are,
Since it is a well-known one, detailed description is omitted. Further, each of the base stations 2 (2a, 2b) of the other embodiments to be described later also has its transmitting unit. Hereinafter, regarding the base station 2, a receiving unit will be mainly described.

First, the main controller 14b controls each unit of the baseband unit 36, the second radio unit 12b, and the base station 2, and the antenna 11b transmits and receives RF signals. Then, the second wireless unit 12b
Is RSSI on the receiving side due to the difference in signal waveform.
Receiving an RF signal including a compensation parameter used for correcting a detection error of the
It outputs a receiving main signal obtained by frequency-converting the signal and an RSSI voltage for the RF signal.

The second radio section 12b receives a code-division multiplexed RF signal and outputs a received main signal and an RSSI voltage. This second wireless unit 12
The receiving unit b will be described in more detail with reference to FIG. FIG.
FIG. 3 is a block diagram of a receiving unit of the second wireless unit 12b according to the first embodiment of the present invention. The second wireless unit 12 shown in FIG.
b is a band-pass filter (BPF) 32a, 32e,
Low noise amplifier (LNA) 32b, mixer (MIX)
32c, 32f, local oscillators (Lo) 32d, 32g,
It comprises a low-pass filter (LPF) 32h, analog / digital (A / D) converters 32i and 32j, and a reception electric field strength detection unit (RSSI detection unit) 32k.

Here, the BPF 32a is connected to the antenna 11b.
LNA transmits only the desired frequency component of the code multiplexed signal transmitted from the terminal station 1 and removes unnecessary components such as noise of the received signal.
Reference numeral 32b amplifies the output of the BPF 32a to a desired level with low noise. Further, the mixer 32 c
The RF signal is down-converted to an IF signal by mixing the output of the NA 32b and the output of the local oscillator 32d, and the BPF 32e allows only a desired frequency component of the down-converted received signal to pass therethrough. It removes unnecessary components such as noise.

The mixer 32f down-converts the IF signal into a baseband signal by mixing the output of the BPF 32a and the output of the local oscillator 32d. The LPF 32h outputs the IF signal of the down-converted IF signal. Of these, only the desired frequency components are passed, and unnecessary components such as noise are removed. The A / D converter 32i converts the output (analog signal) of the LPF 32h into a digital signal.
The baseband signal converted into the digital signal is used as a reception main signal by the decoding unit 2 included in the baseband unit 36.
0 (described later).

The RSSI detector 32k (see FIG. 4)
Outputs an RSSI voltage using an amplifier whose input voltage and output voltage have desired characteristics. Specifically, a logarithmic amplifier (see FIG. 15) is used. The received signal (IF signal) after down-conversion by the mixer 32f (see FIG. 5) is input, and the RSSI voltage is detected from the input signal. As a result, a detection error due to a difference in the number of multiplexes caused by the input / output characteristics of the logarithmic amplifier of the RSSI detector 32k (see FIG. 13 and the like) is compensated. Further, existing circuit components can be diverted, and the versatility of the components can be maintained.

Further, the A / D converter 32j outputs the RS
The analog RSSI voltage (output RSSI voltage value) detected by the SI detection unit 32k is converted into a digital value, and this digital value is output to the data demodulation unit 21 (described later) of the baseband unit 36. . Therefore, the second wireless unit 12b transmits the RF signal to the baseband unit 36.
A received main signal obtained by frequency-converting a signal is output as digital data, and an RSS of the RF signal is output.
The I voltage is output as digital data.

Next, referring to FIG.
Is the second wireless unit 12 according to the control by the main control unit 14b.
b) for performing a necessary logical operation on the baseband signal output from the decoding unit (DECODER) 2
0, a compensation parameter output unit 6, a correction unit (reception electric field strength correction unit) 23, and a data demodulation unit 21.

The decoding section 20 is provided with a second radio section 12b.
And outputs a baseband signal resulting from the received main signal output from. The compensation parameter output unit 6 outputs received field strength data and compensation parameters resulting from the RSSI voltage output from the second radio unit 12b, and includes an estimation memory (primary estimation memory) 2
2, a first correction amount output unit (correction amount receiving unit) 26a, and a memory control unit 37.

Here, the estimation memory 22 stores the second radio unit 1
2b holds the received electric field strength data corresponding to the RSSI voltage output from 2b. The reception field strength data is, for example, a digital value of a voltage. Then, the RSSI based on the reference wave and the input voltage are held in advance so as to be associated with each other. The reference wave is, for example, a spread CDMA wave, and a predetermined value is used as its effective value, and the RSSI is primarily estimated.

The estimation memory 22 holds the received field strength data for the RSSI voltage in consideration of an offset value based on a reference wave having predetermined characteristics. This eliminates the need for special calculations, and
The SSI detection error can be corrected, and the circuit size can be reduced. In addition, the first correction amount output unit 26a
The correction amount corresponding to the multiplex number indicating the number of transmission channels for the same carrier is output from the reception main signal as a compensation parameter. This first correction amount output unit 26a
Is configured as an electric field intensity correction amount extraction unit that extracts a correction amount from a reception main signal and outputs the correction amount.

Further, the memory control section 37 reads out the received field strength data from the estimation memory 22 based on the RSSI voltage and inputs the data to the correction section 23. As a result, the compensation parameter output unit 6 sends the received field strength data estimated primary by the estimation memory 22 and the correction amount output from the first correction amount output unit 26a to the correction unit 23, respectively. , To be entered. This also increases the RSSI detection accuracy.

Next, the correction section 23 outputs corrected reception field strength data based on the reception field strength data output from the compensation parameter output section 6 and the compensation parameters. Further, the data demodulating section 21 outputs demodulated data based on the baseband signal output from the decoding section 20 and the corrected received electric field strength data output from the correcting section 23.

As a result, the reception field strength compensation method of the present invention is used by the base station 2 to correct the RSSI detection error on the receiving side (base station 2) due to the difference in the signal waveform. Receiving an RF signal having a compensation parameter (receiving step). Next, the base station 2 detects the RSSI of the RF signal received in the receiving step (detection step).

Then, the base station 2 determines the RSSI based on the compensation parameter included in the RF signal received in the receiving step and the RSSI detected in the detecting step.
Is corrected (correction step). Therefore, regardless of the multiplexing number of the terminal station 1 and the modulation method, the RS
SI detection error can be improved.

More specifically, the flow of reception in the base station 2 is as follows. An antenna 11b receives an RF signal from a transmission line, and the second radio unit 12b converts the frequency of the RF signal into a baseband signal. The band unit 36 performs logical processing necessary for reception under the control of the main control unit 14b.
The RSSI detector 32k of the second radio unit 12b converts the RSSI into an RSSI voltage using a logarithmic amplifier,
The RSSI voltage is sent to the data demodulation unit 21 and the decoding unit 2
Enter 0 for each. Then, the first correction amount output unit 26a receives the correction amount corresponding to the multiplex number from the reception main signal, and uses the correction amount as a compensation parameter as a correction parameter.
Enter 3 That is, RSSI
The voltage and the received data are separated.

Further, the estimation memory 22 stores the second wireless unit 1
2b based on the RSSI voltage output from
Is primarily estimated, the memory control unit 37 reads out the received field strength data corresponding to the RSSI voltage, and inputs the received field strength data to the correction unit 23. And the correction unit 2
3 corrects the RSSI based on each of the primary estimated RSSI and the correction amount.

As described above, the number of multiplexed transmission channels of the terminal station 1 is reported to the base station 2 as information for each sector (area obtained by dividing the radio communication zone) from the terminal station 1, and the base station 2 The output voltage of the logarithmic amplifier is corrected.
The wireless communication system 3 (see FIG. 1) of the present invention includes a plurality of terminal stations 1 for transmitting and receiving code-division multiplexed RF signals.
And a base station 2 that communicates with the terminal station 1. Then, the terminal station 1 generates and outputs data to be transmitted including control data and information data, and outputs the data to the data generation unit 17.
And RSSI on the receiving side due to the difference in signal waveform
, A compensation parameter generator 5 for outputting a compensation parameter used for correcting the detection error, and a compensation parameter output from the compensation parameter generator 5 and a transmission parameter output from the data generator 17. A coder unit 16 that encodes data and outputs encoded data, and a first wireless unit 12a that converts the encoded data output from the coder unit 16 into a radio frequency and outputs an RF signal.

Further, the base station 2 receives the RF signal,
Second radio section 12b that outputs a reception main signal obtained by frequency-converting an RF signal and an RSSI voltage for the RF signal
A decoding unit 20 for outputting a baseband signal resulting from the received main signal output from the second radio unit 12b; a received field strength data derived from the RSSI voltage output from the second radio unit 12b; And a compensation parameter output unit 6 for outputting
A correction unit 23 that outputs corrected reception field strength data based on the reception field strength data output from the controller and the compensation parameter, a baseband signal output from the decoding unit 20, and a correction reception output from the correction unit 23. A data demodulator 21 for outputting demodulated data based on the electric field strength data
With

The RS of the system 3 configured as described above
The method of correcting the SI will be described with reference to FIGS. First, data to be transmitted is generated for each transmission channel by the data generation unit 17 of the terminal station 1 in FIG. The data to be transmitted is spread in the coder unit 16 using a spreading code assigned to each terminal station 1 in advance, and the code-multiplexed RF signal is transmitted through the modulation unit 25 to the antenna 11a. Sent from

Further, in the terminal station 1, the multiplex number detecting unit 1
8 enable number counter 30
The number of enable signals 7-1 to 17-n is counted, and the multiplex number detection unit 18 monitors the number of multiplexes of the channel being transmitted and notifies the first control unit 24 of the number of multiplexes. Then, the first control unit 24 stores the correction amount data corresponding to the number of multiplexed transmission channels stored in advance in the first
The coder unit 16 is read from the correction memory 19 and controls the coder unit 16 to perform channel coding on the correction amount data together with other data to be transmitted.

Further, the main control section 14a controls the logic processing in the baseband section 15 and the first radio section 12a, respectively, and transmits the RF signal on which the correction amount data is superimposed. On the other hand, the RSSI detector 32k of the base station 2
Converts SSI to RSSI voltage, and converts the RSSI voltage to A
After performing the / D conversion, the main controller 14b is notified. The main control unit 14b primarily estimates the RSSI corresponding to the RSSI voltage from the estimation memory 22,
The transmission data framed in is separated.

The main control unit 14b separates the correction amount based on the multiplex number, and the correction unit 23 corrects the RSSI based on the separated correction amount. As described above, since the terminal station 1 transmits the correction amount to the base station 2 and the base station 2 corrects the RSSI detection error using the correction amount, the detection accuracy of the RSSI in the base station 2 is greatly improved. To improve.

Also, as described above, the terminal station 1 and the base station 2
Are determined to be reasonable values.
The power consumption of the terminal station 1 and the base station 2 can be reduced, the decrease in communication quality due to the near-far problem can be suppressed, and the number of terminal stations 1 that can be accommodated can be increased by improving the frequency use efficiency. By the way, the multiplex number detection unit 18 can use other forms. For example, two types (hereinafter, referred to as a second form and a third form) will be described with reference to FIGS. 7 and 8. Will be explained.

FIG. 7 is a second block diagram of the multiplex number detector and the data generator according to the first embodiment of the present invention. The multiplex number detector 18a shown in FIG. 7 outputs an enable number for each channel group obtained by dividing a plurality of transmission channels. This multiplex number detector 18a
Are the first control unit 24, the enable number counters 33a to 33
3c, adder (Σ) 34, flip-flop (FF) 3
0d. In FIG. 7, components having the same reference numerals as those described above are the same or similar components, and thus redundant description will be omitted.

Here, the enable number counters 33a to 33a
3c counts the number of enables for each channel group for the same carrier.
That is, the number n of transmission channels is divided, for example, every two channels, and transmission data generation units 17-1 to 17-n corresponding to each of the divided transmission channels are provided. Then, for each of those groups, the enable number counters 33a to 33c count the enable number.

Further, the adder 34 adds the outputs (count results) of the enable number counters 33a to 33c.
Is temporarily stored. Thereby, in the multiplex number detecting unit 18a, the enable number output from the first control unit 24 is changed to each of the enable number counters 33a to 33a.
Since counting is performed for each group at 33c, the speed can be greatly increased, and the detection of the multiplex number can be completed in a short time.

Further, this enables the enable signal to be divided into a plurality of blocks and counted in parallel, and the counter output is finally added, so that the operation speed is increased. Note that the multiplex number detection unit 18a shown in FIG. 7 can be used in other embodiments described later. Next, a third embodiment will be described.

FIG. 8 is a third block diagram of the multiplex number detector and the data generator according to the first embodiment of the present invention. The multiplex number detector 18b shown in FIG. 8 includes a multiplex number memory (address R) on the input side of the output flip-flop 30d.
OM) 35 are provided. Also, in FIG.
Components having the same reference numerals as those described above are the same or similar components, and thus redundant description will be omitted.

The multiplex number memory 35 stores the data
7 holds the number of multiplexes based on the address composed of a combination of enable signals indicating ON / OFF of the transmission channel for the same carrier, output from the same carrier. Then, each of the enable signals output from the first control unit 24 is held as, for example, 1-bit information in the flip-flops 31a to 31d, and n bits of each of the flip-flops 31a to 31d are read in the multiplex number memory 35. The multiplex number is input as an address signal, and the multiplex number stored in advance is read from an address area corresponding to the read address signal.

For example, when n = 3, the multiplex number memory 35
Multiplex number "1" in each area of addresses "001", "010" and "100", multiplex number "2" in each area of addresses "011" and "110", and area "111". The multiplex number "3" is stored in advance. That is, the number of "1" in the n-bit address represents the multiplex number.

Then, for example, the transmission data generator 17-
When the enable signal is supplied only to the two types 1 and 17-3, only the outputs of the flip-flops 31a and 31c become "
1 ", and the read address signal becomes" 101 ".
The multiplex number "2" stored in 1 "is read out and output as the multiplex number.

By applying the configuration shown in FIG. 8 to the enable number counters 33a to 33c for each group shown in FIG. 7, it is possible to further increase the speed. Further, the multiplex number detection unit 18b shown in FIG. 8 can be used in other embodiments described later. As described above, since the n enable signals to the transmission data generation units 17-1 to 17-n directly indicate the read addresses of the multiplex number memory 35, the count of the enable signals becomes unnecessary, and the multiplex number is further reduced. Detection can be completed in a short time.

(A1) Description of Modification of First Embodiment of the Present Invention In a modification of the first embodiment, terminal station 1a transmits a multiplex number as a compensation parameter to base station 2a. I have to. The wireless communication system 3a according to the modification is also the same as the system 3 shown in FIG. FIG. 9 is a block diagram of a transmission unit of the terminal station 1a according to a modification of the first embodiment of the present invention. The terminal station 1a shown in FIG.
Is a mobile phone or the like using a code division multiple access communication system, and includes a main control unit 14a, a baseband unit 15a,
It comprises a first radio unit 12a and an antenna 11a.

The base band unit 15a is provided in the main control unit 1
4a for generating a signal (information data and control data) to be transmitted in accordance with the control by 4a and performing a logical operation necessary for inputting the signal to the first radio unit 12a. It comprises a section 5a, a coder section 16 and a modulation section 25. Here, the compensation parameter generation unit 5a has a multiplex number detection unit 18 that detects the multiplex number indicating the number of transmission channels for the same carrier and outputs the multiplex number as a compensation parameter.

Further, the first control unit 24 transmits the compensation parameter in the compensation parameter generation unit 5a to the coder unit 16a.
Is to be entered. Specifically, the first control unit 24
Is configured to input the multiplex number in the multiplex number detection unit 18 to the coder unit 16. Thereby, the correction amount can be controlled according to the communication status. Note that components having the same reference numerals as those described above have the same or similar functions, and further description will be omitted.

Thus, the coder 16 performs channel coding on the multiplex number output from the multiplex number detector 18 and the data to be transmitted output from the data generator 17, and outputs coded data. Radio unit 12
From a, it is transmitted as an RF signal. Next, FIG. 10 shows a base station 2a according to a modification of the first embodiment of the present invention.
FIG. 3 is a block diagram of a receiving unit. The main parts of the receiving unit in the base station 2a shown in FIG. 10 include an antenna 11b, a second radio unit 12b, a baseband unit 36a, and a main control unit 14b.
It is configured with and. Note that components having the same reference numerals as those described above have the same or similar functions, and further description will be omitted.

Here, the baseband unit 36a performs a necessary logical operation on the baseband signal output from the second radio unit 12b under the control of the main control unit 14b. It comprises a parameter output unit 6a, a correction unit (reception electric field strength correction unit) 23, and a data demodulation unit 21. The compensating parameter output unit 6a outputs the received field strength data and the compensating parameters resulting from the RSSI voltage output from the second radio unit 12b, and outputs the estimated memory 22
And a multiplex number receiving section (displayed as multiplex number detecting section, reception) 26b, a memory control section 37, and a second correction amount output section (second correction memory) 38. .

The estimation memory 22 is provided in the second radio section 12b
It holds the received field strength data corresponding to the RSSI voltage output from. The multiplex number receiving unit 26b
Outputs a multiplex number indicating the number of transmission channels for the same carrier from the reception main signal. Further, the second correction amount output unit 38 outputs a correction amount corresponding to the multiplex number output from the multiplex number reception unit 26b as a compensation parameter. The second correction amount output unit 38 stores a correction amount corresponding to the multiplex number.
It consists of.

The second correction memory unit 38a and the estimation memory 22 may be shared, and in this case, the size of the terminal station 1a can be reduced. As a result, the multiplex number is output from the received main signal in the multiplex number receiving section 26b, and the multiplex number output from the multiplex number receiving section 26b is output in the second correction amount output section 38 (second correction memory 38a). The corresponding correction amount is input to the correction unit 23 as a compensation parameter.

Also, the compensation parameter output unit 6 a sends the correction field to the correction unit 23 and the received electric field strength data estimated first by the estimation memory 22 and the multiplexed output from the second correction amount output unit 38. The number is converted into a correction amount and each is input. With such a configuration, one of the terminal stations 1a code-multiplexes and transmits an RF signal including the multiplex number and transmitted data to the base station 2a. The RF signal is frequency-converted into a baseband signal by the second radio unit 12b in the base station 2a, and the baseband unit 36a performs logic processing required for reception under the control of the main control unit 14b.

The multiplex number is read from the decoding section 20 by the multiplex number receiving section 26b, and the read multiplex number is input to the second correction memory 38a. On the other hand, the RS output from the RSSI detector 32k of the second radio unit 12b
The SI voltage is stored in the estimated memory 2 by the memory control unit 37.
2, the RSSI is primarily estimated, and the held data is input to the correction unit 23, and the correction unit 23 corrects the RSSI with the correction mat read from the decoding unit 20.

As a result, the RSSI detection error caused by the difference in the number of multiplexed reception main signals, which is included in the logarithmic amplifier of the RSSI detector 23, is compensated. As described above, it is possible to improve the RSSI detection accuracy in the base station 2a while saving power and simplifying the terminal station 1a. (B) Description of the Second Embodiment of the Present Invention The wireless communication system 3b (see FIG. 1) according to the second embodiment uses a CDMA system and supports a plurality of modulation systems. An example of the system 3b is a mobile phone service, which includes a base station 2b corresponding to a plurality of types of modulation schemes and a modulation scheme corresponding to the base station 2b in a wireless communication zone of the base station 2b. Terminal station 1b that communicates with base station 2b using the desired modulation method
It is configured with and.

Here, the base station 2b receives a compensation parameter in addition to the information data and control data transmitted from the terminal station 1b, and based on the compensation parameter,
The SSI is corrected. The base station 2b is accommodated in an exchange 4a having an exchange function, and can exchange data with the network 4b. Further, the terminal station 1b transmits the modulation parameter to the base station 2b together with data to be transmitted composed of information data such as voice or file data and control data. The function of the terminal station 1b is realized by, for example, a software defined radio.

FIG. 11 is a block diagram of a transmitting section of the terminal station 1b according to the second embodiment of the present invention. The terminal station 1b shown in FIG. 11 is, for example, a mobile phone, and includes an antenna 11a, a first wireless unit 12a, and a baseband unit 36b.
And a main control unit 14a. Here, the baseband unit 36b generates a signal to be transmitted according to the control of the main control unit 14a, and
Performs a logical operation necessary for inputting the data into the data generator 17 and the compensation parameter generator 5b.
, A coder section 16 and a modulation section 25.

Here, the compensation parameter generator 5b
It outputs an intercept factor according to the modulation method and a correction amount according to the intercept factor, and includes an intercept factor determining unit (which is indicated as determined) 40a and a memory 40b. . The intercept factor is a statistical parameter when designing a system specification, and specifically corresponds to a modulation method.

This intercept factor determining section 40a
Determines the intercept factor according to the modulation method, and generates a read address of the memory 40b according to the determined intercept factor. Further, the memory 40b stores a correction amount corresponding to the intercept factor determined by the intercept factor determining unit 40a as a compensation parameter.
The correction amount is stored as information in the form of a table for each difference in intercept factor (difference in modulation method). Then, the correction amount is read based on the read address output from the intercept factor determination unit 40a, and is input to the coder unit 16.

That is, the compensation parameter generator 5b
Generates information on the modulation scheme as a compensation parameter necessary for correcting an RSSI detection error that may occur in the terminal station 1b due to a difference in signal waveform depending on the modulation scheme of the base station 2b. This information means a correction amount according to the modulation method (intercept factor).
Therefore, the multimode compatible terminal station 1b can be supported.

It is to be noted that, other than these, those having the same reference numerals as those described above have the same or similar functions, and therefore, duplicated description will be omitted. Accordingly, the terminal station 1b superimposes the intercept factor corresponding to the modulation method or the correction amount corresponding to the intercept factor on the data to be transmitted, and transmits the data.

On the other hand, the base station 2b is provided with a correction table memory for outputting a correction amount according to the modulation method, and the correction amount according to the received intercept factor is used to calculate
The detected RSSI is corrected. FIG. 12 is a block diagram of a transmission unit of the base station 2b according to the second embodiment of the present invention. The main part of the transmission unit in the base station 2b shown in FIG. 12 includes an antenna 11b, a second radio unit 12b, a baseband unit 36b, and a main control unit 14b.

Here, the baseband unit 36b performs a necessary logical operation on the baseband signal output from the second radio unit 12b under the control of the main control unit 14b. It comprises a parameter output section 6b, a correction section (reception electric field strength correction section) 23, and a data demodulation section 21. The compensation parameter output unit 6b includes an estimation memory 22 and a modulation parameter output unit (displayed as output) 21.
c and a third correction amount output unit 39 (third correction memory 39a)
It is configured with and. Here, the modulation parameter output section 21c outputs a modulation parameter indicating a modulation method from the received main signal.

The third correction amount output unit 39 outputs a correction amount corresponding to the modulation parameter output from the modulation parameter output unit 21c as a compensation parameter. The third correction amount output unit 39 is configured by a third correction memory 39a that holds a correction amount corresponding to a modulation parameter. Therefore, it is possible to improve RSSI detection accuracy in the base station 2b while simplifying the terminal station 1b and saving power.

It is to be noted that, other than these, those having the same reference numerals as those described above have the same or similar functions, and therefore, duplicated description will be omitted. With such a configuration, first, the terminal station 1b communicates with the base station 2b using the first modulation scheme, and then changes the base station 2b to a second modulation scheme different from the first modulation scheme. To transmit data to be transmitted.

Further, the terminal station 1b notifies the base station 2b of a correction amount according to the difference in the modulation scheme (intercept factor), and the base station 2b corrects the RSSI detection error. The base station 2b can correct even if an RSSI detection error occurs due to a difference in the used modulation scheme. Further, the terminal station 1b calculates the correction amount from the intercept factor, and notifies the base station 2b of only the correction amount. In this case, the base station 2b can be simplified and downsized.

Therefore, even if the terminal station 1b is a software defined radio, the accuracy of RSSI detection can be greatly improved. For example, the presence or absence of radio waves transmitted by an illegal radio can be determined with high accuracy based on RSSI. It is possible to estimate. As a result, for example, it is possible to crack down on illegal radios with extremely high performance. (B1) Description of Modification of Second Embodiment In a modification of the second embodiment, the base station 2 (2a, 2
Instead of the correction memory (the first correction memory 19, the second correction memory 38a, the third correction memory 39a, etc.) for outputting a correction amount according to the number of multiplexed transmission channels received by b),
It is corrected by an operation using a calculation formula. That is, RS
SI is obtained by a predetermined operation. Also in this modification, the system 3b using the CDMA scheme (see FIG. 1) is applied, and the terminal station 1b and the base station 2b are used respectively.

Here, the memory control unit 37 shown in FIG.
Is configured to output received field strength data by a predetermined calculation based on RSSI. In addition, terminal station 1,
1a (see FIGS. 2 and 10) can also be used.
With such a configuration, first, the RSSI detection unit 32k converts the RSSI into the RSSI voltage,
After the SSI voltage is A / D converted, it is notified to the main control unit 14b. The main control unit 14b primarily estimates the received electric field strength (RSSI # 1) according to the RSSI voltage from the estimation memory 22. Separated. Further, in the main control unit 14b, the reception electric field strength (RSSI # 2) to be obtained is obtained by the following equation (3) using (RSSI # 2) estimated by the estimation memory 22.

RSSI # 2 = RSSI # 1 + (A * n + B) (3) where n represents the number of multiplexes received by the multiplex number receiving unit 26b, and both A and B are coefficients. Yes, * represents multiplication. In this way, RSSI can be corrected,
A correction amount is obtained by calculation from the number of multiplexed transmission channels,
By correcting the RSSI by the correction amount, the RSSI detection error caused by the difference in the number of multiplexed transmission channels is compensated.

Therefore, a memory for estimating the RSSI corresponding to the output voltage of the RSSI detector 32k is not required, and the amount of correction can be obtained with higher accuracy than when a memory is used. It is possible to compensate for the RSSI detection error caused by the difference in the number of multiplexed transmission channels with high accuracy. (C) Others The present invention is not limited to the above-described embodiment and its modifications, and can be variously modified and implemented without departing from the gist of the present invention.

As described above, the wireless communication system 3 (3
a, 3b) use the CDMA system, but the present invention provides, for example, GSM (Global System for Mobile Com
munications). As for the spreading method, not only direct spreading but also a method of switching the transmission frequency in the IF signal band can be used. Further, regarding the modulation circuit, the baseband signal output from the data generation unit 17 is converted into an IF signal by the modulation unit 25 and up-converted into an RF signal by the first radio unit 12a. Up-conversion may be directly performed by the unit 17. Similarly, at the time of demodulation, the baseband signal may be directly obtained by downconverting the RF signal.

The received electric field intensity data input to the received electric field intensity correction unit 23 includes digital values of voltages,
Pointers and the like can also be used. For example, another memory is provided in the data demodulation unit 21 and the correction unit 23, and a pointer to the memory is input to the correction unit 23. Even if such a modification is used, the advantage of the present invention is not impaired at all.

The first correction amount output unit 26a is configured as an electric field intensity correction amount extraction unit that extracts and outputs a correction amount from a received main signal, and also extracts an electric field intensity correction amount from another signal, for example. You can also. In addition, the enable number counter 30 shown in FIG.
It is also possible to use a logic circuit combining the binary counter 30a and the decoder 30b, or to combine the n-ary counter 30c and the flip-flop 30d.

Further, in each of the embodiments and the modified examples, the terminal station 1 (1a, 1b) is connected to the base station 2 (2a, 2b).
b) can be transmitted multiple times. For example,
When the base station 2 (2a, 2b) broadcasts information on the modulation scheme, it broadcasts each time the modulation scheme is changed. Also, the correction amount and the multiplexing number according to the transmission channel multiplexing number are notified at regular intervals using a timer or the like because the multiplexing number frequently changes.

Further, the systems described in each embodiment can be implemented in combination. For example, the terminal station 1 (1a, 1b) has a multi-mode function to support the TACS + CDMA system,
The detection error of RSSI caused by the difference between the signal waveforms generated in each of the S system and the CDMA system, and CD
It is possible to compensate for RSSI detection errors caused by the difference in the number of multiplexed transmission channels in the MA system.

Further, in the frame shown in FIG. 6, the position for inserting the compensation parameter can be variously changed. In FIG. 7, data generation units 17a, 17b,
17c are the same as the data generation unit 17, and are respectively the transmission data generation units 17-1 and 17-
2, transmission data generation units 17-3 and 17-4, and transmission data generation units 17- (n-1) and 17-n.

(D) Supplementary Note (Supplementary Note 1) A data generation unit for generating and outputting data to be transmitted including control data and information data, and detection of a received electric field strength on the receiving side due to a difference in signal waveform. A compensating parameter generator for outputting a compensating parameter used for error correction, the compensating parameter output from the compensating parameter generator, and the data to be transmitted output from the data generator And a first radio section for converting the coded data output from the coder section into a radio frequency and outputting a radio signal. A terminal station for a wireless communication system.

(Supplementary note 2) The terminal station for a wireless communication system according to supplementary note 1, characterized in that the coder unit is configured to perform encoding using a code for identifying the own station and the other station. . (Supplementary Note 3) The compensation parameter generation unit detects and outputs a multiplex number indicating the number of transmission channels for the same carrier, and corresponds to the multiplex number output from the multiplex number detection unit. 3. The terminal station for a wireless communication system according to claim 2, further comprising: a first correction memory that holds a field intensity correction amount as the compensation parameter.

(Supplementary Note 4) The multiplex number detection unit includes a plurality of holding units that hold the enable signal, a first counter that outputs a channel number corresponding to the enable signal, and a signal that is output from the first counter. An address output unit that outputs addresses of the plurality of holding units corresponding to the channel numbers; and a second counter that counts the number of the enable signals held in each of the plurality of holding units. 4. The terminal station for a wireless communication system according to claim 3, wherein:

(Supplementary note 5) The wireless communication according to supplementary note 4, wherein the multiplex number detection unit is configured to output an enable number for each channel group obtained by dividing a plurality of transmission channels. Terminal for the system. (Supplementary Note 6) The multiplex number that the multiplex number detecting unit holds the multiplex number based on an address that is output from the data generation unit and that is composed of a combination of enable signals indicating on / off of a transmission channel for the same carrier. 4. The terminal station for a wireless communication system according to claim 2, wherein the terminal station includes a memory.

(Supplementary Note 7) The compensation parameter generation unit is configured to include a multiplex number detection unit that detects a multiplex number indicating the number of transmission channels for the same carrier and outputs the multiplex number as the compensation parameter. 3. The terminal station for a wireless communication system according to claim 2, wherein: (Supplementary Note 8) The supplementary note according to any one of Supplementary Notes 1 to 7, wherein the compensation parameter generation unit includes a first control unit that inputs the compensation parameter to the coder unit. Terminal station for wireless communication systems.

(Supplementary Note 9) The compensation parameter generating unit determines an intercept factor determining unit that determines an intercept factor according to a modulation scheme, and an electric field intensity correction amount corresponding to the intercept factor determined by the intercept factor determining unit. A terminal station for a wireless communication system, comprising: a memory for holding the compensation parameter.

(Supplementary Note 10) A radio signal including transmitted data and a compensation parameter used for correcting a detection error of a received electric field strength at a receiving side due to a difference in a signal waveform is received. A second radio unit for outputting at least one of a reception main signal obtained by frequency-converting the radio signal and a reception field strength voltage for the radio signal; and the reception main signal output from the second radio unit A decoding unit that outputs a baseband signal caused by the above, a compensation parameter output unit that outputs reception field strength data caused by the reception field strength voltage output from the second wireless unit and the compensation parameter, A correction unit that outputs corrected reception field strength data based on the reception field strength data output from the compensation parameter output unit and the compensation parameter; And a data demodulation unit that outputs demodulated data based on the corrected baseband signal and the corrected received electric field intensity data output from the correction unit. base station.

(Supplementary Note 11) The second radio section is configured to receive a code-division multiplexed radio signal and output at least one of the reception main signal and the reception field strength voltage. 11. The base station for a wireless communication system according to claim 10, wherein (Supplementary Note 12) The compensation parameter output unit includes: an estimation memory that holds reception field strength data corresponding to the reception field strength voltage output from the second wireless unit; 13. The wireless communication system according to claim 11, further comprising a first correction amount output unit that outputs a field strength correction amount corresponding to the multiplex number indicating the number of transmission channels as the compensation parameter. base station.

(Supplementary Note 13) The supplementary note, wherein the first correction amount output unit is configured as an electric field intensity correction amount extraction unit that extracts and outputs the electric field intensity correction amount from the reception main signal. 13. A base station for a wireless communication system according to claim 12. (Supplementary Note 14) The compensating parameter output unit includes: an estimation memory that holds reception electric field intensity data corresponding to the reception electric field intensity voltage output from the second wireless unit; A multiplex number receiving unit that outputs a multiplex number indicating the number of transmission channels; and a second correction amount output unit that outputs a field strength correction amount corresponding to the multiplex number output from the multiplex number receiving unit as the compensation parameter. 13. The base station for a wireless communication system according to claim 11, wherein the base station is configured to include:

(Supplementary note 15) The wireless communication according to supplementary note 14, wherein the second correction amount output unit is configured by a second correction memory that holds the electric field intensity correction amount corresponding to the multiplex number. Base station for the system. (Supplementary Note 16) The compensation parameter output unit is configured to store a reception field strength data corresponding to a reception field strength voltage output from the second radio unit, an estimation memory, and a modulation representing a modulation scheme from the reception main signal. A modulation parameter output unit that outputs a parameter; and a third correction amount output unit that outputs, as the compensation parameter, an electric field intensity correction amount corresponding to the modulation parameter output from the modulation parameter output unit. 13. The base station for a wireless communication system according to appendix 11, characterized in that:

(Supplementary note 17) The wireless communication according to supplementary note 16, wherein the third correction amount output unit is configured by a third correction memory that holds the electric field intensity correction amount corresponding to the modulation parameter. Base station for the system. (Supplementary Note 18) The compensation parameter output unit includes a memory control unit that reads the received electric field intensity data from the estimation memory based on the received electric field intensity voltage and inputs the data to the correction unit. 18. The base station for a wireless communication system according to any one of supplementary notes 10 to 17, wherein

(Supplementary note 19) The wireless communication system according to supplementary note 18, wherein the memory control unit is configured to output the reception field strength data by a predetermined operation based on the reception field strength. base station. (Supplementary note 20) The supplementary note 10 to Supplementary note 10, wherein the second wireless unit is configured to output the reception field strength voltage using an amplifier whose input voltage and output voltage have desired characteristics. 20. The base station for a wireless communication system according to any one of claims 19 to 19.

(Supplementary note 21) The estimation memory is configured to hold the reception field strength data with respect to the reception field strength voltage in consideration of an offset value based on a reference wave having predetermined characteristics. 21. The base station for a wireless communication system according to any one of Supplementary Notes 10 to 20. (Supplementary Note 22) A plurality of terminal stations that transmit and receive a radio signal modulated by a desired wireless communication system, and a base station that communicates with the terminal station, wherein the terminal station transmits control data and information data. A data generating unit for generating and outputting data to be output, and a compensating parameter generating unit for outputting a compensating parameter used for correcting a detection error of the received electric field strength on the receiving side due to a difference in signal waveform A coder for encoding the compensation parameter output from the compensation parameter generator and the data to be transmitted output from the data generator, and outputting encoded data;
A first radio unit that converts the encoded data output from the coder unit to a radio frequency and outputs the radio signal, further comprising: the base station receiving the radio signal; A second radio unit for outputting at least one of a frequency-converted reception main signal and a reception field strength voltage for the radio signal, and a base originating from the reception main signal output from the second radio unit A decoding unit that outputs a band signal, a compensation parameter output unit that outputs reception field strength data resulting from the reception field strength voltage output from the second wireless unit and the compensation parameter, and the compensation parameter A correction unit that outputs corrected reception field strength data based on the reception field strength data output from the output unit and the compensation parameter, the baseband signal output from the decoding unit, Characterized in that it is configured to include a data demodulator which outputs demodulated data based on the outputted corrected received signal strength data from Tadashibu, the wireless communication system.

(Supplementary Note 23) In a wireless communication system including a plurality of terminal stations for transmitting and receiving a radio signal modulated by a desired wireless communication system and a base station for communicating with the terminal station, the terminal station may include one terminal station. Or, a modulation step of modulating data to be transmitted for each of a plurality of transmission channels, and the terminal station corrects the base station for correction of a detection error of a reception electric field strength on a reception side due to a difference in a signal waveform. A compensation parameter acquisition step of acquiring a compensation parameter used for the communication, and the terminal station transmits the data to be transmitted modulated in the modulation step and the compensation acquired in the compensation parameter acquisition step. And a transmitting step of transmitting the coded data by coding the parameters for use in the receiving field.

(Supplementary Note 24) In a wireless communication system including a plurality of terminal stations for transmitting and receiving a wireless signal modulated by a desired wireless communication system and a base station for communicating with the terminal station, the base station is adapted to transmit a signal. A receiving step of receiving a radio signal having a compensation parameter used for correcting a detection error of a received electric field strength on a receiving side due to a difference in waveform, and the base station being received by the receiving step; A detecting step of detecting a received electric field intensity of the radio signal, the base station detecting the compensation parameter included in the radio signal received in the receiving step, and the received electric field detected in the detecting step. A correction step for correcting a detection error of the received electric field strength based on the received electric field strength.

[0138]

As described in detail above, a terminal station for a wireless communication system according to the present invention (Claim 1), a base station for a wireless communication system (Claim 2), a wireless communication system (Claim 3) and According to the receiving electric field strength compensation method (claims 4 and 5), the following effects or advantages can be obtained.

(1) A terminal station generates and outputs data to be transmitted including control data and information data, and a detection error of the received electric field strength on the receiving side due to a difference in signal waveform. A compensation parameter generator for outputting a compensation parameter used for the correction of the compensation parameter, and encoding the compensation parameter output from the compensation parameter generator and the data to be transmitted output from the data generator. The configuration includes a coder unit that outputs encoded data and a first wireless unit that converts the encoded data output from the coder unit to a radio frequency and outputs a radio signal. , The reception field strength error detection is removed, and the terminal station notifies the base station of the correction amount, the multiplexing number, and the modulation scheme itself as compensation parameters. Detected received field strength makes it possible to correct the at Chikyoku (claim 1).

(2) The base station receives the radio signal including the compensation parameter and the transmitted data, and converts the frequency of the radio signal into the received main signal and the received electric field strength voltage of the radio signal. A second radio unit for outputting at least one of them, a decoding unit for outputting a baseband signal resulting from a reception main signal output from the second radio unit, and a reception field strength voltage output from the second radio unit A compensation parameter output unit that outputs reception field strength data and a compensation parameter resulting from the correction, and outputs corrected reception field strength data based on the reception field strength data and the compensation parameter output from the compensation parameter output unit. The demodulation data is output based on the correction unit that performs the correction, the baseband signal output from the decoding unit, and the corrected reception electric field intensity data output from the correction unit. For example, when the CDMA system is used, the transmission power level determined by the received electric field strength becomes a more appropriate value. Can be prevented (claim 2).

(3) The radio communication system includes a plurality of terminal stations for transmitting and receiving radio signals modulated according to a desired radio communication system, and a base station for communicating with the terminal stations. , A compensation parameter generation unit, a coder unit, and a first radio unit. The base station further includes a second radio unit, a decoding unit, a compensation parameter output unit, a correction unit, and a data demodulation unit. It is possible to reduce the power consumption of the terminal station and the base station, suppress the decrease in communication quality due to the distance problem, and increase the number of terminal stations that can be accommodated by improving the frequency use efficiency. (Claim 3).

(4) Further, according to the reception field strength compensation method of the present invention, the terminal station modulates data to be transmitted for each of one or a plurality of transmission channels, and the terminal station transmits the data to the base station. On the other hand, a compensation parameter acquisition step of acquiring a compensation parameter used for correction of a detection error of the reception electric field strength on the reception side due to a difference in signal waveform, and a terminal station modulates in a modulation step. And a transmission step of encoding the data to be transmitted and the compensation parameter acquired in the compensation parameter acquisition step, and transmitting the encoded data, thereby simplifying the terminal station and the base station. And the detection accuracy of the received electric field strength can be improved (claim 4).

(5) In addition, according to the reception field strength compensation method of the present invention, the base station is used for correcting the detection error of the reception field strength on the receiving side due to the difference in the signal waveform. A receiving step of receiving a wireless signal having a compensation parameter, and a detecting step in which the base station detects a received electric field strength of the wireless signal received in the receiving step.
The base station includes a correction step of correcting a detection error of the reception electric field strength based on the compensation parameter included in the radio signal received in the reception step and the reception electric field strength detected in the detection step. Because it is composed,
Irrespective of the multiplexing number of the terminal station and the modulation method, it is possible to improve the detection error of the received electric field strength (claim 5).

(6) The coder unit may be configured to perform encoding using a code for identifying the own station and the other station, so that the received electric field intensity can be detected with high accuracy. Subscribers can be increased. (7) A multiplex number detector for detecting and outputting a multiplex number, and a first correction memory for holding a correction amount corresponding to the multiplex number output from the multiplex number detector as a compensation parameter. In this case, information on the number of multiplexes can be detected with a simple configuration.

(8) The multiplex number detecting section includes a plurality of holding sections,
It may be configured to include a first counter, an address output unit, and a second counter. In this case, the circuit operation can be speeded up. (9) The multiplex number detection unit may be configured to output the enable number for each channel group. In this case, for example, the counting operation of the enable signal number becomes unnecessary, and the speed of the multiplex number detection is increased. Can be planned.

(10) The multiplex number detecting section may be provided with a multiplex number memory for holding a multiplex number based on an address composed of a combination of enable signals, and the compensation parameter generating section may determine the multiplex number. A multiplex number detection unit for detecting and outputting the multiplex number as a compensation parameter may be provided. With this configuration, the detection of the multiplex number can be completed in a short time.

(11) The terminal station may be provided with a first control unit for inputting the compensation parameter in the compensation parameter generation unit to the coder unit. The correction amount can be controlled. (12) The compensation parameter generation unit may include an intercept factor determination unit and a memory,
In this way, a multi-mode compatible terminal station can be supported.

(13) The second radio section may be configured to receive a code-division multiplexed radio signal and output a reception main signal and a reception field strength voltage. The size can be reduced. (14) The compensation parameter output unit may include an estimation memory and a first correction amount output unit.
The first correction amount output unit may be configured as an electric field strength correction amount extraction unit that extracts and outputs a correction amount from a received main signal, so that a special operation in the base station can be unnecessary. , It is possible to correct the detection error of the reception electric field strength.

(15) The compensation parameter output unit may include an estimation memory, a multiplex number reception unit, and a second correction amount output unit, and the second correction amount output unit may include a multiplexing unit. It may be constituted by a second correction memory that holds the correction amount corresponding to the number, and in this case, the size of the terminal station can be reduced. (16) The compensation parameter output unit may include an estimation memory, a modulation parameter output unit, and a third correction amount output unit, and the third correction amount output unit corresponds to the modulation parameter. May be configured by a third correction memory that holds a correction amount to be performed. In this case, it is possible to improve the detection accuracy of the received electric field strength in the base station while simplifying the terminal station and saving power. Can be.

(17) The compensation parameter output unit outputs
A memory control unit may be configured to read the received field strength data from the estimation memory based on the received field strength voltage and input the data to the correction unit, and the memory control unit may perform a predetermined calculation based on the received field strength. It may be configured to output the received electric field strength data. In this case, the detection accuracy of the received electric field strength is also increased.

(18) The second radio section may be configured to output the reception field strength voltage using an amplifier whose input voltage and output voltage have desired characteristics. Circuit components can be diverted, and the versatility of the components can be maintained. (19) The estimation memory may be configured to hold the received field strength data with respect to the received field strength voltage in consideration of an offset value based on a reference wave having a predetermined characteristic. This eliminates the need for complicated calculations, and can reduce the circuit size.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a wireless communication system according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a transmission unit of the terminal station according to the first embodiment of the present invention.

FIG. 3 is a block diagram of a multiplex number detection unit and a data generation unit according to the first embodiment of the present invention.

FIG. 4 is a block diagram of a receiving unit of the base station according to the first embodiment of the present invention.

FIG. 5 is a block diagram of a receiving unit of a second wireless unit according to the first embodiment of the present invention.

FIG. 6 is a diagram illustrating a format example of a transmission frame.

FIG. 7 is a second block diagram of a multiplex number detection unit and a data generation unit according to the first embodiment of the present invention.

FIG. 8 is a third block diagram of a multiplex number detection unit and a data generation unit according to the first embodiment of the present invention.

FIG. 9 is a block diagram of a transmission unit of a terminal station according to a modification of the first embodiment of the present invention.

FIG. 10 is a block diagram of a receiving unit of a base station according to a modification of the first embodiment of the present invention.

FIG. 11 is a block diagram of a transmission unit of a terminal station according to the second embodiment of the present invention.

FIG. 12 is a block diagram of a transmission unit of a base station according to a second embodiment of the present invention.

FIG. 13 is a diagram illustrating an example of characteristics of an input electric field and an output voltage of a logarithmic amplifier.

FIG. 14 is a diagram showing a correspondence between an output voltage and a reception electric field strength.

FIG. 15 is a block diagram illustrating an example of a circuit configuration of a logarithmic amplifier.

FIG. 16 is a diagram illustrating output voltage offset values related to various input signal waveforms.

FIG. 17 is a diagram illustrating an example of characteristics of the number of multiplexes and the received electric field strength detection value in the N-CDMA system.

[Explanation of symbols]

1, 1a, 1b Terminal station 2, 2a, 2b Base station 3, 3a, 3b Wireless communication system 4a Switching station 4b Network 5, 5a, 5b Compensation parameter generation unit 6, 6a, 6b Compensation parameter output unit 11a, 11b Antenna 12a First radio unit 12b Second radio unit 15, 15a, 15b, 36, 36a, 36b Baseband unit 16 Coder unit 17, 17a to 17c Data generation unit 17-1 to 17-n Transmission data generation unit 18, 18a , 18b Multiplex number detector 19 First correction memory 14a, 14b Main controller 20, 20a Decoding unit 21 Data demodulation unit 21c Modulation parameter output unit 22 Estimation memory 23 Correction unit 24 First control unit 25 Modulation unit 26a Correction amount reception unit (First correction amount output unit) 26b multiplex number receiving unit (multiplex number detecting unit) 26c modulation parameter Output unit 30, 33a, 33b, 33c Enable number counter 30a, 30c N-ary counter 30b Decoder 30d, 31a to 31d Flip-flop 32a, 32e Bandpass filter 32b Low noise amplifier 32c, 32f Mixer 32d, 32g Local oscillator 32h Lowpass filter 32i , 32j A / D converter 32k RSSI detector 34 Adder 35 Multiplex ROM 37 Memory controller 38 Second correction amount output unit 38a Second correction memory 39 Third correction amount output unit 39a Third correction memory 40a Intercept factor determination Unit 40b memory 41 frame 41a synchronization signal unit 41b, 41d data signal unit 41c pilot signal unit 41e CRC signal unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Atshiro Hirama 1-2-2, Ichibancho, Aoba-ku, Sendai, Miyagi Prefecture F-term in Fujitsu Tohoku Digital Technology Co., Ltd. F-term (reference) 5K022 EE01 EE11 EE21 EE31 5K067 AA02 CC10 DD27 DD44 EE02 EE10 EE16 FF16 GG09 HH21

Claims (5)

[Claims] 1. A data generating unit for generating and outputting data to be transmitted including control data and information data, and for correcting a detection error of a received electric field strength on a receiving side due to a difference in a signal waveform. A compensating parameter generator for outputting a compensating parameter to be used; encoding and coding the compensating parameter output from the compensating parameter generator and the data to be transmitted output from the data generator A coder unit for outputting encoded data, and a first radio unit for converting the encoded data output from the coder unit to a radio frequency and outputting a radio signal. Terminal station for communication systems. 2. A radio signal including transmitted data and a compensation parameter used for correcting a detection error of a received electric field strength on a receiving side due to a difference in a signal waveform, and receiving the radio signal. A receiving main signal obtained by frequency-converting the signal,
A second radio section for outputting at least one of a reception field strength voltage for the radio signal, and a decoding section for outputting a baseband signal resulting from the reception main signal output from the second radio section; A compensation parameter output unit for outputting reception field strength data derived from the reception field strength voltage output from the second radio unit and the compensation parameter; and the reception output from the compensation parameter output unit. A correction unit that outputs corrected reception field strength data based on the field strength data and the compensation parameter; the baseband signal output from the decoding unit; and the correction reception field strength data output from the correction unit. A base station for a wireless communication system, comprising: a data demodulation unit that outputs demodulated data based on the base station. 3. A mobile station comprising: a plurality of terminal stations for transmitting and receiving a radio signal modulated by a desired radio communication system; and a base station for communicating with the terminal station, wherein the terminal station includes control data and information data. A data generator for generating and outputting data to be transmitted; and a compensation parameter generator for outputting a compensation parameter used for correcting a detection error of a received electric field strength at a receiving side due to a difference in a signal waveform. A coder for coding the compensation parameter output from the compensation parameter generator and the data to be transmitted output from the data generator, and outputting coded data; and A first wireless unit that converts the output coded data to a radio frequency and outputs the radio signal, further comprising: a base station that receives the radio signal and converts the radio signal into a frequency. A second radio unit for outputting at least one of the converted main signal and a received electric field strength voltage for the radio signal; and a baseband caused by the main signal output from the second radio unit. A decoding unit that outputs a signal; a compensation parameter output unit that outputs reception field strength data resulting from the reception field strength voltage output from the second wireless unit and the compensation parameter; and a compensation parameter output. A correction unit that outputs corrected reception field intensity data based on the reception field intensity data output from the unit and the compensation parameter; a baseband signal output from the decoding unit; and a correction unit output from the correction unit. And a data demodulation unit for outputting demodulated data based on the corrected received electric field strength data. 4. A wireless communication system comprising a plurality of terminal stations for transmitting and receiving wireless signals modulated by a desired wireless communication system and a base station for communicating with the terminal stations, wherein the terminal station comprises one or more terminals. A modulation step of modulating data to be transmitted for each transmission channel, and the terminal station corrects the base station with respect to a detection error of a reception electric field strength at a reception side due to a difference in a signal waveform. A compensating parameter acquiring step of acquiring a compensating parameter to be used, the terminal station modulating the data to be transmitted in the modulating step, and the compensating parameter acquired in the compensating parameter acquiring step. And a transmitting step of transmitting the encoded data by encoding the received electric field strength. 5. A wireless communication system comprising a plurality of terminal stations for transmitting and receiving wireless signals modulated according to a desired wireless communication system, and a base station for communicating with the terminal stations, wherein the base station comprises: A receiving step of receiving a radio signal having a compensation parameter used for correcting a detection error of a received electric field strength on a receiving side due to the difference, wherein the base station receives the radio signal received in the receiving step; A detecting step of detecting a reception electric field strength of a radio signal; and the base station, the compensation parameter included in the radio signal received in the reception step, and the reception electric field strength detected in the detection step. And a correction step for correcting the detection error of the reception electric field strength based on the method.