JPH0964850A - Radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance a processing speed of error correction and the reliability by surely and quickly conducting the error detection processing. SOLUTION: An error correction addition means 2 provides an error correction code to data to generate coded data, a biphase code conversion means 7 converts the coded data into a biphase code, a radio transmission means 3 modulates the data and sends the result by a radio signal. A radio reception means 5 receives a modulation signal of the same kind as above to provide an output of demodulation data, an error detection means 8 uses the demodulation data as a biphase signal and exclusive OR between bits in pairs is outputted by pairs and the coded data are decoded by arranging bits being a partner of each pair. Furthermore, an error correction means 6 uses the error correction code with decoded data to correct error check.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an error detection and error correction system in a wireless communication system.

[0002]

2. Description of the Related Art In recent years, wireless communication systems for transmitting data wirelessly such as in telemetering have been widely used.

A conventional wireless communication system will be described below. In a conventional wireless communication system, in order to perform error detection and error correction, as shown in Japanese Patent Laid-Open No. 62-298254, error correction coding, parity bit addition, bi-phase coding and They were checking for exclusive OR. Further, in order to improve the reliability, the above-mentioned means have been combined and doubly performed.

FIG. 2 is a block diagram showing a first configuration of a transmitting / receiving apparatus in a conventional wireless communication system. In the figure, the data output from the control means 1 is added with an error correction code by the error correction addition means 2, modulated to a high frequency by the wireless transmission means 3, and transmitted from the antenna 4. Also,
The high frequency wave received by the antenna 4 is demodulated into data by the wireless reception means 5, and the error correction means 6 detects the error and corrects the error when the error occurs. When the error correction is impossible, the error correction means 6 controls the retransmission by the control means 1.
The control means 1 outputs a resend request. Error-free data and error-corrected data are corrected by the error correction means 6
Sent to the control means 1.

FIG. 3 is a block diagram showing a second configuration of a transmitting / receiving apparatus in a conventional wireless communication system. In the figure, the data output from the control means 1 is converted into a biphase code by a biphase code conversion means 7. The bi-phase code is a signal having a falling edge or a rising edge at the center of each bit to be transmitted, and the data "1" is "01" and the data "0" is "1".
It is represented by "0". Therefore, for example, the bi-phase code of 8-bit transmission data "00101100" has a waveform as shown in FIG. The biphase code is modulated to a high frequency by the wireless transmission means 3 and transmitted from the antenna 4. Further, the high frequency waves received by the antenna 4 are demodulated by the wireless reception means 5 into received data. The error detecting means 8 restores the received data from the bi-phase code and detects an error. The bi-phase code can be restored to the original data as it is by judging whether the latter half of each bit is 0 or 1, as shown by the arrow in FIG. Further, the place where an error has occurred can be detected by obtaining the exclusive OR of the first half and the latter half of each bit and obtaining the place where the output becomes 0. When an error occurs, the error detection means 8 requests the control means 1 to resend, and the control means 1 outputs a resend request. The bi-phase code is a code suitable for wireless communication because it forms a data string having no DC component.

[0006]

In such a conventional radio communication system, the method of adding an error correction code requires complicated and time-consuming processing for error detection and error correction. For example, using a BCH code for error correction, 106
If a 21-bit BCH code is added to the bit data, a 3-bit error can be corrected.
It took about 30 msec to process with PU. When the 127-bit (106-bit data + 21-bit BCH code) bit string is communicated at a transmission rate of 9600 bps, it takes about 13 msec. Therefore, the time required for error detection and error correction processing is longer than the communication time. Moreover, when the number of error occurrence bits increases, different data may be restored.

Further, in the method of checking the exclusive OR of the biphase code, the error occurrence location can be detected simply, in a short time, accurately and irrespective of the number of error occurrences only by taking the exclusive OR of the bits. Yes, but because error correction is not possible, 1
Retransmission requests had to be made just because a bit error occurred, and the number of retransmission requests was high.

The present invention solves the above-mentioned problems, and it is possible to promptly detect an error and output a retransmission request, and also to reliably correct an error, thereby achieving both a processing speed and reliability. The purpose is to provide.

[0009]

According to a first aspect of the present invention, there is provided error correction adding means for adding an error correction code to data to generate coded data, and the coded data in the center of one bit. Conversion means for converting to a bi-phase code having a rising or falling edge, a wireless transmission section for modulating the bi-phase code and transmitting it by radio, and a modulated signal of the same type as the modulated signal, and outputs demodulated data. A radio receiving unit, error detection means for outputting an exclusive OR between paired bits by using the demodulated data as a biphase code, and restoring coded data from one of the paired bits, and the restoration coding Error correction means for performing error detection and error correction with an error correction code added to data; and error detection and error correction by the exclusive OR. In a wireless communication system including a wireless transmission / reception device including a determination unit that controls the means and a control unit that controls the operation of the entire device, the determination unit determines that no error is detected by the exclusive OR. 3. The wireless communication system, wherein the processing of the error correction means is not executed, and the rest of the restored encoded data excluding the error correction code portion is output to the control means as valid data. The present invention relates to an error correction adding means for adding an error correction code to data to generate coded data, and a conversion for converting the coded data into a bi-phase code having a leading edge or a trailing edge in the center of one bit. Means, a wireless transmission unit that modulates the bi-phase code and wirelessly transmits it, and receives a modulation signal of the same type as the modulation signal and outputs demodulated data A radio receiving section, error detection means for outputting the exclusive OR between the paired bits by using the demodulated data as a biphase code, and for restoring the encoded data from one of the paired bits, and the restoration code. Error correction means for performing error detection and error correction using the error correction code added to the encoded data, determination means for detecting an error by the exclusive OR and controlling the error correction means, and controlling the operation of the entire apparatus In the wireless communication system including a wireless transmission / reception device including a control unit that performs the detection, the determination unit detects the detection by the exclusive OR, and the number is larger than the number that can be corrected by the error correction unit. At this time, the wireless communication system is such that the processing of the error correction means is not executed and a retransmission request is instructed to the control means. The present invention relates to an error correction adding means for adding an error correction code to data to generate coded data, and converting the coded data into a bi-phase code having a rising or falling edge in the center of one bit. A conversion unit, a wireless transmission unit that modulates the bi-phase code and wirelessly transmits it, a wireless reception unit that receives a modulation signal of the same type as the modulation signal and outputs demodulation data, and a bi-phase code for the demodulation data. As error detection means for outputting the exclusive OR between the paired bits and restoring the encoded data from one of the paired bits, and error detection by the error correction code added to the restored encoded data. Error correction means for performing error correction, judgment means for detecting an error by the exclusive OR and controlling the error correction means, and the entire apparatus In a wireless communication system including a wireless transmission / reception device including a control unit for controlling an operation, the determination unit causes a process of a correction unit to be executed when an error is detected by the exclusive OR, and the exclusion unit The present invention according to claim 4 is a wireless communication system in which a retransmission request is instructed to the control means when the position of the error detected by the logical OR is different from the position corrected by the error detection means. An error correction adding means for adding an error correction code to the data to generate encoded data; a conversion means for converting the encoded data into a bi-phase code having a leading edge or a trailing edge in the center of one bit; A wireless transmission unit that modulates a bi-phase code and wirelessly transmits it; a wireless reception unit that receives a modulated signal of the same type as the modulated signal and outputs demodulated data; Error detection means for outputting the exclusive OR between the pair of bits as the tonal data as the bi-phase code and restoring the encoded data from one of the pair of bits, and the error added to the restored encoded data An error correction means for performing error detection and error correction by a correction code, a determination means for detecting an error by the exclusive OR and controlling the error correction means, and a control means for controlling the operation of the entire apparatus are provided. In a wireless communication system including a wireless transmission / reception device, the determination unit does not execute the process of the error correction unit when the error is detected in the portion of the error correction code by the exclusive OR, and sends the retransmission request. 6. A wireless communication system for instructing control means, and claim 5
The present invention relates to an error correction adding means for adding an error correction code to data to generate coded data, and converting the coded data into a bi-phase code having a rising or falling edge in the center of one bit. A conversion unit, a wireless transmission unit that modulates the bi-phase code and wirelessly transmits it, a wireless reception unit that receives a modulation signal of the same type as the modulation signal and outputs demodulation data, and a bi-phase code for the demodulation data. As error detection means for outputting the exclusive OR between the paired bits and restoring the encoded data from one of the paired bits, and error detection by the error correction code added to the restored encoded data. Error correction means for performing error correction, judgment means for detecting an error by the exclusive OR and controlling the error correction means, and the entire apparatus In a wireless communication system including a wireless transmission / reception device having a control unit for controlling an operation, the determination unit detects an error by the exclusive OR, and the number of errors can be corrected by the error correction unit. The error correction means performs the processing only when the number of the error correction means is within the appropriate number, and the corrected data is controlled as valid data only when the position of the corrected error is the same as the position of the error detected by the exclusive OR. It is a wireless communication system configured to output to a means.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the control means, the error correction addition means, the biphase code conversion means, the error detection means, the error correction means, and the determination means are all processing of a data string, and they are collectively performed It is a means that can be realized by a program processing such as a microcomputer.
In addition, in the error correction means for performing error detection and error correction with the added error correction code, an operation table provided in the storage means may be used for simplifying and speeding up the operation processing.

In the first to fifth aspects, the error correction adding means and the biphase code converting means are ordinary means. The error detecting means treats the demodulated data output of the wireless receiving means as a bi-phase code, outputs the exclusive OR between the paired bits for each pair, and outputs one bit of each pair, usually the latter half of the pair. A bit string in which bits are arranged is output as restored data. The above process is based on the property of the bi-phase code. Further, when the exclusive OR becomes 0, the judging means detects that part has an error. The error correction means is means for performing error detection and error correction processing on the restored data using the added error correction code, and in the embodiment, BC
Although the H code is used for the description, the HCH code is not limited to the BCH.

The feature of the present invention resides in the determination means for combining the error detection processing by the exclusive OR with the error detection and correction processing by the correction code.

In the wireless communication system of the present invention according to claim 1, when the error is not detected by the exclusive OR, the processing of the error correction means, which takes a long time, is not executed, and the restored encoded data is processed. The rest except the error correction code part is immediately output as valid data.
Further, in the wireless communication system of the present invention according to claim 2, an error is detected by exclusive OR, and when the number exceeds the number that can be corrected by the error correction means, retransmission is requested. Further, in the wireless communication system of the present invention according to claim 3, when the error is detected by the exclusive OR, the process of the error correction means is executed, and when the correction position is different from the error detection position by the exclusive OR. Request resend. Further, in the wireless communication system of the present invention according to claim 4, when an error is detected in the error correction code portion by exclusive OR, retransmission is requested. In the wireless communication system of the present invention according to claim 5,
When an error is detected by exclusive OR, and the processing of the error correction means is executed only when the number is within the number that can be corrected by the error correction means, and the correction position matches the error detection position by exclusive OR. Only the corrected result is valid data. Needless to say, the processing of the determination means in the above invention may be included in the processing of the control means.

Examples of the present invention will be described below.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wireless communication system of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of this embodiment. In the figure, the data output from the control means 1 is added with a BCH code of 21 bits for every 104 bits by the error correction addition means 2. This encoding enables error correction up to 3 bits. The data to which the error correction code is added is converted into a biphase code by the biphase code conversion means 7. The bi-phase code is a signal that has a falling edge or a rising edge at the center of each bit of data to be transmitted, and represents "1" of data as "01" and "0" of data as "10". The bi-phase code is modulated by the wireless transmission means 3 to a high frequency of 400 MHz band by the FSK method and transmitted from the antenna 4. Further, the same type of modulated high frequency wave received by the antenna 4 is demodulated by the radio receiving means 5 and becomes demodulated data. The error detecting means 8 uses the demodulated data as a bi-phase code, and a pair of bits "0".
The exclusive OR of the bits in the first half and the latter half of "1" or "10" is obtained, and the place where it becomes 0 is detected as the error occurrence place. That is, if the exclusive OR is 0, "00"
Or, since it is "11", there is an error. The bi-phase code can be restored to the original data as it is by judging whether the latter half of each bit is 0 or 1.

When the error detecting means 8 does not detect an error occurrence portion, the judging means 9 sends the restored data to the control means 1 without the error correcting means 6 processing.
If the number of error occurrence points detected by the error detecting means 8 is 4 or more, the error correcting means 6 determines that the error cannot be corrected, and the judging means 9 requests the controlling means 1 to resend, and the controlling means 1 Output a resend request. When the number of error occurrence points detected by the error detection means 8 is 1 to 3, the error correction means 6 executes the processing to correct the error,
When the error-corrected location matches the error-occurring location detected by exclusive OR, the error-corrected data is sent to the control means 1 as valid data, and the error-corrected location does not match the error-occurring location. At this time, the control means 1 is requested to retransmit, and the control means 1 outputs a retransmission request.

As described above, the error detecting means 8 performs bi-phase coding on the demodulated data to obtain an exclusive OR between the bits forming a pair, and the judging means 9 uses the exclusive OR to determine the error and its location. By detecting and combining the result with the processing of the error correction means, the response time can be shortened and the reliability of error correction can be improved as compared with the case of processing by the error detection means alone.

For example, when a 21-bit BCH code is added to 104-bit data and communication is performed at a transmission rate of 9600 bps, the time from the start of reception to the time when the control means obtains the data is the conventional error correction code addition method. By comparison, the transmission time of 125 bits is 13 mse in the conventional method.
c, error correction processing time is 30msec, total 43ms
It was ec. According to the method of the present invention, the transmission time is doubled to 26 msec because the bi-phase encoding is performed, but the time for obtaining the exclusive OR within the same bit of the bi-phase encoded data is as short as 5 msec.
It was possible to shorten to sec and about 3/4.

Further, when error correction is performed, a double check is performed by checking the correction result at the error position, erroneous correction can be prevented, and data can be obtained with higher reliability.

When an error is detected by exclusive OR, the error correction means executes the processing regardless of the number of errors, and the error correction position is different from the error position detected by exclusive OR. In this case, a resend request may be output. In this case, erroneous correction can be prevented.

Needless to say, even if the number of errors detected by the exclusive OR is within the number correctable by the error correction means, if the error position is the position of the error correction code, the retransmission request may be sent immediately. Yes.

[0022]

As is apparent from the above description, in the wireless communication system of the present invention according to claim 1, an error correction addition means for adding an error correction code to data to generate encoded data, and the code. Conversion means for converting the encoded data into a bi-phase code having a rising or falling edge in the center of one bit, a wireless transmission section for modulating the bi-phase code and transmitting it by radio, and a modulation signal of the same type as the modulation signal. And a radio receiving unit that outputs demodulated data and outputs the exclusive OR between the paired bits using the demodulated data as a biphase code and restores the encoded data from one of the paired bits. Error detection means,
An error correction unit that performs error detection and error correction using an error correction code added to the restored encoded data, a determination unit that detects an error by the exclusive OR and controls the error correction unit, and an entire device In a wireless communication system including a wireless transmission / reception device having a control unit for controlling operation, the determination unit does not execute the process of the error correction unit when no error is detected by the exclusive OR. By outputting the rest of the restored encoded data excluding the error correction code portion to the control means as valid data, a retransmission request can be made without waiting for the processing result of the error correction means. It can output and speed up the processing from error detection to retransmission request. Further, in the wireless communication system of the present invention according to claim 2, error correction adding means for adding an error correction code to data to generate coded data, and the coded data rises or rises at the center of one bit. Converting means for converting into a bi-phase code having a drop, a radio transmitting section for modulating the bi-phase code and transmitting by radio, and a radio receiving section for receiving a modulated signal of the same kind as the modulated signal and outputting demodulated data. And an error detecting means for outputting the exclusive OR between the paired bits by using the demodulated data as a biphase code and restoring the encoded data from one of the paired bits, and adding the restored encoded data. Error correction means for performing error detection and error correction using the generated error correction code, and the error correction means for detecting an error by the exclusive OR. In a wireless communication system including a wireless transmission / reception device including a determination unit that controls the operation of the device and a control unit that controls the operation of the entire device, the determination unit detects the detection by the exclusive OR, and determines the number thereof. Is larger than the number that can be corrected by the error correction means,
By sending a retransmission request to the control unit without executing the processing of the error correction unit, the retransmission request is output without waiting for the processing result of the error correction unit, and error detection is performed. It is possible to speed up the processing from to the resend request and prevent erroneous correction. Further, in the wireless communication system of the present invention according to claim 3, an error correction adding means for adding an error correction code to data to generate encoded data, and the encoded data rises or rises at the center of one bit. Converting means for converting into a bi-phase code having a drop, a radio transmitting section for modulating the bi-phase code and transmitting by radio, and a radio receiving section for receiving a modulated signal of the same kind as the modulated signal and outputting demodulated data. And an error detecting means for outputting the exclusive OR between the paired bits by using the demodulated data as a biphase code and restoring the encoded data from one of the paired bits, and adding the restored encoded data. Error correction means for performing error detection and error correction using the generated error correction code, and the error correction means for detecting an error by the exclusive OR. In a wireless communication system including a wireless transmission / reception device including a determination unit that controls the operation of the device and a control unit that controls the operation of the entire device, the determination unit, when an error is detected by the exclusive OR, By executing the processing of the correction means, and when the position of the error detected by the exclusive OR is different from the position corrected by the error detection means, the retransmission request is instructed to the control means, thereby the error correction means. It is possible to prevent erroneous correction due to. The wireless communication system of the present invention according to claim 4 further comprises error correction adding means for adding an error correction code to the data to generate encoded data,
A conversion unit that converts the encoded data into a bi-phase code having a rising or falling edge in the center of one bit, a wireless transmission unit that modulates the bi-phase code and wirelessly transmits the same, and the same type as the modulated signal. A radio receiving unit that receives a modulated signal and outputs demodulated data, outputs an exclusive logical sum between bits that form a pair using the demodulated data as a biphase code, and outputs encoded data from one of the paired bits. Error detecting means for restoring, error correcting means for performing error detection and error correction by the error correcting code added to the restored encoded data, error detection by the exclusive OR, and controlling the error correcting means In a wireless communication system including a wireless transmission / reception device including a determination unit and a control unit that controls the operation of the entire device, The determining means, when detecting an error in the error correction code portion by the exclusive OR, does not execute the processing of the error correcting means and instructs the control means to send a retransmission request. It is possible to output a retransmission request without waiting for the time-consuming processing result of the error correction means, to speed up the processing from error detection to the retransmission request, and to prevent erroneous correction due to an error in the error correction code portion. Further, in the wireless communication system of the present invention according to claim 5, an error correction adding means for adding an error correction code to data to generate coded data, and the coded data rises or rises at the center of one bit. Converting means for converting into a bi-phase code having a drop, a radio transmitting section for modulating the bi-phase code and transmitting by radio, and a radio receiving section for receiving a modulated signal of the same kind as the modulated signal and outputting demodulated data. Error detection means for outputting the exclusive OR between the paired bits as the demodulated data as a bi-phase code and for restoring the encoded data from one of the paired bits, and for the restored encoded data Error correction means for performing error detection and error correction using the generated error correction code, and the error correction means for detecting an error by the exclusive OR. In a wireless communication system including a wireless transmission / reception device including a determination unit that controls the operation of the device and a control unit that controls the operation of the entire device, the determination unit detects an error by the exclusive OR, and detects the error. The error correction means performs the processing only when the number of error corrections is within the number correctable by the error correction means, and corrects only when the corrected error position is the same as the error position detected by the exclusive OR. The corrected data is output to the control means as valid data, so that the error correction means that takes time only for correction is executed to eliminate wasteful processing time, and the correction result is erroneous. Only the valid data can be reproduced by checking the position.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a transmission / reception device in a wireless communication system of the present invention.

FIG. 2 is a block diagram showing a configuration of a first example of a transmission / reception device in a conventional wireless communication system.

FIG. 3 is a block diagram showing a configuration of a second example of a transmission / reception device in a conventional wireless communication system.

FIG. 4 is a schematic diagram showing the configuration of a biphase code.

[Explanation of symbols]

 1 control means 2 error correction addition means 3 wireless transmission means 4 antenna 5 wireless reception means 6 error correction means 7 bi-phase code conversion means 8 error detection means 9 determination means

Claims (5)

[Claims] 1. An error correction adding means for adding an error correction code to data to generate coded data, and a conversion for converting the coded data into a bi-phase code having a leading edge or a trailing edge in the center of one bit. Means, a wireless transmission unit that modulates the biphase code and wirelessly transmits it, a wireless reception unit that receives a modulation signal of the same type as the modulation signal and outputs demodulation data, and the demodulation data as a biphase code Error detection means for outputting exclusive OR between paired bits and restoring coded data from one of the paired bits, and error detection and error by an error correction code added to the restored coded data Error correction means for performing correction, judgment means for detecting an error by the exclusive OR and controlling the error correction means, and operation of the entire apparatus In a wireless communication system including a wireless transmission / reception device including a control unit that controls
When no error is detected by the exclusive OR, the judging means does not execute the processing of the error correcting means, and the rest of the restored encoded data except the error correcting code part is treated as the valid data and the control is performed. A wireless communication system configured to output to a means. 2. An error correction adding means for adding an error correction code to data to generate coded data, and a conversion for converting the coded data into a bi-phase code having a rising edge or a falling edge in the center of one bit. Means, a wireless transmission unit that modulates the biphase code and wirelessly transmits it, a wireless reception unit that receives a modulation signal of the same type as the modulation signal and outputs demodulation data, and the demodulation data as a biphase code Error detection means for outputting exclusive OR between paired bits and restoring coded data from one of the paired bits, and error detection and error by an error correction code added to the restored coded data Error correction means for performing correction, judgment means for detecting an error by the exclusive OR and controlling the error correction means, and operation of the entire apparatus In a wireless communication system including a wireless transmission / reception device including a control unit that controls
When the detection is detected by the exclusive OR, and the number of detections is larger than the number that can be corrected by the error correction unit, the determination unit does not execute the process of the error correction unit and sends a retransmission request to the control unit. A wireless communication system instructed to. 3. An error correction adding means for adding an error correction code to data to generate encoded data, and a conversion for converting the encoded data into a bi-phase code having a leading edge or a trailing edge in the center of one bit. Means, a wireless transmission unit that modulates the biphase code and wirelessly transmits it, a wireless reception unit that receives a modulation signal of the same type as the modulation signal and outputs demodulation data, and the demodulation data as a biphase code Error detection means for outputting exclusive OR between paired bits and restoring coded data from one of the paired bits, and error detection and error by an error correction code added to the restored coded data Error correction means for performing correction, judgment means for detecting an error by the exclusive OR and controlling the error correction means, and operation of the entire apparatus In a wireless communication system including a wireless transmission / reception device including a control unit that controls
When the error is detected by the exclusive OR, the judging means executes the processing of the correcting means, and when the position of the error detected by the exclusive OR is different from the position corrected by the error detecting means, A wireless communication system for instructing the control means of a retransmission request. 4. An error correction adding means for adding an error correction code to data to generate coded data, and a conversion for converting the coded data into a bi-phase code having a leading edge or a trailing edge in the center of one bit. Means, a wireless transmission unit that modulates the biphase code and wirelessly transmits it, a wireless reception unit that receives a modulation signal of the same type as the modulation signal and outputs demodulation data, and the demodulation data as a biphase code Error detection means for outputting exclusive OR between paired bits and restoring coded data from one of the paired bits, and error detection and error by an error correction code added to the restored coded data Error correction means for performing correction, judgment means for detecting an error by the exclusive OR and controlling the error correction means, and operation of the entire apparatus In a wireless communication system including a wireless transmission / reception device including a control unit that controls
The wireless communication system, wherein the judging means, when detecting an error in a portion of an error correction code by the exclusive OR, does not execute the processing of the error correcting means and instructs a retransmission request to the control means. 5. An error correction adding means for adding an error correction code to data to generate coded data, and a conversion for converting the coded data into a bi-phase code having a leading edge or a trailing edge in the center of one bit. Means, a wireless transmission unit that modulates the biphase code and wirelessly transmits it, a wireless reception unit that receives a modulation signal of the same type as the modulation signal and outputs demodulation data, and the demodulation data as a biphase code Error detection means for outputting exclusive OR between paired bits and restoring coded data from one of the paired bits, and error detection and error by an error correction code added to the restored coded data Error correction means for performing correction, judgment means for detecting an error by the exclusive OR and controlling the error correction means, and operation of the entire apparatus In a wireless communication system including a wireless transmission / reception device including a control unit that controls
The determination means executes the processing of the error correction means only when an error is detected by the exclusive OR, and the number of errors is within the number that can be corrected by the error correction means. A wireless communication system adapted to output corrected data to the control means as valid data only when the position is the same as the position of the error detected by the exclusive OR.