WO2014097420A1 - Wireless communication apparatus - Google Patents

Abstract

The objective of the invention is to record, in a wireless communication apparatus, received data before a reception process and demodulated data after the reception process in such a manner that the received data before the reception process and the demodulated data after the reception process are associated with reception timings of the received data, thereby analyzing, with high precision, the reception conditions of wireless signals at the reception timing level. A signal recording unit (405), while recording, into memory (406), received data (408) from ADC unit (403) at each of a plurality of recording timings, receives, from a reception process unit (404) that demodulates the received data (408), a symbol number (409), which is assigned to the demodulated data that is demodulated by the reception process unit (404), and a demodulated symbol (410) in synchronization with the recording timing. The signal recording unit (405) creates a table (407) for storing the symbol number (409) and demodulated symbol (410) in such a manner that the symbol number (409) and demodulated symbol (410) are associated with the recording timing, and further, the signal recording unit (405) records the received data (408) before the reception process and the demodulated data after the reception process by the reception process unit (404) in such a manner that the received data before the reception process and the demodulated data after the reception process are associated with the reception timing of the received data.

Description

Wireless communication device

The present invention relates to a wireless communication device, and more particularly to a wireless communication device suitable for industrial plants and mobile systems.

In wireless communication devices used in industrial plants and mobile systems, the reception status of wireless signals changes due to various external factors, which are analyzed to analyze the cause of communication failure in detail, or to be stable. It is necessary to take effective measures to ensure that communication is conducted.
The following patent documents 1 to 4 disclose documents describing a technique for analyzing the reception condition of a wireless signal.

The wireless communication device described in Patent Document 1 relates to an inspection device of a wireless section, an inspection system that analyzes and displays inspection results of the wireless section and the wired section, and an inspection apparatus of the wireless section, an inspection of the wireless section and the wired section A technique related to an inspection system that analyzes and displays the result is disclosed, and the I / F unit 110 transmits terminal ID information indicating a communication terminal device to be inspected instructed by the user, and a wireless parameter output from the analysis / display device 400 In the wireless parameter information, there is disclosed a technique of listing each wireless parameter in association with time information.

The wireless communication apparatus described in Patent Document 2 relates to a technology for monitoring a radio wave environment after equipment installation, in a wireless data communication system for performing wireless communication, and a wireless signal received through a receiving antenna 11 is It is disclosed that the time and the reception data measured by the reception side clock means 14 are recorded in the reception side recording means 15 so that the reception time and the content of the reception data can be analyzed later by being demodulated into the reception data. There is.

The wireless communication device described in Patent Document 3 relates to a technology related to a reception characteristic evaluation system that easily acquires measurement data of a wireless reception device and evaluates the reception characteristic thereof, and the measurement data is a decoded test item identification code And the date and time information and the version information, are sent to the maintenance tool 20, and the same measurement data is stored in the measurement data storage unit 21 together with the test item identification code, the date and time information, and the version information. It is shown.

The wireless communication apparatus described in Patent Document 4 relates to a relay station apparatus and a wireless communication method in a wireless communication system that relays wireless communication between wireless stations, and includes a storage unit 12 that stores information received from the wireless station. A technique is disclosed in which, when storing information, the storage unit 12 stores the type of the information and transmission source information that distinguishes the information transmitted from the wireless station in association with the information.

JP 2005-328132 A Japanese Patent Laid-Open No. 9-284236 JP, 2005-142736, A JP, 2011-171849, A

In these prior arts, the communication result and the radio wave environment are basically evaluated on the basis of the demodulated received data, and are obtained by demodulating the data actually received on the receiving side and the data before demodulation. It does not analyze in association with the contents of the demodulated data.
Therefore, based on the reception timing obtained by the demodulation data, the reception condition of the received wireless signal and the cause of the communication failure can not be analyzed with high accuracy, and the cause of the deterioration of the communication quality can not be analyzed accurately. There's a problem.

Therefore, an object of the present invention is to provide a table in which received data before reception processing and demodulated data after reception processing are associated with reception timing of reception data in a wireless reception apparatus that receives a wireless signal and performs reception processing. By recording, it is possible to analyze with high accuracy the reception condition of the received radio signal and the cause of the communication failure.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-mentioned problems. For example, the reception data is stored at each recording timing, and a reception processing unit that demodulates the reception data synchronizes with the recording timing. Signal recording for inputting a symbol number given to demodulated data subjected to demodulation processing and a demodulation symbol specifying the demodulation data, and creating a table for storing the symbol number and the demodulation symbol in correspondence with the recording timing I was equipped with a department.

According to the present invention, the reception data before reception processing, the demodulation data after reception processing, and a table in which the reception timing of the reception data and the bit number of the demodulation data are associated can be recorded in the recording unit. The reception condition of the signal can be analyzed with high accuracy at the reception timing level. Problems, configurations, and effects other than those described above will be clarified by the description of the following embodiments.

FIG. 1 is a diagram showing an example of a mobile system. FIG. 2 shows an example of a mobile system. FIG. 3 is a diagram showing an example of an industrial plant. FIG. 4 is a diagram showing an example of a functional configuration of the wireless reception device. FIG. 5 is a timing chart showing an example of processing operation of the wireless receiving apparatus. FIG. 6 is a table showing an example of processing operation of the wireless receiving apparatus. FIG. 7 is a diagram showing an example of a functional configuration of the wireless reception device. FIG. 8 is a timing chart showing an example of processing operation of the wireless reception device. FIG. 9 is a table showing an example of processing operation of the wireless reception device. FIG. 10 is a diagram showing an example of an appearance configuration of a wireless receiving apparatus. FIG. 11 is a diagram showing an example of a functional configuration of the wireless reception device. FIG. 12 is a timing chart showing an example of processing operation of the wireless reception device. FIG. 13 is a table showing an example of processing operation of the wireless reception device. FIG. 14 is a diagram showing an example of an appearance configuration of a wireless reception apparatus.

In the following embodiment, when it is necessary for convenience, it is divided into a plurality of sections or embodiments. Moreover, in each embodiment, when referring to the number of elements (including the number, numerical value, amount, range, etc.), unless otherwise specified, or in principle when clearly limited to a specific number, etc. The number is not limited to the specific number, and may be more or less than the specific number. In the following embodiments, the constituent elements (including processing steps and the like) are not necessarily essential unless otherwise specified or if it is considered to be obviously essential in principle.

In addition, each configuration, function, processing unit, processing means, and the like in the following embodiments may realize part or all of them as, for example, integrated circuits or other hardware.
Further, each configuration, function, processing unit, processing means, and the like described later may be realized by a program executed on a computer, that is, software. Programs, tables, files, and other information for realizing each configuration, function, processing unit, processing means, etc., memory, hard disk, storage device such as SSD (Solid State Drive), IC card, SD card, storage medium such as DVD, etc. Can be stored in

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In all the drawings for describing the embodiments, members having the same function are denoted by the same or related reference numerals, and the repetitive description thereof will be omitted. Further, in the following embodiments, the description of the same or similar parts will not be repeated in principle unless particularly required.

Example 1
[System configuration]
FIG. 1 shows an example of the overall configuration of the first embodiment in which the wireless communication apparatus of the present invention is applied to a mobile system.
The mobile system includes a communication analysis server 101, a communication analysis result 102 displayed on a display or the like, a terrestrial radio station 103, terrestrial radio relay stations 104 and 105, and dump trucks 106 and 107. The dump trucks 106 and 107 are equipped with onboard radio stations. The communication analysis server 101 and the terrestrial radio station 103 are connected by a communication cable. The terrestrial radio station 103 and the terrestrial radio relay stations 104 and 105 perform radio communications, and the terrestrial radio station 103 and the terrestrial radio relay stations 104 and 105 perform radio communications with the dump trucks 106 and 107. The dump trucks 106 and 107 also communicate with each other by the on-board radio station.

[Process operation / effect]
In the radio communication apparatus according to the present embodiment, in each radio communication in a mobile system between the ground radio station and the ground radio relay station, between the ground radio station and the on-board radio station, and between the on-board radio station and the on-board radio station In addition to the reception data before reception processing and the demodulation data after reception processing, in addition to this, the bit number at the time of decoding the demodulation data is displayed on the display of the communication analysis server 101 in association with the recording timing of the reception data. .
That is, for example, in the terrestrial radio station 103, when the communication analysis server 101 receives the received data via the terrestrial radio relay station 104, the recording timing is set based on the internal clock signal, and this recording timing is set. Each time, the received data is stored in the storage device.
On the other hand, in the reception processing unit of the terrestrial radio station 103, demodulation processing of received data is performed in synchronization with the recording timing, and symbol numbers are demodulated in the order of demodulation for symbols demodulated by the demodulation processing at each recording timing. A demodulation symbol which is added and specifies this symbol is output, and a table in which the symbol number is associated with the demodulation symbol is created for each reception timing.

Communication analysis is performed based on this table, and as shown at 102 in FIG. 1, for example, the result of communication analysis is displayed on the display of the communication analysis server 101.
As in this example, based on the recording timing, the correspondence between the highlighted bit of the demodulated data (in this example, “ABC4” of the demodulation bit string) and the received data at this recording timing is visual. Is displayed on.
As a result, the demodulated data representing the communication result and the received data representing the communication state can be associated with each recording timing determined by the internal clock signal, for example, the level of the received data corresponding to a specific demodulated bit string is significantly reduced. If this is the case, it can be determined at this recording timing that the reception condition is extremely deteriorated.

As a result of such analysis, for example, at the position of the dump truck 106 at a specific recording timing, it is found that there is an obstacle or the like that impedes communication with the terrestrial radio relay station 104 and so on. By arranging or adding a new terrestrial radio relay station, stable communication can be secured over the entire movement range of the dump trucks 106 and 107. Especially in such a mobile system, since the installation location of the ground radio relay station is frequently changed according to the progress of construction, etc., it is possible to monitor the fluctuation of the communication state as described above, and maintain and manage stable communication. Very effective above.

Example 2
[System configuration]
FIG. 2 shows an example of the overall configuration of a mobile unit system according to a second embodiment in which the wireless communication apparatus of the present invention is applied to a railway vehicle operation control system.
The operation control system includes a communication analysis server 201, a communication analysis result 202, a relay device 203, ground radio stations 204, 205, and 206, and a railway train 207. The communication analysis server 201 and the relay device 203 are connected by a communication cable. The terrestrial radio stations 204, 205, and 206 perform radio communication with the on-board radio stations mounted on the railway train 207.

[Process operation / effect]
In the radio communication apparatus according to the present embodiment, in radio communication between the terrestrial radio station and the on-board radio station, the same processing as in Embodiment 1 is performed to thereby obtain demodulated data representing the communication result and received data representing the communication state Can be associated with each recording timing determined by the internal clock signal. By displaying the communication analysis result 202 on the display or the like of the communication analysis server 201 as shown in FIG. 2, the wireless communication state in the operation control system can be analyzed. In particular, in the operation control system of a railway vehicle, it is important to investigate the cause at the time of an accident, and according to the present embodiment, the communication state before and after that is analyzed based on the recording timing to identify the cause of the wireless communication failure. be able to.

[Example 3]
[System configuration]
FIG. 3 shows an example of the overall configuration of an industrial plant according to this embodiment. The industrial plant comprises a communication analysis server 301, communication analysis results 302, plants 303 and 306, and terrestrial radio stations 304 and 305. The communication analysis server 301 and the plant 303 are connected by a communication cable. The terrestrial radio stations 304 and 305 communicate with each other wirelessly.

[Process operation / effect]
The industrial plant according to the present embodiment performs the same processing as in the first embodiment in the radio communication between the terrestrial radio station and the terrestrial radio station, thereby recording timing as shown in the communication analysis result 302 as an example of display. , The correspondence between the highlighted bits of the demodulated data and the received data at this recording timing is visually displayed.
As described above, by visually displaying the highlight data corresponding to a part of the demodulated data and the timing of the corresponding received data, the demodulated data representing the communication result and the received data representing the communication state are displayed. It can correspond.
In particular, in an industrial plant, since there are many metal structures that interfere with wireless propagation, the wireless propagation environment is locally degraded. Therefore, it is important to always check the communication state according to the present invention. It is.

Example 4
[Device configuration]
FIG. 4 shows an example of a more detailed functional configuration of the wireless communication apparatus used for the systems of the first to third embodiments. The wireless communication apparatus shown in FIG. 4 includes an antenna 401, an RF unit 402, an ADC unit 403, a reception processing unit 404, and a signal recording unit 405. The signal recording unit 405 includes a memory 406 and a table 407.
Received data received by the antenna 401 is down-converted by the RF unit 402, subjected to digital sampling processing by the ADC unit 403, and converted into digitalized received data 408. The reception processing unit 404 demodulates the reception data 408 and outputs a symbol number 409 and a demodulation symbol 410.

Here, the symbol number 409 is a serial number given in the order of demodulation for each of the demodulated symbols, and the demodulation symbol 410 is information obtained by the demodulation processing in order to specify the demodulated symbols. It is.
The symbol number 409 and the demodulation symbol 410 are output at the timing when one symbol is demodulated. For example, in the case of QPSK (quadrature phase shift keying), one symbol is configured to assign two bits and four states to a phase of every .pi. / 4, and two bits and four states that are reception data for one symbol are demodulated. Each time, the symbol number is counted up, and the demodulation bit string obtained by the demodulation processing is allocated to every 4 symbol numbers to be a demodulation symbol.

The received data 408 is also input to the signal recording unit 405 and recorded in the memory 406. At this time, each time the received data 408 is recorded in the memory 406 one sample at a time, the recording timing is output to the table 407.
The table 407 stores the recording timing value at that time when the symbol number 409 and the demodulation symbol 410 are input, and stores the symbol number 409 and the demodulation symbol 410 for each recording timing value.
By this series of operations, a table 407 in which the symbol numbers 409 of the demodulated data are associated with the demodulated symbols 410 is created for each recording timing value, and the received data 408 before reception processing is associated with the demodulated data after reception processing. be able to.

[Process operation / effect]
Details of the processing operation example described above are shown in FIG. While recording received data, the timing value synchronized with the clock signal is counted up. The reception processing unit 404 demodulates the reception data, and adds one symbol number 409 and a demodulation symbol 410 to the table when one symbol is demodulated.
Also, the timing value at that time is added to the table. FIG. 6 shows an example of the table, in which three items of the timing value, the symbol number 409 and the demodulation symbol 410 are collected in one row and are recorded in association with each other. For example, it is possible to associate that the symbol number 409 is 1 and the demodulation symbol 410 is 1 + 1 * j at the recording timing of the received data timing of 7. As described above, according to the device configuration according to the fourth embodiment, it is possible to provide a wireless communication device which is highly convenient for a plurality of systems having different purposes of analyzing the state of wireless communication.

[Example 5]
[Device configuration]
FIG. 7 shows a wireless communication apparatus of the fifth embodiment.
The wireless communication apparatus includes an antenna 701, an RF unit 702, an ADC unit 703, an AGC unit 704, a synchronization unit 705, a demodulation unit 706, a decoding unit 707, a reception buffer unit 708, a signal recording unit 709, a table creation unit 710, and signal storage. A section 711 is included.
Received data received by the antenna 701 is down-converted by the RF unit 702, and digitally sampled by the ADC unit 703 to become received data 712 converted into digital data. The AGC unit 704 adjusts the level of the received data 712. The synchronization unit 705 performs frequency synchronization and timing synchronization of the received data 712.

The demodulation unit 706 performs demodulation processing, and outputs symbol information 713 including a symbol number and a demodulation symbol. The symbol number is a sequential number given in the order of demodulation for each of the demodulated symbols, and the demodulation symbol is information obtained by the demodulation process. Symbol information 713 including these is output each time one symbol is demodulated.
The decoding unit 707 performs a decoding process, and outputs the bit number 714 to the table creation unit 710 and the decoded bit 715 to the reception buffer unit 708, respectively. The bit number 714 is a number assigned to the plurality of decoded bits in the decoded order, and the decoded bit 715 is information obtained by the decoding process.

The bit number 714 and the decoded bit 715 are output at the timing when one bit is decoded. The reception buffer unit 708 stores the decoded bit 715. The received data 712 is also input to the signal recording unit 709 and recorded in the memory 716. When the received data 712 is recorded beyond the memory capacity, the memory address controller 717 is provided, and the memory address is cyclically designated by cyclically specifying the memory address.
The memory address controller 717 outputs the recording timing to the table generation unit 710 each time the received data 712 is recorded in the memory 716 one sample at a time. When the symbol information 713 including the symbol number and the demodulation symbol, the bit number 714, and the decoded bit 715 are input, the table generation unit 710 stores the recording timing value at that time, associates these and stores them.

By this series of operations, it is possible to create a table in which received data 712, symbol information 713 including symbol numbers and demodulated symbols, and bit numbers 714 obtained by the decoding process are associated for each recording timing.

[Process operation / effect]
Details of the processing operation example of the fifth embodiment described above are shown in FIG.
While recording the reception data digitally sampled by the ADC unit 403, the timing value synchronized with the clock frequency is counted up. When one symbol is demodulated, the information contained in the symbol information 713 including the symbol number and the demodulated symbol is added to the table. Also, when one bit is decoded, the bit number and the decoded bit are added to the table. Also, the timing value at that time is added to the table as bit timing.

FIG. 9 shows an example of the table. Six items of symbol timing, symbol number, demodulation symbol, bit timing, bit number, and decoded bit are grouped into one line and associated and recorded. For example, when the symbol timing of received data is 7, it corresponds that the symbol number is 1, the demodulation symbol is 1 + 1 * j, the bit timing is 12, the bit number is 1, and the decoded bit is 0. be able to.

FIG. 10 illustrates a configuration example according to the present embodiment, which includes a wireless communication apparatus 1001 and a result display unit 1002. The result display unit 1002 displays the bit string 1003 and the received data 1104, and visually indicates that the bit of the highlighted part in the bit string 1003 is associated with a specific part of the received data 1004. it's shown. This display result can be created based on the table information of FIG. As described above, according to the device configuration according to the fifth embodiment, it is possible to provide a wireless communication device that is highly convenient for a plurality of systems having different purposes of analyzing the state of wireless communication.

[Example 6]
[Device configuration]
FIG. 11 shows a wireless communication apparatus of the sixth embodiment. The wireless communication apparatus illustrated in FIG. 11 includes an antenna 1101, an RF unit 1102, an ADC unit 1103, an AGC unit 1104, a synchronization unit 1105, a demodulation unit 1106, a decoding unit 1107, an error determination unit 1108, a signal recording unit 1109, and a table creation unit 1110. , And a signal storage unit 1111.
Received data received by the antenna 1101 is down-converted by the RF unit 1102, digitally sampled by the ADC unit 1103, and converted into digitalized received data 1112. The AGC unit 1104 adjusts the level of the received data 1112. The synchronization unit 1105 performs frequency synchronization and timing synchronization of the received data 1112.

The demodulation unit 1106 performs demodulation processing and outputs symbol information 1113 including a symbol number and a demodulation symbol. The symbol number is a number given in the order in which the plurality of demodulated symbols are demodulated. The demodulation symbol is information obtained by demodulation processing. Symbol information 1113 including these is output at the timing when one symbol is demodulated. The decoding unit 1107 performs a decoding process and outputs bit information 1115 including a bit number and a decoded bit.
The bit number is a number given in the decoded order to the plurality of decoded bits. The decoded bits are information obtained by the decoding process. Bit information 1115 including these is output at the timing when one bit is decoded. The error determination unit 1108 determines the presence or absence of a bit error of the decoded bit, and outputs the result.

The received data 1112 is also input to the signal recording unit 1109. The input received data 1112 is recorded in the memory 1116. When the received data 1112 is recorded over the memory capacity, the memory address controller 1117 cyclically specifies the memory address to overwrite and record. Also, each time the received data 1112 is recorded in the memory 1116 one sample at a time, the memory address controller 1117 outputs the recording timing to the table generation unit 1110. The table creation unit 1110 receives symbol information 1113 including a symbol number and a demodulated symbol, bit information 1115 including a bit number and a decoded bit, and further receives a notification of a bit error from the error determination unit 1108, and records it. Save the timing values, associate them with each other, and save.
This series of operations creates a table in which received data before reception processing, demodulation data after reception processing, reception timing of reception data, and bit number of demodulation data are associated only when bit error determination is made. can do.

[Process operation / effect]
Details of the processing operation example described above are shown in FIG. While continuing to record received data, the timing value is counted up. When one symbol is demodulated, the symbol number included in the symbol information 1113 and the demodulation symbol are added to the table. Also, when one bit is decoded, the bit number and the decoded bit are added to the table. Also, the timing value at that time is added to the table. Then, when the decoding bit is an error judgment, the added table information is stored. If the decryption bit is determined to be normal, the added table information is discarded. In this way, it is possible to select and save only the information related to the error bit. FIG. 13 shows an example of the table. Six items of symbol timing, symbol number, demodulation symbol, bit timing, bit number, and decoded bit are grouped into one line and associated and recorded. For example, when the symbol timing of received data is 7, it corresponds that the symbol number is 1, the demodulation symbol is 1 + 1 * j, the bit timing is 12, the bit number is 1, and the decoded bit is 0. be able to.

As a result of the processing operation shown in FIG. 12, only information related to error bits is stored in the table shown in FIG. As a result, it is possible to select and select only the information on the cause of the communication error from the huge amount of received data information, and the recording capacity can be significantly reduced.
FIG. 14 shows a configuration example according to the present embodiment, which includes a wireless communication apparatus 1401 and a result display unit 1402. The result display unit 1402 displays the bit string 1403 and the received data 1404, and visually indicates that the location of the error bit in the bit string 1403 is highlighted and is associated with a specific location of the received data 1404. It is displayed on. This display result can be created based on the table information of FIG.
As described above, according to the device configuration according to the sixth embodiment, it is possible to provide a wireless communication device that is highly convenient for a plurality of systems having different purposes of analyzing the state of wireless communication.

101 communication analysis server 102 communication analysis result 103 ground radio station 104, 105 ground radio relay station 106, 107 dump truck 201 communication analysis server 202 communication analysis result 203 relay apparatus 204, 205, 206 ground radio station 207 railway train 301 communication analysis server 302 Communication analysis results 303, 306 Plant 304, 305 Terrestrial radio station 401 Antenna 402 RF unit 403 ADC unit 404 Reception processing unit 405 Signal recording unit 406 Memory 407 Table 408 Reception data 409 Symbol number 410 Demodulation symbol 411 Recording timing 701 Antenna 702 RF Section 703 ADC section 704 AGC section 705 Synchronization section 706 Demodulation section 707 Decoding section 708 Reception buffer section 709 Signal recording section 710 Table preparation section 711 Signal storage section 712 Received data 7 13 symbol information 714 bits (number) (information)
715 decoded bit 716 memory 717 memory address controller 1001 wireless communication device 1002 result display unit 1003 bit string 1004 received data 1101 antenna 1102 RF unit 1103 ADC unit 1104 AGC unit 1105 synchronization unit 1106 demodulation unit 1107 decoding unit 1108 error determination unit 1109 signal recording unit 1110 Table creation unit 1111 Signal storage unit 1112 Received data 1113 Symbol information 1115 Bit information 1116 Memory 1117 Memory address controller 1401 Wireless communication device 1402 Result display unit 1403 Bit string 1404 Received data

Claims (9)

From the reception processing unit that stores received data at each recording timing and performs demodulation processing on the received data, specifies the symbol number assigned to the demodulated data that has been subjected to demodulation processing and the demodulation data in synchronization with the recording timing And a signal recording unit for generating a table for storing the symbol number and the demodulation symbol in correspondence with the recording timing. The wireless communication apparatus according to claim 1, wherein the reception processing unit outputs the symbol number and the demodulation symbol to the table at a timing at which one symbol of the reception data is demodulated. The wireless communication apparatus according to claim 1, wherein the symbol number is a number added in the order in which the received data is demodulated. The reception processing unit includes a composite unit that combines the demodulated data subjected to demodulation processing, and outputs the demodulated symbols to the table at timings at which one symbol of reception data before the reception processing is demodulated. 4. The wireless communication apparatus according to claim 3, wherein the bit number of the decoded bit is output to the table at the timing when the unit decodes one bit. 5. The wireless communication apparatus according to claim 4, wherein the bit number is assigned in the order of decoding each time the decoding unit decodes one bit. The signal recording unit includes a memory controller and a memory, and the memory controller cyclically designates an address at which the memory records the received data in accordance with the reception timing, and the reception timing is the table. 5. The wireless communication apparatus according to claim 4, wherein the wireless communication apparatus outputs the table to a table creation unit that creates the table. The table creation unit that creates the table records the reception timing as a symbol timing when the symbol number and the demodulation symbol are input from the demodulation unit, and the bit number and the decoded bit from the decoding unit 5. The wireless communication according to claim 4, wherein the reception timing is recorded as a bit timing when the is input, and the symbol timing and the bit timing are stored in a table in correspondence with the recording timing. apparatus. The reception processing unit has an error determination unit, and when the symbol timing and the bit timing are output, the error determination unit determines whether the decoded bit is an error or not, and the determination result is The wireless communication apparatus according to claim 4, wherein the wireless communication apparatus outputs the table to the table creation unit. The table creation unit records the symbol timing, the symbol number, the demodulation symbol, the bit timing, the bit number, and the decoded bit only when the error determination result is a bit error, and the error determination result is 9. The wireless communication apparatus according to claim 8, wherein, if normal, the symbol timing, the symbol number, the demodulation symbol, the bit timing, the bit number, and the decoded bit are discarded.

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