JP2001024629A - Receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform a processing, in comparison with the previous processing by a receiver to process a data signal to follow a unique word signal by timing based on the received unique word signal. SOLUTION: A unique word signal received in a prescribed period is detected by a detecting means 16, signals received in this period are stored temporarily by storage means F1 to Fn, a data signal (signal of a first data path) to follow the unique word signal is processed by the timing, based on the unique word signal according to a fact that the unique word signal is detected by the detecting means 16 by a first processing means 20, a data signal is discriminated as to whether it is included in a signal (signal of a second data route) stored in the storage means F1 to Fn according to the fact that no signal is detected as a detected result by the detecting means 16, and the detected data signal is processed by a second processing signal 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver for processing a data signal that follows a unique word signal at a timing based on the received unique word signal, and more particularly to a receiver for realizing more efficient processing than in the past. About the machine.

[0002]

2. Description of the Related Art For example, TDMA (Time Division Multip
In a communication system adopting the “le Access” method, a master station device and a slave station device communicate using a predetermined frame.
Specifically, first, the master station device transmits a frame to the slave station device, and the slave station device follows the frame (establishes synchronization with the master station device by the frame) to perform various communication. Perform the operation.

Here, a unique word signal (UW) composed of, for example, a predetermined pattern is included in the above-mentioned frame.
The unique word signal has a role of specifying the head position of the data signal and a role of establishing frame synchronization. In the slave station device, the timing of all operations is determined based on the reception timing of the unique word signal transmitted from the master station device. Therefore, T
In order for communication by the DMA method to be performed normally, it is necessary to establish and maintain synchronization with high accuracy.

FIG. 5 shows an example of a communication system employing the above TDMA system and an example of a frame used for communication. The communication system shown in FIG. 1 includes a master station device 31 and a slave station device 32. Communication between these devices 31, 32 is performed using the frame shown in FIG. As the master station device 31 and the slave station device 32, for example, a fixedly installed device may be used, or a movable device may be used.

As shown in FIG. 1, a frame (one frame) used for communication includes, for example, a guard time signal (GT), a bit synchronization signal (PR), a unique word signal, and a data signal adjacent to each other. The communication is performed by arranging a plurality of frames having the same configuration continuously. In the drawing, as an example, a frame having a frame number of (m-1), a frame having an m number, and a frame having a frame number of (m + 1) are shown. Further, a burst header signal is composed of a guard time signal, a bit synchronization signal, and a unique word signal.

FIG. 6 schematically shows an example of a circuit configuration of the slave station device 32 described above. In the slave station device 32 shown in the figure, an error detection code (for example, CRC) addition unit 53 and an error correction code addition unit 5 provided in the control unit 43 are provided.
4 and the signal processed by the burst header addition circuit 55 are amplified by the amplifier 51 provided in the radio section 42 and transmitted wirelessly from the antenna 41. In the slave station device 32, a signal wirelessly received by the antenna 41 is transmitted to the wireless unit 42.
The unique word detection circuit 56 and the error correction unit 57 which are amplified by the amplifier 52 provided in the
And an error detection unit 58.

[0007] In the communication system as described above, in order to establish and maintain the synchronization with high accuracy, the slave station device 32 is required.
Generally performs the following processing with emphasis on detection of reception of a unique word signal. That is, for example, erroneous synchronization due to erroneous detection of a unique word signal is prevented by limiting the number of times a unique word signal is detected until it is determined that synchronization has been established (backward protection). To maintain the state of synchronization by limiting the number of consecutive non-detection of a unique word signal until it is determined that the word has been lost (forward protection), or to detect the reception time of the unique word signal (UW
The detection window is limited to cope with fluctuations in the reception timing of the unique word signal.

In the above communication system, for example, since wireless communication is performed, an error may occur in a data signal or the like including a unique word signal. Then, an error correction process and an error detection process are performed on the data signal. In addition,
For example, if an error occurs in the unique word signal,
Even when the slave station device 32 receives the unique word signal, the unique word signal may not be normally detected.

Here, as a process performed by the slave station device 32 of the communication system as described above, a process of detecting a received unique word signal using a UW detection window will be described in detail. For example, when communication is performed using continuous frames as shown in FIG. 5, the slave station device 32 follows the frame timing (synchronization established and maintained by past frames). , It is possible to determine the next unique word signal reception timing (for example, the UW detection reference position shown in FIG. 7A described later). However, in actual communication, the reception timing of the unique word signal may fluctuate due to, for example, fading or multipath.

Therefore, the slave station device 32 detects the unique word signal received before and after the UW detection reference position including the UW detection reference position determined based on the following frame timing. The window is set. FIG. 7A shows an example of the next frame determined based on the frame timing followed by the slave station device 32, and an example of the UW detection reference position and the UW detection window for the frame. is there.

For example, as shown in FIGS. 7 (b) and 7 (e), the receiving position of the unique word signal (the position indicated by the dotted line in the drawing) is earlier than the UW detection window. If it is late, the slave station device 32 does not detect the unique word signal. On the other hand, for example, FIG.
As shown in FIG. 7 and FIG. 7D, when the reception position of the unique word signal falls within the UW detection window, the slave station device 32 detects the unique word signal, and the detection is triggered. As a (trigger), reception processing (for example, error correction processing or error detection processing) of a data signal that follows the unique word signal is performed.

Here, in the slave station device 32, for example, when a unique word signal is received earlier than the UW detection reference position as shown in FIG. The reception processing of the data signal is performed in response to the detection, but when it is not detected that the unique word signal has been received up to the UW detection reference position, for example, as shown in FIG. By continuing to maintain synchronization in accordance with the following frame timing (flywheel operation), the same reception processing as described above is started on the assumption that a unique word signal or data signal has been received at the scheduled reception timing. I do. The reason for starting such a receiving process is, for example, that the UW
This is because it is difficult to predict the detection of the reception of the unique word signal after the detection reference position.

In the slave station device 32, for example, when a unique word signal received after the UW detection reference position is detected as shown in FIG. Then, in order to perform a reception process on a data signal that follows the unique word signal at a timing based on the actually received unique word signal, the reception process is restarted. Note that the processing for resetting the reception processing includes, for example, all the circuits (for example, the error correction unit 57 and the error detection unit 5) located downstream of the UW detection circuit 56.
In step 8), the data being processed is discarded.

[0014]

However, in the slave station device 32 as described above, when it is not detected that the unique word signal has been received up to the UW detection reference position as described above, the UW detection reference position is not detected. Since the above-described reception processing has been started on the assumption that the unique word signal has been received, the reception processing is reset as described above, for example, when a unique word signal is received in the UW detection window after the UW detection reference position. And the receiving process must be started again. For this reason, there is a problem that the processing is complicated and the configuration of the receiving circuit for performing the processing is also complicated.

The present invention has been made to solve such a conventional problem. When processing a data signal that follows a unique word signal at a timing based on a received unique word signal, for example, as described above. It is an object of the present invention to provide a receiver that can realize efficient processing even if a unique word signal is received after the UW detection reference position.

[0016]

In order to achieve the above object, a receiver according to the present invention processes a data signal that follows a unique word signal at a timing based on the received unique word signal as follows. I do. That is, the detecting means detects the unique word signal received in the predetermined period, the storage means temporarily stores the signal received in the period, and the first processing means detects the unique word signal by the detecting means. The second processing means processes the data signal following the unique word signal at a timing based on the unique word signal, and stores the data signal in the storage means in response to the detection result by the detection means not being detected. It is determined whether or not the data signal is included in the detected signal, and the detected data signal is processed.

Therefore, when detecting a unique word signal received during a predetermined period, the signal received during the period is temporarily stored, and the stored signal is stored in response to no detection result. , So that, for example, an efficient process can be realized as compared with the conventional configuration in which the reception process is started when the reception of the unique word signal is not detected up to the UW detection reference position. Can be.

Further, the receiver according to the present invention has the following configuration as a preferred embodiment. That is, the data signal is arranged adjacent to the unique word signal,
The period includes a reception timing of a unique word signal determined based on synchronization established in the past with a communication partner, and the storage unit temporarily stores a signal received in a period subsequent to the reception timing. I do.

Therefore, the reception timing of the unique word signal determined based on the synchronization established in the past with the communication partner, that is, the unique word signal expected when the synchronization is assumed to be maintained. Since the signal received in a period subsequent to the reception timing is temporarily stored, for example, when the synchronization is actually maintained, the signal from the beginning of the data signal can be stored.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described with reference to the drawings. FIG. 1 schematically shows a circuit configuration example of a communication device to which a receiver according to the present invention is applied. The communication device shown in the figure can be used, for example, as a slave station device of a communication system similar to that shown in FIG. In the communication device of the present embodiment, for example, FIG.
TDMA using a frame having the same configuration as that shown in FIG.
By the communication, wireless communication such as a unique word signal and a data signal is performed with the master station device.

The communication apparatus of the present embodiment shown in FIG. 1 includes an antenna 1 for transmitting and receiving a radio signal, a radio unit 2 for amplifying a signal to be transmitted and received, and a control unit 3 for processing a signal to be transmitted and received. Is provided. The wireless unit 2 includes an amplifier 11 for amplifying a signal to be transmitted and an amplifier 12 for amplifying a received signal. For example, the wireless unit 2 amplifies a signal to be transmitted input from the control unit 3 and wirelessly transmits the signal from the antenna 1 or amplifies a signal wirelessly received by the antenna 1 and outputs the signal to the control unit 3. Do.

The control section 3 includes an error detection code addition section 13, an error correction code addition section 14, and a burst header addition circuit 15 as a circuit on the transmission side, and a UW detection circuit as a circuit on the reception side. A circuit 16, a reception data adjustment circuit 17, a register section 18, a reception processing operation timing generation circuit 19, and a reception processing circuit 20 are provided. Further, the reception processing circuit 20 includes, for example, an error correction unit 21 and an error detection unit 22.

The error detecting code adding section 13 has a function of adding an error detecting code to the data signal to be transmitted and outputting the data signal to the error correcting code adding section 14. In this example,
For example, CRC (cyclic check character) is used as the error detection code, but any code may be used as the error detection code. The error correction code adding section 14 has a function of adding an error correction code to the data signal input from the error detection code adding section 13 and outputting the data signal to the burst header adding circuit 15. Note that any code may be used as the error correction code.

A burst header adding circuit 15 adds a burst header signal composed of a guard time signal, a bit synchronization signal, and a unique word signal to the data signal input from the error correction code adding section 14, and applies these signals to the radio section 2. It has the function of outputting to

FIG. 2 shows an example of a more detailed circuit configuration of the reception data adjustment circuit 17 provided as the above-mentioned reception-side circuit. Referring to FIG. 2 and FIG. A configuration example and an operation example of the circuit will be described. The UW detection circuit 16 has a function of detecting a unique word signal from a received signal input from the wireless unit 2 to detect the received unique word signal. The UW detection circuit 16 of this example detects a unique word signal received in the UW detection window using, for example, a UW detection window similar to that shown in FIG. 7A.

When the UW detection circuit 16 detects the received unique word signal in the UW detection window,
The timing based on the unique word signal is determined by a switch SW provided in the reception data adjustment circuit 17, an error correction unit 21 and an error detection unit 22 provided in the reception processing circuit 20.
It has the function of notifying to. In this example, the timing based on the unique word signal is used as the timing based on the unique word signal, for example.
For example, various timings may be used according to the circuit configuration and the like.

In this example, the UW detection circuit 16
The detecting means for detecting the unique word signal received within a predetermined period according to the present invention by detecting the received unique word signal in the W detection window is configured. In the present example, as a preferable mode, in this period (the UW detection window in the present example), the synchronization previously established with the communication partner (the master station device in the present example) (for example, the synchronization established by the past frame). The reception timing of the unique word signal calculated based on the synchronization (in this example, FIG. 3A described later)
UW detection reference position shown in the figure). In this example,
The period (UW detection window in this example) is configured by combining equal periods before and after the UW detection reference position. Note that the predetermined period may be arbitrarily set according to, for example, the usage status of the device.

The reception data adjusting circuit 17 has a first data path used when a unique word signal is detected and a second data path used when a detection result of the unique word signal is not detected. And a switch SW for switching these paths. Here, for example, the switch SW normally keeps a state of being switched so as to output a signal from the second data path to the reception processing circuit 20, while notifying the detection timing of the unique word signal from the UW detection circuit 16 described above. First depending on what is done
Has a function of switching to output the signal from the data path to the reception processing circuit 20.

The first data path includes, for example, k buffers B1 to Bk connected in series, and delays a reception signal input from the radio unit 2 by passing through the buffers B1 to Bk. It has the function of outputting to the switch SW later. Each of the buffers B1 to Bk, for example, synchronizes with a clock (CLK) used in a circuit on the receiving side, and transmits a signal input from a buffer in the preceding stage (however, in the case of the buffer B1 in the first stage, the radio unit 2) to the next stage (However, in the case of the last-stage buffer Bk, the switch SW), the received signal is sequentially shifted to the right in FIG. 2, for example.

As described above, when the received unique word signal is detected in the UW detection window, the switch SW
As a result, the signal from the buffer Bk at the last stage is output to the reception processing circuit 20. In this example, the signal from the head of the data signal is output from the buffer Bk at the last stage to the reception processing circuit 20 in this case. , The delay time in the first data path is set.

The delay time as described above is, for example, U
The setting is made in consideration of a delay (for example, a fixed delay value of hardware) caused by a processing time in the W detection circuit 16, a switching timing of the switch SW, and the like. Further, as the number k of stages of the buffer, a number capable of realizing such a delay time is set.

In this example, in response to the detection of the unique word signal received by the UW detection circuit 16 as described above, a data signal that follows the unique word signal at a timing based on the unique word signal is received as described later. A first process of processing a data signal that follows the unique word signal at a timing based on the unique word signal in response to detection of the unique word signal by the detection means according to the present invention by processing by the processing circuit 20 Means are configured.

The second data path includes, for example, n serially connected buffers F1 to Fn having the same function as that provided in the first data path. (n-2) -th stage buffer Fn-2 or (n
-1) Changeover switches S1, S2 and S3 are provided between the output terminal of the buffer Fn-1 of the stage and the buffer Fn of the stage n and the switch SW to switch on and off respectively. In this example, by turning on only one of these changeover switches S1 to S3, a signal from any one of the three buffers Fn-2 to Fn is output to the switch SW. Is possible. In this example, as an example, a case is shown in which the switch S1 is turned on to output a signal from the (n-2) th stage buffer Fn-2 to the switch SW.

Here, in the present embodiment, the on / off switching of the changeover switches S1 to S3 is controlled by the register section 18 and the reception processing operation timing generation circuit 19. The reception processing operation timing generation circuit 19 is, for example, a register unit 1
8, the changeover switches S1 to S3
And a function of notifying the error correction unit 21 and the error detection unit 22 of the reception processing circuit 20 of the processing start timing. Note that the processing start timing is set to, for example, a point in time when it is determined that a unique word signal is not detected in the UW detection window. In this example, the processing start timing is the same (or almost the same). At the timing, the switch S1 is switched from off to on.

The register section 18 sets, for example, which one of the changeover switches S1 to S3 is to be turned on, that is, which one of the buffers Fn-2 to Fn outputs a signal from the switch SW. Has a function. As described above, the setting for outputting the signal from the buffer (Fn-2) of the (n-2) th stage to the switch SW is performed in the register unit 18 of the present example, and the above-described reception processing operation timing The generation circuit 19 controls the switches S1 to S3 according to the setting.

With such a configuration, the second data path of the present embodiment transmits the received signal input from the radio unit 2 to (n-2) when no unique word signal is detected in the UW detection window. It has a function of outputting a signal delayed by passing through the buffers F1 to Fn-2 of the stage to the switch SW. In this example, in this case, the delay time in the second data path is set so that the signal from the UW detection reference position is output to the reception processing circuit 20 from the (n-2) th stage buffer Fn-2. Have been.

That is, specifically, in this example, the reception from the UW detection reference position to the end position of the UW detection window (in this example, for example, the right half period of the UW detection window shown in FIG. 3 described later) is received. Signal length and (n-2) -stage buffer F1
ＦFn−2 so that the length of the signal (received signal) temporarily stored is the same.

In this embodiment, the (n-2) -stage buffers F1 to Fn-2 provided in the above-mentioned second data path transmit received signals in the period from the UW detection reference position to the end position of the UW detection window. By temporarily storing the signal, a storage unit that temporarily stores the signal received during the period according to the present invention is configured. In this example, as a preferred embodiment,
The storage means (the buffers F1 to Fn-2 in this example) stores the unique word signal reception timing (U in this example) determined based on the synchronization established in the past with the communication partner.
(W detection reference position), and temporarily stores a signal received in a subsequent period.

As described above, the signals temporarily stored by the storage means according to the present invention are not necessarily all the signals received during the predetermined period according to the present invention, but may be all of the signals received during the period. It may be a part. In the case where only a part of the signal received during the predetermined period according to the present invention is temporarily stored by the storage means as described above, it is highly likely that a data signal is included in the UW signal as in this example. Although it is preferable to store only a signal portion following the detection reference position, a signal portion to be temporarily stored may be arbitrarily set according to, for example, a communication state with a communication partner.

In this example, as described above, the register section 18 is set to output the signal from the (n-2) th stage buffer Fn-2 to the switch SW. It is also possible to make settings for outputting a signal from another buffer (in this example, the buffer Fn-1 or the buffer Fn) to the switch SW. If the setting of the register section 18 is made variable in this way, even if the width of the UW detection window is changed in accordance with, for example, the use condition of the apparatus, the setting of the register section 18 can be changed only. The delay time in the data path 2 (that is, the number of buffers existing between the radio unit 2 and the switch SW) can be adjusted, which is efficient.

For example, when the UW detection circuit 16 detects a unique word signal, the error correction unit 21 provided in the reception processing circuit 20 detects the received data based on the timing notified from the UW detection circuit 16. It has a function of performing error correction processing on a data signal input from the first data path via the switch SW of the adjustment circuit 17 using an error correction code added to the data signal, and outputting the result to the error detection unit 22.

When the UW detection circuit 16 does not detect the unique word signal, for example, the error correction section 21 performs the reception data adjustment circuit 17 based on the timing notified from the reception processing operation timing generation circuit 19.
Has a function of subjecting a signal input from the second data path via the switch SW to error correction processing using an error correction code added to the signal and outputting the result to the error detection unit 22. As described above, any code may be used as the error correction code.

For example, when the UW detection circuit 16 detects a unique word signal, the error detection unit 22 provided in the reception processing circuit 20 performs error correction based on the timing notified from the UW detection circuit 16. It has a function of performing error detection processing on the data signal input from the unit 21 using an error detection code added to the data signal.

When the UW detection circuit 16 does not detect a unique word signal, the error detection section 22 receives an input from the error correction section 21 based on the timing notified from the reception processing operation timing generation circuit 19. And a function of performing error detection processing on the resulting signal using an error detection code added to the signal. As described above, in this example, for example, CRC (cyclic check character) is used as the error detection code, but any code may be used as the error detection code.

Here, the reception processing circuit 20 of the present embodiment
When the unique word signal is not detected by the detection circuit 16, a function is provided for determining whether or not the signal subjected to the error detection processing is a data signal based on the result of the error detection processing by the error detection unit 22 described above. are doing. More specifically, for example, if there is an error in the signal as a result of the error detection processing, it is determined that the signal subjected to the error detection processing is not a data signal. It is assumed that the signal subjected to the error detection processing is a data signal, that is, the data signal is received at a reception timing determined based on the following frame timing (synchronization established and maintained by a past frame). And that the signal subjected to the error detection processing is a data signal.

As described above, in the present embodiment, a signal having no error as a result of the error detection processing is determined as a data signal, so that the reliability that the signal is a data signal is ensured in accordance with the accuracy of the error detection processing. be able to. In this example, whether to use a signal without error as a data signal may be arbitrarily set, for example, at the time of system design or the like according to the use state of the system. For example, if it is set to use as a data signal, a signal without error is used as a data signal.For example, if it is set to discard an error-detected signal even if there is no error, Retransmission processing is performed.

In this example, the unique word signal is not detected by the UW detection circuit 16 as described above (that is, the detection result is not detected) and is stored in the second data path. By processing the detected data signal by determining whether the data signal is included in the detected signal or not, the data is stored in the storage means in accordance with the fact that the detection result by the detection means according to the present invention was not detected. Second processing means is configured to determine whether the data signal is included in the detected signal and process the detected data signal.

In the present example, the detected data signal is a signal determined to be a data signal as a result of the error detection processing. Further, as a method of processing the detected data signal, for example, not only the signal can be used as a data signal, but also the mode of discarding the signal as described above can be adopted.

As described above, in the communication apparatus according to the present embodiment to which the receiver according to the present invention is applied, the communication apparatus according to the present embodiment performs a predetermined period (in this example, UW
When detecting the received unique word signal (within the detection window), the signal received during the period is temporarily stored by the second data path, and the detection result is determined based on the fact that the detection result was not detected. Since it is determined whether or not the stored signal contains a data signal, for example, a reception process is started when it is not detected that a unique word signal has been received up to the UW detection reference position. Efficient processing can be realized compared to the configuration

Further, in the communication apparatus of the present embodiment, as a preferable mode, the reception timing (in this example, the UW detection reference position) of the unique word signal which is determined based on the synchronization established in the past with the communication partner, is set at a subsequent position. The signal received during the time period is temporarily stored in the second data path. For example, when the synchronization is actually maintained, the signal from the beginning of the data signal can be stored. It is efficient.

Here, referring to FIG. 3 and FIG. 4, the reception processing (for example, error correction processing and error detection processing) performed by the communication apparatus of the present embodiment and the conventional communication apparatus (for example, the child apparatus shown in FIG. By comparing the reception processing performed by the station apparatus 32), the advantage of using the communication apparatus of the present example will be described.

FIG. 3A shows an example of the next frame calculated based on the frame timing followed by the communication apparatus of the present example, and an example of the UW detection reference position and the UW detection window for the frame. Is shown. FIG. 3 (b)
9 shows an example of a process performed when a unique word signal received earlier than the UW detection reference position is detected as a similar process between the communication device of the present embodiment and the conventional communication device. In this case, as shown in the figure, in the communication device of the present example and the conventional communication device, the detection of the received unique word signal triggers the reception process of the data signal.

FIGS. 3C to 3E show an example of processing performed by a conventional communication device. That is, FIG. 3C shows an example of a process performed when a unique word signal received at a time later than the UW detection reference position is detected. The data signal receiving process is performed when the detected unique word signal is detected. Also, in this case, the conventional communication device follows the signal as shown in FIG. 3D in response to not detecting that the unique word signal has been received up to the UW detection reference position. The receiving process of the signal received in the subsequent period from the UW detection reference position is started according to the frame timing.

Then, in the conventional communication device, FIG.
After the signal reception process is started as shown in (d), when a unique word signal received later than the UW detection reference position is detected as shown in FIG.
As shown in (e), it is necessary to perform a transfer process such as resetting the receiving process and restarting the receiving process. In the conventional communication device, such transfer processing is performed, so that the processing is complicated and the configuration of the receiving circuit is also complicated.

On the other hand, FIGS. 3F and 3G show an example of the processing performed by the communication device of this embodiment.
That is, FIG. 3F shows an example of a process performed when a unique word signal received at a time later than the UW detection reference position is detected. In this case, in the communication device of the present example, Detecting the received unique word signal triggers a data signal reception process. Here, the processing shown in FIG. 3 (f) is the same as the conventional processing shown in FIG. 3 (c), for example. However, in the communication device of this example, if the unique word signal is not detected, the UW detection is performed. No signal reception processing is performed until the window period elapses.

That is, in the communication device of the present embodiment, when it is not detected that the unique word signal has been received up to the UW detection reference position, the signal received in the subsequent period from the UW detection reference position is temporarily stored. And then U
When the unique word signal is not detected in the W detection window, the stored signal is subjected to reception processing as shown in FIG. 3 (g) (that is, the processing timing is shifted as compared with the conventional method). Let me do).

As described above, in the communication device of this embodiment, the detection of the received unique word signal and the reception processing of the data signal performed in accordance with the detection are prioritized in the UW detection window, and the UW detection window When a unique word signal is not detected in the signal, the signal from the temporarily stored UW detection reference position is received and processed.
There is no need to reset the reception process, etc.
The processing can be simplified, the configuration of the receiving circuit (for example, hardware) can be simplified, and the size of the receiving circuit and the device can be reduced.

Although not shown in FIG. 3, FIG. 5, and FIG. 7, the data signal in the frame used for communication by the communication device of the present embodiment includes, as shown in FIG. An error detection code is added. As mentioned above,
In the communication device of this example, when a unique word signal cannot be detected in the UW detection window, the signal from the temporarily stored UW detection reference position is subjected to error detection processing, If there is no error, the signal can be used as a data signal.

FIG. 4B shows a conventional communication device (conventional data processing) and a conventional communication device corresponding to the unique word signal detection result (UW detection result) and the error detection processing result (error detection result). It is shown whether a signal (a data signal or a signal regarded as a data signal) received by the example communication device (the data processing of the present example) can be used.

For example, the received unique word signal is detected in the UW detection window (indicated as “detection” in the figure), and the data signal following the unique word signal has no error (in the figure). In the case of "OK"), both the conventional communication device and the communication device of the present example can use the data signal. Also, for example, the received unique word signal is detected in the UW detection window, and
If there is an error in the data signal following the unique word signal (indicated as “NG” in the figure), both the conventional communication device and the communication device of the present example can use the data signal. No, the data signal is discarded.

If, for example, a unique word signal is not detected in the UW detection window (indicated as "no detection" in the figure), the conventional communication device converts the signal from the UW detection reference position into a signal, for example. Although the signal was discarded even if there was no error, in the communication device of this example, if there was no error in the signal from the UW detection reference position, for example, the signal was May be used as a data signal. Note that, for example, a unique word signal is not detected in the UW detection window and the UW
If there is an error in the signal from the detection reference position, neither the conventional communication device nor the communication device of the present example can use the data signal, and discards the data signal.

Here, in the above embodiment, as a preferred embodiment, the case where the receiver according to the present invention is applied to the slave station device of the communication system adopting the TDMA system has been described. In short, the present invention can be applied to various devices that process a data signal that follows the unique word signal at a timing based on the received unique word signal.

Further, the receiver according to the present invention can be applied not only to a device having only a receiving function but also to a communication device having a transmitting function and a receiving function as shown in the above embodiment. Further, various signals may be used as the unique word signal and the data signal according to the present invention.

The configuration of the receiver according to the present invention is not necessarily limited to the one described in the above embodiment. In short, when a unique word signal received during a predetermined period is detected, Various configurations may be used as long as the signal is temporarily stored and it is determined whether or not the stored signal includes a data signal in response to the detection result being no detection. Can be used.

As an example, the detection means, the storage means, the first processing means, and the second processing means according to the present invention include, for example, a processor executing a control program in a hardware resource including a processor and a memory. And each of these functional units may be configured as an independent hardware circuit, for example. In addition, the present invention can be understood as a computer-readable recording medium such as a floppy disk or a CD-ROM storing the above-mentioned control program. Thereby, the processing according to the present invention can be performed.

[0066]

As described above, according to the receiver of the present invention, a unique word signal received during a predetermined period is detected, and a data signal that follows the unique word signal at a timing based on the unique word signal is detected. When processing is performed, the signal received during the period is temporarily stored, and it is determined whether or not the stored signal includes a data signal in response to the detection result of the unique word signal not being detected. Processing the detected data signal, it is more efficient than the conventional configuration in which, for example, the reception process is started when it is not detected that the unique word signal has been received up to the UW detection reference position. Processing can be realized.

In the receiver according to the present invention, for example, as a preferable mode, the data signal is arranged adjacent to the unique word signal, and the above-mentioned period is based on the synchronization established in the past with the communication partner. It includes the reception timing of the unique word signal that is determined based on the received timing.Since the configuration is such that the signal received during a period subsequent to the reception timing is temporarily stored, for example, when the synchronization is actually maintained, Can store the signal from the beginning of the data signal.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a circuit configuration example of a communication device to which a receiver according to the present invention is applied.

FIG. 2 is a diagram illustrating a more detailed configuration example of a reception data adjustment circuit.

FIG. 3 is a diagram for comparing a communication device according to an embodiment of the present invention with a conventional communication device.

FIG. 4 is a diagram for comparing a communication device according to an embodiment of the present invention with a conventional communication device.

FIG. 5 is a diagram illustrating an example of a communication system employing a TDMA method and an example of a frame used for communication.

FIG. 6 is a diagram illustrating a circuit configuration example of a slave station device according to a conventional example.

FIG. 7 is a diagram illustrating an example of a process of detecting a unique word signal received using a UW detection window.

[Explanation of symbols]

1. Antenna, 2. Radio section, 3. Control section,
11, 12 ··· amplifier, 13 · · · error detection code addition unit,
14. Error correction code adding unit, 15 Burst header adding circuit, 16 UW detection circuit, 17 Received data adjustment circuit, 18 Register unit, 19 Reception processing operation timing generation circuit, 20・ Reception processing circuit
21 ··· Error correction unit, 22 ··· Error detection unit, B1 to B
k, F1 to Fn buffer, SW switch, S
1 to S3 ... switch,

Claims (2)

[Claims] 1. A receiver for processing a data signal that follows a unique word signal at a timing based on the received unique word signal, comprising: detecting means for detecting a unique word signal received during a predetermined period; Storage means for temporarily storing the detected signal, and first processing means for processing a data signal following the unique word signal at a timing based on the unique word signal in response to detection of the unique word signal by the detection means And determining whether the signal stored in the storage means includes a data signal in response to the detection result of the detection means being non-detection, and processing the detected data signal.
A receiver, comprising: 2. The receiver according to claim 1, wherein the data signal is arranged adjacent to the unique word signal, and the period is determined based on synchronization previously established with a communication partner. A receiver including reception timing of a unique word signal, wherein the storage means temporarily stores a signal received during a period subsequent to the reception timing.