JPH10200445A - Transmission equipment and reception equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the transmission/reception of data at transfer speed as the integer multiple of basic transfer rate without changing any encoding or modulating method at the basic transfer rate by allowing transfer rate to the integer multiple of basic transfer rate, dividing transmission data in the case of high transfer rate, transmitting them as independent channel data and performing reception processing and the synthesization of data as independent channel data on the side of reception. SOLUTION: At CDMA communication equipment (base station) on the side of transmission, the number of bits to be inserted into one frame is prepared for three stages and any stage can be dealt with. Basic station transmission data (input data) are inputted to a frame constitution part 300 and corresponding to a transfer mode signal from a data transfer mode control part 305, the frame constitution part 300 constitutes a prescribed frame. At a data dividing part 301, the framed transmission data are equally divided corresponding to the transfer mode signal from the control part 305 and inputted to modulation blocks 302, 303 and 304.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitting apparatus and a receiving apparatus for a communication system employing a rake (RAKE) system for synthesizing a multipath signal on a receiving side, and more particularly to a CDMA (Code Division Multiple Access; Code). Division Mult
iple Access) It is suitable for application to a transmitting device and a receiving device of a communication system.

[0002]

2. Description of the Related Art In the CDMA communication system, a direct sequence (Direct Sequence Spread Spectrum) in which a signal is spread over a frequency band much wider than a minimum required frequency band to transmit information to be transmitted is transmitted. This is a communication system to which the communication system of the method (1) is applied. A mobile communication system using the CDMA communication system is a communication industry committee of North America (Tea).
lecommunication Industry Association)
The digital communication system has been standardized as −95 and has attracted worldwide attention as a digital communication system that can effectively use the frequency band. IS-95 is described in Reference 1.

[0003] Reference 1 "TIA / EIA INTERIM STANDARD," Mo
bile Station-Base Station Compatibility Standard f
or Dual-Mode Wideband Spread Sprectrum Cellular Sy
stem (IS-95) "] A CDMA communication system identifies mobile stations (users) within the same radio frequency by using a pseudo-random code and a Walsh function and utilizing their orthogonality. I have. Also, to reduce other channel interference,
Four voice data transmission rates (8.6 kbps, 4.0
kbps, 2.0 kbps, 0.8 kbps), but only the case of 8.6 kbps, which is the highest transmission rate defined by IS-95, will be briefly described below.

FIG. 2 is a block diagram showing a configuration of a base station side transmitter (Forward CDMA Channel Structure) specified by IS-95.

[0005] The data transmitted by the base station is decomposed by the frame forming unit 100 into a frame of 172 bits of 20 msec. From the decomposed frame data, C
An error detection information bit is created in RC calculation section 101, and added to information bits (frame data) from frame configuration section 100 in CRC information insertion section 102. The error detection capability on the receiving side is determined by the number of error detection information bits (CRC bits). IS-
In 95, since 12 CRC bits are added, the output of the CRC information insertion unit 102 is 184 bits.

The transmission data to which the error detection information is added is
The signal is input to the convolution encoding unit 103 and is subjected to convolution encoding. Here, a convolutional code with an information rate r = 1/2 and a constraint length K = 8 adds a function of correcting an error (noise) mixed in a wireless channel. The number of output bits of the convolutional encoder 103 is represented by (input bits + K) / r,
In the case of S-95, one frame has 384 bits (symbol).

[0007] The convolutionally encoded transmission data is input to a block interleaving section 104. here,
Data is randomly rearranged in order to obtain an effect of uniformly dispersing burst errors occurring in a wireless channel on the receiving side.

[0008] The output of the block interleaving section 104 is input to a long code encryption section 105. The long code encryption unit 105 includes the long code generation unit 10
The exclusive-or (operation by addition 2) output of the pseudo random code output from 6 and the input code to the long code encryption unit 105 is formed to enhance the secrecy of the transmission data.

In the multiplexing section (multiplexer section) 107,
The mobile station (MS) transmission power control information calculation section 108 embeds the mobile station transmission power control information bits in the encrypted transmission data. The position where the transmission power control information bit is embedded is determined by the pseudo random code output from the long code generator 106.

The output of multiplexing section 107 is Walsh modulating section 1
09 is input. Here, transmission data is spread by replacing the input of one symbol with a Walsh function of 64 bits (chip). The base station assigns one of 64 Walsh functions to transmission to a certain mobile station.

In the quadrature modulator 110, a pseudo random code (short PN code; spreading code) for identifying a base station is used.
And quadrature modulation on input data at an RF frequency (CDMA channel) to output a transmission signal s (t).

In IS-95, a maximum of 63 types of spreading codes are allocated to a communication channel (Tra) in one CDMA frequency band.
ffic Channel1). That is,
It enables connection with up to 63 mobile stations in one CDMA frequency band.

FIG. 3 is a block diagram showing the configuration of a mobile station-side receiver defined by IS-95.

A feature of the IS-95 receiver is that it has three or more independent receiving elements. These receiving elements are called finger elements and have a function of independently receiving and combining multipath signals.

Received signal x (t) = s (t) + n (t)
(N (t) is a noise component) is a finger element 20 composed of a quadrature demodulator 201 and a Walsh demodulator 202.
0, 203 and 205. Each quadrature demodulation unit 201
Then, the transmission signal is demodulated using the same RF channel and pseudo-random code used in the quadrature modulation section 110, and input to the corresponding Walsh demodulation section 202. In each Walsh demodulation section 202, Walsh modulation section 109 decodes a 384-bit transmission symbol using the same code as the Walsh function used at the time of transmission by the base station, and generates a common rake combine section 210.
To enter.

The rake combiner 210 combines the multipath signals from the finger elements 200, 203, and 205 with the same timing. The transmission power control information extracting section 220 extracts transmission power control information bits from the combined signal and supplies the extracted bits to a transmission power control section (not shown). The portion where the transmission power control information bits are extracted from the combined signal is replaced with “0” and input to the long code decoding unit 230. The position of the transmission power control information bit is decoded by long code generation section 240.

In the long code decoding unit 230, the input signal is decrypted by the long code output from the long code generation unit 240 and similar to the long code used by the long code generation unit 240 of the base station at the time of transmission. You.

The signal decrypted by the long code decoding unit 230 is deinterleaved by the deinterleaving unit 250 in the reverse order of the rearrangement on the transmitting side, and the convolutional code decoding unit 260
Returns to the input sequence of.

The convolutional code decoding section 260 corrects an error occurring in a radio channel by using redundant bits included in the data. Generally, a Viterbi decoder is used for decoding a convolutional code. The output of the convolutional code decoder 260 is 184-bit received data.

The received data is transmitted to a CRC calculation / comparison unit 270.
And a CRC symbol calculated from the received data,
By comparing the received frame with the received CRC signal, it is confirmed whether or not there is an error in the received frame. If the CRC calculation / comparison unit 270 determines that there is no error, it determines that the data of 172 bits / frame transmitted from the base station has been correctly decoded.

The decoded frame data is restored by the frame synthesizing section 280 to the data divided into frames.

[0022]

A CD conforming to IS-95 consisting of the transmitter shown in FIG. 2 and the receiver shown in FIG.
The main purpose of the MA communication system is to communicate 172 bits of audio data per frame, and no consideration is given to high-speed data communication of 172 bits or more per frame.

In the future, the mobile station will be used not only for voice communication but also for data communication, and it is expected that more bits of data will be transmitted in one frame time, as in the past. However, the conventional CDMA communication system as described above does not consider high-speed data communication with more than a prescribed number of bits per frame, and cannot respond to this request.

Such a problem occurs not only in the CDMA communication system but also in other communication systems.

Therefore, there is a need for a transmission device and a reception device that can realize high-speed data communication of a prescribed bit or more per frame without changing data communication with the prescribed bit as required.

[0026]

In order to solve the above-mentioned problem, a first aspect of the present invention is an X-ray receiving apparatus for receiving and processing a multipath signal.
A transmitting apparatus for transmitting a transmission signal to an opposing receiving apparatus having a plurality of finger elements includes the following units.

That is, (1) Transfer of the basic transfer rate Y (Y is any one of 1 to X) times the basic transfer rate of the basic transfer rate and an integral multiple of the transfer rate of twice or more and X times or less. A transfer mode signal indicating speed, and Y indicating on,
Transfer mode control means for outputting a total of X operation on / off signals indicating the remaining being off, and (2) frame construction means for dividing input data into frames for each bit number according to the transfer rate indicated by the transfer mode signal (3) data dividing means provided at a stage subsequent to the frame composing means and dividing the input data to itself by Y when the transfer rate indicated by the transfer mode signal is Y times the basic transfer rate; And X modulation processing means for performing modulation processing so that one divided data input from the data division means can be output to the transmission path when the operation on / off signal for the self is on.

A receiving apparatus according to the second aspect of the present invention corresponds to the transmitting apparatus according to the first aspect of the present invention, and includes the following units.

That is, (1) Transfer of Y (Y is any one of 1 to X) times the basic transfer speed of the basic transfer speed and an integer multiple of 2 to X times the basic transfer speed A transfer mode signal indicating speed, and Y indicating on,
The rest are transfer mode control means for outputting a total of X operation on / off signals indicating off, and (2) X finger elements capable of receiving and processing multipath signals, wherein the transfer mode signal controls the basic transfer rate. When instructed, all execute multipath signal reception processing, and when the transfer mode signal indicates Z (Z is 2 or more and X or less) times the basic transfer rate, at least Z signals are independent. (3) Combine the multi-path signals subjected to the same modulation processing among the output signals from each finger element, and indicate the transfer mode signal. Rake combine means for outputting Y channel signals corresponding to the transfer rate; and (4) one channel data input from the lake combine means when the operation on / off signal to itself is on. X demodulation processing means for performing tone processing, (5) data construction means for composing a frame by combining output data from the Y demodulation processing means, and (6) provided after the data construction means. And frame synthesizing means for joining the input frame data.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION

(A) First Embodiment Hereinafter, a first embodiment in which a transmitting apparatus and a receiving apparatus according to the present invention are applied to a CDMA communication system (CDM on the transmitting side)
A communication device and CDMA communication device on the receiving side) will be described in detail with reference to the drawings.

(A-1) Base Station of First Embodiment (CDMA Communication Device on Transmitting Side) FIG. 1 is a block diagram showing the configuration of the base station of the first embodiment. The same, the corresponding part is the same,
Corresponding symbols are attached.

In the case of the first embodiment, 20 msec
The number of bits to be inserted into one frame is prepared in three stages, and any of these stages can be handled. In other words, 172 bits per frame of IS-
A 95 transmission mode, a 344 bit per frame double transfer mode, and a 516 bit per frame triple transfer mode are provided.

Which transfer mode to use is determined, for example, by negotiation before data transmission / reception between the base station and the mobile station. In the base station, the data transfer mode control unit 305 determines the transfer mode. The operation mode of each unit is controlled according to the transfer mode.

Base station transmission data (input data) is input to frame forming section 300, and frame forming section 300
According to the transfer mode signal from the data transfer mode control unit 305, 172 per frame in the IS-95 transmission mode.
A frame is composed of 344 bits per frame in the double transfer mode and 516 bits per frame in the triple transfer mode.

The framed transmission data is equally divided in data division section 301 according to a transfer mode signal from data transfer mode control section 305. That is, I
In the case of the S-95 transmission mode, the frame configuration unit 100
Is output to port 1 as it is. In the case of the double transfer mode, the output data from the frame forming unit 100 is divided into two equal parts and output to the ports 1 and 2 respectively. Here, any of a method of performing the equal halving in the first half and the latter half of one frame, and a method of performing the equal halving by alternately allocating for each bit may be used. In the case of the triple transfer mode, the output data from the frame forming unit 100 is divided into three equal parts, and the divided data is output to the port 1, the port 2 and the port 3, respectively. Here, any of a method of dividing the data into three in the first half, the middle, and the latter half of one frame, or a method of dividing the data into bits for each bit, may be used.

The data output from data division section 301 is input to modulation blocks 302, 303 and 304, respectively. These modulation blocks 302, 303, 30
4 controls on / off of the operation according to the transfer mode signal from the data transfer mode control unit 305. IS-9
In the 5 transmission mode, only the modulation block 302 is operated. In the 2 × transmission mode, the modulation blocks 302 and 30 are used.
3, and in the triple transfer mode, all the modulation blocks 302 to 304 are operated.

Each of the modulation blocks 302, 303 and 304 has a CRC calculation unit 101 as in the above-described conventional case.
To the quadrature modulator 110. FIG.
In FIG. 2, the portion from the interleaving section 104 to the quadrature modulation section 110 in FIG.

Here, each of the modulation blocks 302, 303,
For 304, one Walsh function n, m, l is assigned. That is, when the base station transmits data to a certain mobile station, up to three Walsh functions may be assigned.

As described above, in the base station of the first embodiment, the number of bits per frame is changed in accordance with the set transfer mode, and the frame data is changed every 172 bits as a reference. The divided data is modulated by a number of modulation blocks corresponding to the number of divisions and transmitted.

(A-2) Mobile Station of First Embodiment (CDMA Receiver on Receiving Side) FIG. 4 is a block diagram showing the configuration of the mobile station of the first embodiment. The same, the corresponding part is the same,
Corresponding symbols are attached. The configuration of this mobile station corresponds to the configuration of the base station shown in FIG. That is, the data modulated by the base station shown in FIG. 1 is demodulated.

The received signal x (t) is input to three finger elements 200, 203, and 205 each composed of a quadrature demodulation unit and a Walsh demodulation unit, as in the conventional case, and is subjected to quadrature demodulation and Walsh demodulation. However, each finger element 200,
The difference is that the Walsh functions used in 203 and 205 change depending on the transfer mode. That is, IS-95
In the transmission mode, all Walsh functions are equal (m and l are n), and in the triple transfer mode, all Walsh functions are different, n, m, and l, respectively. In the double transfer mode, at least two Walsh functions are different, n and m, respectively.
When a multipath signal is synthesized by a rake combine operation described later, the remaining Walsh function is n or m.
(Where l is equal to n or m) and the multipath combining is not performed, the remaining Walsh functions are arbitrary.

Each finger element 200, 203, 205
Is output from the rake combiner 403
Is input to The operation of the rake combine is controlled by the controller unit 409 that identifies the transfer mode.

The rake combine unit 403 is an IS-95
In the transmission mode, each finger element 200, 203, 2
The multipath signal output from the port 05 is synthesized and the port 1
Output to In the double transfer mode, the finger element 20
0 and 203 outputs to port 1 and port 2 respectively
Output as is. Alternatively, in the double transfer mode, the third finger element 205 may be assigned to a multipath, and the rake combiner 403 may combine the output with the output of the finger element 200 or 203. In the triple transfer mode, the outputs of the finger elements 200, 203, and 205 are directly output to port 1, port 2, and port 3, respectively.

The output of the rake combiner 403 is input to demodulation blocks 404, 405 and / or 406.
ON / OFF of the operation of each demodulation block 404, 405, 406 is controlled by the controller unit 409. IS
In the −95 transmission mode, only the demodulation block 404 operates. In the double transfer mode, the demodulation blocks 404 and 405 are operated. In the triple transfer mode, all the demodulation blocks 404 to 406 are operated.

Each of the demodulation blocks 404, 405, and 406 includes a transmission power control information extraction unit 220, a long code decoding unit 230, a deinterleave unit 250, a convolutional code decoding unit 260, and a CRC calculation / comparison described in the related art. It comprises a unit 270, and each component operates similarly to a conventional mobile station.

The outputs from the demodulation blocks 404, 405, and 406 are input to a data configuration unit 407, where the data configuration unit 407 forms frame data. The operation of the data configuration unit 407 is controlled by the controller unit 409. In the IS-95 transmission mode, the output from the demodulation block 404 is output to the frame synthesizing unit 408 as it is, and in the double transfer mode, the outputs of the two series of the demodulation blocks 404 and 405 are converted into one series of signals and tripled. In the transmission mode, outputs of three sequences from the demodulation blocks 404 to 406 are converted into one-series signals and output.

The output of the data construction unit 407 is input to the frame synthesis unit 408, and the data divided into frames are joined to form reception data.

As described above, in the mobile station according to the first embodiment, the finger element is operated in a multipath manner or independently in accordance with the set transfer mode, so that one finger addressed to the own station is operated. Or, after obtaining a plurality of divided data, demodulation processing as appropriate, if a plurality of divided,
The data is synthesized to obtain the transmitted data.

(A-3) Effect of First Embodiment As described above, according to the first embodiment, when the transfer rate is set to high, the transmission data is divided and divided. CDMA code and modulate each of these signals for transmission and reception.
It is possible to transmit and receive twice or three times the data of the current IS-95 in the same time without changing the wireless standard.

Since the divided data is transmitted and received using orthogonal spreading even in the transfer of double or triple data, the transfer quality in the IS-95 transmission mode, which is the basic transmission mode, is improved. Almost the same transfer quality can be realized.

Further, the transmitter (base station) of the first embodiment
Can be configured only by adding a data division unit to the current IS-95 configuration, and the receiver (mobile station) side can be configured only by adding the same demodulation block as the current one. It is possible to easily increase the data transfer capacity.

(B) Second Embodiment Next, a second embodiment in which the transmitting apparatus and the receiving apparatus according to the present invention are applied to a CDMA communication system (CDM on the transmitting side)
A communication device and CDMA communication device on the receiving side) will be described in detail with reference to the drawings.

(B-1) Base Station of Second Embodiment (CDMA Transmitter on Transmitting Side) FIG. 5 is a block diagram showing the configuration of the base station of the second embodiment. The same, the corresponding part is the same,
Corresponding symbols are attached.

Also in the second embodiment, the input data is input to the frame forming section 500, and a frame of 20 msec is formed. As in the first embodiment, the number of bits of a frame is determined by a transfer mode signal from the data transfer mode control unit 507. In the case of the second embodiment, the number of bits in one frame in the double transfer mode and the triple transfer mode needs to be exactly twice or three times the number of bits in one frame in the IS-95 transmission mode. Not,
For the reason described later, it is sufficient that the frequency is approximately twice or three times.

The frame data includes a CRC calculator 501.
And error detection information is added by the function of the CRC information insertion unit 502. The number of bits of error detection information to be inserted is
It changes according to the transfer mode. For the information to be sent,
If it is desired to enhance the error detection capability, more error detection bits are inserted, and if error detection is not important, the number of error detection bits is reduced. In the IS-95 transmission mode, 12-bit error detection information is always added. Further, for example, 24-bit error detection information may be added in the double transfer mode, and 36-bit error detection information may be added in the triple transfer mode. In the double transfer mode and the triple transfer mode, When the number of bits in one frame is almost twice or three times the number of bits in one frame in the IS-95 transmission mode, the bits are added so as to be exactly twice or three times after the addition. Is also good.

The data to which the error detection information has been added is subjected to division processing by the data division section 503 according to the transfer mode. In the IS-95 transmission mode, the output of the CRC information insertion unit 502 is output to port 1 as it is. In the double transfer mode, the output of the CRC information insertion unit 502 is divided into two equal parts and output to the port 1 and the port 2 respectively. In the triple transfer mode, the output of the CRC information insertion unit 502 is divided into three equal parts and output to the port 1, the port 2 and the port 3, respectively.

The data output to each port is input to the corresponding modulation block 504, 505 and / or 506, respectively. Each modulation block 504, 505, 506
The on / off operation is controlled by the transfer mode.

The A transmission block 120 constituting the modulation blocks 504, 505 and 506 is the same as that described in the prior art. Modulation blocks 504, 505, 506
May be the same as the one described in the related art. Also, for example, a convolutional code having an information rate r = 1/3 and a constraint length K = 9 may be used. The input of the convolution encoding unit 103 is r × 384
−K so that the preceding frame forming unit 300, CR
The C calculation unit 501, the CRC information insertion unit 502, and the data division unit 503 are configured.

As described above, in the second embodiment, unlike the first embodiment, the processing up to the addition of the error detection information is performed in one sequence, and thereafter, in the double and triple transfer modes, Is divided before modulation and transmission are performed.

(B-2) Mobile Station (CDMA Receiver on Receiving Side) of Second Embodiment FIG. 6 is a block diagram showing the configuration of a mobile station of the second embodiment. The same, the corresponding part is the same,
Corresponding symbols are attached. The configuration of this mobile station corresponds to the configuration of the base station shown in FIG. That is, the data modulated by the base station shown in FIG. 5 is demodulated.

As in the first embodiment, the received signal x (t) is input to three finger elements 200, 203, and 205 each composed of a quadrature demodulator and a Walsh demodulator, and quadrature demodulated and Walsh demodulated. . At this time, the point that the Walsh function used in each finger element 200, 203, 205 changes depending on the transfer mode is also the same as in the first embodiment.

Each finger element 200, 203, 205
Is output from the rake combiner 403
And is processed in the same manner as in the first embodiment. That is, in the IS-95 transmission mode, each finger element 2
The multipath signals output from 00, 203, and 205 are combined and output to port 1, and in the double transfer mode, the outputs of finger elements 200 and 203 are output directly to port 1 and port 2, respectively (or In the double transfer mode, the third finger element 205 is assigned to the multipath, and is synthesized and output with the output of the finger element 200 or 203. In the triple transfer mode, the output of each finger element 200, 203, 205 is output. To port 1,
Output to port 2 and port 3 as they are.

The output of rake combiner 403 is input to demodulation blocks 604, 605 and / or 606.
Also in the second embodiment, each demodulation block 604, 60
The on / off of the operations of 5, 606 is performed by the controller unit 610.
In the IS-95 transmission mode, only the demodulation block 604 is used.
04 and 605 in the triple transfer mode, all demodulation blocks 604 to 606 are operated.

Each demodulation block 604, 605, 606
Is different from the first embodiment, is composed of a transmission power control information extraction unit 220, a long code decoding unit 230, a deinterleave unit 250, and a convolutional code decoding unit 260, which are described in the related art. It operates like a conventional mobile station.

The outputs from the demodulation blocks 604, 605, and 606 are input to a data configuration unit 607, where the data configuration unit 607 forms frame data to which error detection information is added according to the transfer mode. . The operation of the data configuration unit 607 is controlled by the controller unit 610. In the IS-95 transmission mode, the output from the demodulation block 604 is directly used in the double transfer mode, and the two-series output of the demodulation blocks 604 and 605 is converted into a single-series signal.
The output of the three series from 4 to 606 is converted into one series of signals and output to the CRC calculation / comparison section 608.

The CRC calculation / comparison section 608 compares the CRC signal calculated from the input data with the received CRC signal according to the transfer mode, confirms whether or not there is an error in the received frame. Correct it. Thereby, the frame data transmitted from the base station is correctly decoded.

The output of the CRC calculation / comparison section 608 is input to the frame synthesis section 609, and the data divided into frames are connected according to the transfer mode, and the reception data (transmission data) is restored.

As described above, in the mobile station according to the second embodiment, the finger element is operated in a multi-path manner or independently in accordance with the set transfer mode, so that one finger addressed to the own station is operated. Or, after obtaining a plurality of divided data, demodulation processing as appropriate, if a plurality of divided,
The transmission data is obtained by combining them. At this time, the base station side combines data of a plurality of streams (one stream of data) in response to data division performed after adding error detection information. The data may be passed as it is), and error detection and correction operations are performed.

(B-3) Effects of the Second Embodiment According to the second embodiment as well, when the transfer rate is set to a high speed, the transmission data is divided, and the divided signals are respectively subjected to CDMA coding.・ Since transmission and reception are modulated, it is possible to transmit and receive twice or three times the data of the current IS-95 at the same time without changing the current IS-95 modulation standard and wireless standard. become. Further, the configuration of the transmitter (base station) of the second embodiment is the same as that of the current IS.
The configuration of −95 is only slightly changed, and a similar demodulation block is provided on the receiver (mobile station) side, so that the data transfer capacity can be increased very easily.

Even when transferring double or triple data, since the divided data is transmitted and received using orthogonal spreading, the transfer quality in the IS-95 transmission mode, which is the basic transmission mode, is improved. Almost the same transfer quality can be realized.

In addition to this, according to the second embodiment,
By dividing the transmission data after adding an error correction code, error detection can be performed on a frame basis in any transfer mode, and an effect of simplifying transmission / reception processing can be obtained.

When the control of the number of error detection information bits is applied, it is necessary to increase the number of transmission data bits in the double or triple transfer mode or to increase the error detection capability. Can be selected.

(C) Third Embodiment Next, a third embodiment in which the transmitting apparatus and the receiving apparatus according to the present invention are applied to a CDMA communication system (CDM on the transmitting side)
A communication device and CDMA communication device on the receiving side) will be described in detail with reference to the drawings.

(C-1) Base Station of Third Embodiment (CDMA Communication Device on Transmitting Side) FIG. 7 is a block diagram showing the configuration of the base station of the third embodiment. The same, the corresponding part is the same,
Corresponding symbols are attached.

The base station according to the third embodiment performs a series of processes up to the convolutional coding process, and thereafter attempts to divide (or sometimes pass) the data according to the transfer mode. This is different from the second embodiment in which the processing up to the insertion of the CRC information is performed by a series of processing. However, processing from the frame configuration unit 500 to the CRC information insertion unit 502 is the same as in the second embodiment.

The convolutional encoder 703 of the third embodiment
Performs convolutional coding on input data according to the transfer mode (although the number of input bits differs),
In the double transfer mode, an output having twice or three times the number of bits (the number of symbols) as in the IS-95 transmission mode is provided to the data division unit 704.

Now, according to IS-95, the CRC calculation section 501 generates 12-bit error detection information regardless of the transfer mode (regardless of the number of bits of the input frame).
The information rate r = 1/2, the constraint length K
Assume that convolutional coding is performed at = 8. In the triple transfer mode in this case, the frame forming unit 500 uses the IS-95
Number of bits of one frame in transmission mode (172 bits)
One frame is composed of 556 bits, which is more than three times
RC information insertion section 502 outputs 568 (= 556 + 12) bits, and convolution encoding section 703 outputs 1152 ((5
68 + 8) × 2) symbols will be output. That is, at the output stage of the convolutional encoding unit 703, IS-9
This is three times the data amount (384 symbols) of the five transmission modes.

For example, when the base station wants to improve the communication quality with the mobile station, 15-bit error detection information is added, and the convolution coding section 703 causes the information rate r = 1/2 and the constraint length K = 8, convolutional coding may be performed. In this case, all the A transmission blocks 120-1 to 12-12
The maximum transmission speed when using 0-3 is 360 bits / frame.

The output of the convolutional coding unit 703 is input to the data dividing unit 704, and is passed as it is, or is equally divided into two or three according to the transfer mode.

In the IS-95 transmission mode, the output of the convolutional encoder 703 is output to the port 1 as it is. In the double transfer mode, the output of the convolutional encoding unit 703 is divided into two equal parts and output to port 1 and port 2 respectively. In the triple transfer mode, the output of the convolutional coding unit 703 is divided into three equal parts, and output to the port 1, the port 2 and the port 3, respectively.

The output of data division section 704 is input to A transmission blocks 120-1, 120-2, and 120-3, respectively, and is subjected to CDMA modulation in the same manner as in the prior art. The on / off operation of each of the A transmission blocks 120-1, 120-2, and 120-3 is controlled by the data transfer mode control unit 708 as in the above-described embodiment.

(C-2) Mobile Station of Third Embodiment (CDMA Communication Device on Receiving Side) FIG. 8 is a block diagram showing the configuration of a mobile station of the third embodiment. The same, the corresponding part is the same,
Corresponding symbols are attached. The configuration of this mobile station corresponds to the configuration of the base station shown in FIG. That is, the data modulated by the base station shown in FIG. 7 is demodulated.

In FIG. 8, the rake combiner 403
The processing up to is the same as in the second embodiment, and a description thereof will be omitted.

The output of rake combiner 403 is input to demodulation blocks 801, 802 and / or 803.
Also in the third embodiment, each demodulation block 801, 80
The on / off operation of the operation 2 and 803 is performed by the controller unit 806.
In the IS-95 transmission mode, only the demodulation block 801 is used.
01 and 802, and all the demodulation blocks 801 to 803 are operated in the triple transfer mode.

Each demodulation block 801, 802, 803
Is the transmission power control information extraction unit 2 described in the related art.
20, a long code decoding unit 230 and a deinterleave unit 250, and each component operates in the same manner as a conventional mobile station. The demodulation block 801 connected to the output port 1 of the rake combiner 403, in other words, the demodulation block 80 that is always turned on during communication.
1 further includes a data configuration unit 804 and a convolutional code decoding unit 805.

The outputs of the demodulation blocks 801, 802, and 803 from the deinterleave unit 250 are input to the data configuration unit 804, and the data configuration unit 804 converts the convolutionally encoded frame data according to the transfer mode. Be composed. The operation of the data configuration unit 804 is controlled by the controller unit 806. In the IS-95 transmission mode, the output from the deinterleave unit 250-1 is left as it is in the double transfer mode.
The output of two sequences of 50-1 and 250-2 is converted into a signal of one sequence, and in the triple transmission mode, the deinterleave unit 2
The output of three series from 50-1 to 250-3 is converted into a single series of signals and output to convolutional code decoding section 805.

The convolutional code decoding section 805 decodes the convolutional code according to the transfer mode, and supplies the decoded frame detection data to the CRC calculation / comparison section 608.

Thereafter, in the CRC calculation / comparison section 608 and the frame synthesis section 609, the received data (transmitted data) is restored by performing the same processing as in the mobile station of the second embodiment according to the transfer mode.

As described above, in the mobile station according to the third embodiment, the finger element is operated in a multi-path manner or independently in accordance with the set transfer mode, so that one finger addressed to the own station is operated. Or, after obtaining a plurality of divided data, demodulation processing as appropriate, if a plurality of divided,
The transmission data is obtained by combining the data. At this time, the base station side combines the data of a plurality of sequences (corresponding to the fact that the data is divided after the convolutional coding) In some cases, the convolutional code is decoded.

(C-3) Effect of Third Embodiment Also in the third embodiment, when the transfer rate is set to a high speed, the transmission data is divided, and the divided signals are respectively divided into CDMA codes.・ Since transmission and reception are modulated, it is possible to transmit and receive twice or three times the data of the current IS-95 at the same time without changing the current IS-95 modulation standard and wireless standard. become. Further, the configuration of the transmitter (base station) according to the third embodiment is the same as that of the current IS.
The configuration of −95 is only slightly changed, and a similar demodulation block is provided on the receiver (mobile station) side, so that the data transfer capacity can be increased very easily.

[0091] Even when transferring double or triple data, since the divided data is transmitted and received using orthogonal spreading, the transfer quality in the IS-95 transmission mode, which is the basic transmission mode, is improved. Almost the same transfer quality can be realized.

In addition to this, according to the third embodiment,
By using a stronger error correction and error detection code for the convolutional encoder and the CRC calculator, the data communication quality can be improved.

Also, a CRC calculation unit, a CRC information insertion unit,
Since the convolutional encoder is realized by one pass, the configuration of both the base station and the mobile station can be simplified as compared with the first and second embodiments.

(D) Fourth Embodiment Next, a fourth embodiment (a CDMA communication device on the transmission side) in which the transmission device according to the present invention is applied to a CDMA communication system will be briefly described with reference to the drawings.

FIG. 9 is a block diagram showing the configuration of the base station according to the fourth embodiment, where the same and corresponding parts as those in the above-mentioned drawings are denoted by the same reference numerals. .

In the base station according to the fourth embodiment, the configuration up to the data division unit 704 is the same as that of the base station according to the third embodiment. As each transmission block to which the output of data division section 704 is provided, B transmission blocks 130-1 to 130-3 including interleave section 104 to Walsh modulation section 109 in FIG. 2 are applied. In other words, the B transmission block 1 without the quadrature modulator 110
30-1 to 130-3 are applied. The on / off operation of each of the B transmission blocks 130-1, 130-2, and 130-3 is controlled by the data transfer mode control unit 902, as in the above-described embodiment.

In the case of the fourth embodiment, the output of each of the B transmission blocks 130-1, 130-2, and 130-3 is input to a signal synthesizing unit 901, and is synthesized by the signal synthesizing unit 901. Here, each B transmission block 130-1, 1
30-2 and 130-3 have different Walsh functions n,
Since m and l are assigned, the respective outputs are orthogonal to each other, and even if they are combined, the orthogonality is maintained and demodulation can be performed on the receiver (mobile station) side.

The output of the signal synthesizing unit 901 is
10, the quadrature modulation unit 110 generates a pseudo random code (short PN code; spreading code) for base station identification.
Then, the input data is subjected to quadrature modulation at an RF frequency (CDMA channel) and output as a transmission signal.

Note that the configuration of the mobile station according to the third embodiment described above can be applied to the configuration of the mobile station corresponding to the base station of the fourth embodiment.

According to the fourth embodiment, the third embodiment is also applicable.
The same effect as the effect of the embodiment can be obtained.
In addition, according to the fourth embodiment, orthogonal modulation is performed after the outputs after Walsh modulation are combined, so that the number of orthogonal modulation units required by the base station can be reduced to one.

(E) Other Embodiments In each of the above embodiments, an example has been described in which the present invention is applied to a communication system in which the base station is on the transmitting side and the mobile station is on the receiving side. Of course, it can be applied. Also, it goes without saying that the present invention is applicable to communication systems other than the mobile communication system.

In each of the above embodiments, the maximum selectable transfer rate is three times the basic transfer rate. However, the present invention is not limited to this. For example, if the number of finger elements in the receiving device is N, the maximum selectable transfer rate may be set to N times the basic transfer rate. Even if the number of finger elements in the receiving device is N, the maximum selectable transfer rate can be made smaller than N times the basic transfer rate. Conversely, if the maximum selectable transfer rate is M times the basic transfer rate, the receiving device needs to have at least M finger elements.

Further, in each of the above embodiments, the plurality (three) of the modulation blocks and the demodulation blocks are dedicated blocks for processing divided data from the same information source. Has been described above only for the sake of convenience of description, and a device that processes data from different information sources may be used as a device that processes divided data by switching the input side. For example, the modulation blocks 302, 303, 30 in FIG.
4 each with I, possibly from different sources.
It may be used as a block for processing data in the S-95 transmission mode. In such a case, the input to each modulation block is data processed by different frame components.

Further, in each of the above embodiments,
Although the present invention is applied to a transmitting device and a receiving device of a CDMA communication system, the transmitting device and the receiving device of another communication system having a different modulation method or the like (or may not employ the orthogonal spreading method) are shown. The present invention can be applied to However, it is necessary for the receiving side to adopt the rake method. However, when the orthogonal spreading method is adopted as in the above embodiment, the basic transfer speed N
Even at the time of transfer at a double transfer rate, the transfer quality at the same level as the transfer quality at the basic transfer rate can be realized.

[0105]

As described above, according to the transmitting apparatus and the receiving apparatus of the present invention, not only the basic transfer rate but also the transfer rate up to an integral multiple of the basic transfer rate according to the number of finger elements in the receiving apparatus can be obtained. If the transfer rate in transmission is set to be high, the transmission data is divided, and the divided signals are encoded and modulated, and transmitted as independent channel data. Since data is synthesized after receiving data as channel data, the data can be transmitted and received at an integral multiple of the basic transfer rate without changing the encoding and modulation method at the basic transfer rate. Will be able to

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a transmission device according to a first embodiment.

FIG. 2 is a block diagram illustrating a configuration of a conventional transmission device.

FIG. 3 is a block diagram showing a configuration of a conventional receiving apparatus.

FIG. 4 is a block diagram illustrating a configuration of a receiving apparatus according to the first embodiment.

FIG. 5 is a block diagram illustrating a configuration of a transmission device according to a second embodiment.

FIG. 6 is a block diagram illustrating a configuration of a receiving device according to a second embodiment.

FIG. 7 is a block diagram illustrating a configuration of a transmission device according to a third embodiment.

FIG. 8 is a block diagram illustrating a configuration of a receiving apparatus according to a third embodiment.

FIG. 9 is a block diagram illustrating a configuration of a transmission device according to a fourth embodiment.

[Explanation of symbols]

110: quadrature modulation section, 120-1 to 120-3: A transmission block, 130-1 to 130-3 ... B transmission block, 200, 203, 205 ... finger element, 300, 500 ... frame configuration section, 301, 503 , 704: Data division unit, 302 to 304, 504 to 506: Modulation block, 305, 507, 708, 902: Data transfer mode control unit, 403: Rake combine unit, 404 to 406, 604 to 606, 801 to 803 ... Demodulation block, 407, 607, 804: data configuration unit, 408, 609: frame synthesis unit, 409, 610, 806: controller unit, 501: CRC calculation unit, 502: CRC information insertion unit, 608: CRC calculation / comparison unit 703, a convolutional encoder, 805, a convolutional decoder, 901 signal Generating unit.

Claims (9)

[Claims] 1. A transmitting apparatus for transmitting a transmission signal to an opposing receiving apparatus having X finger elements for receiving and processing a multipath signal, comprising: a basic transfer rate; A transfer mode signal indicating a transfer speed Y (Y is any one of 1 to X) times the basic transfer speed of the transfer speed of an integral multiple of the transfer speed, and Y signals indicating on, and the rest indicating off. Transfer mode control means for outputting a total of X operation ON / OFF signals to be instructed; frame structure means for dividing input data into frames for each number of bits corresponding to the transfer speed indicated by the transfer mode signal; A data dividing means provided at a subsequent stage for dividing the input data to itself by Y when the transfer rate indicated by the transfer mode signal is Y times the basic transfer rate; A transmitter apparatus and having an X-number of modulation processing means for modulating processes to allow outputs one of the divided data inputted from said data dividing means to the transmission path. 2. The transmitting apparatus according to claim 1, wherein said data dividing means is provided at a stage subsequent to said frame forming means. 3. An error detection information adding means for adding error detection information to an input frame at a stage subsequent to the frame structuring means, and the data dividing means is provided at a stage subsequent to the error detection information adding means. The transmitting device according to claim 1, wherein 4. An error detection information adding means for adding error detection information to an input frame between the frame structuring means and the data dividing means, and a convolutional code for the frame data to which the error detection information has been added. 2. The transmission apparatus according to claim 1, further comprising convolutional encoding means for performing a conversion process. 5. A transmitting apparatus in which the final processing by each of the modulation processing means is quadrature modulation processing, wherein a quadrature modulation section common to each of the modulation processing means is provided as a quadrature modulation section of each of the modulation processing means. 5. A signal synthesizing unit for synthesizing a signal processed by each of the modulation processing means and sufficient to perform quadrature modulation is provided at a stage preceding the quadrature modulating unit. Transmission device. 6. A basic transfer rate, and X or more twice the basic transfer rate.
Y of the basic transfer speed of the transfer speed of an integral multiple of the number
(Y is any one of 1 to X) Transfer mode signal for instructing a double transfer speed, and transfer mode control for outputting a total of X operation on / off signals in which Y instructs on and the rest instruct off Means, and X finger elements capable of receiving and processing a multipath signal, wherein when the transfer mode signal indicates the basic transfer rate, all execute the reception processing of the multipath signal;
When the transfer mode signal indicates Z (Z is 2 or more and X or less) times the basic transfer rate, at least Z finger elements that execute independent reception processing are provided, and Of the output signals, combine the multipath signals that have been subjected to the same modulation processing,
Rake combine means for outputting Y channel data corresponding to the transfer speed indicated by the transfer mode signal, and one channel input from the rake combine means when the operation on / off signal to itself is on X demodulation processing means for demodulating data, data construction means for composing a frame by combining output data from the Y demodulation processing means, provided at the subsequent stage of the data construction means, A receiving device comprising: a frame synthesizing unit that connects frame data. 7. The receiving apparatus according to claim 6, wherein the frame data from said data composing means is directly inputted to said frame synthesizing means. 8. An error detection / correction means for performing error detection / correction processing on frame data output from said data configuration means between said data configuration means and said frame synthesizing means. Claim 6
3. The receiving device according to claim 1. 9. A convolutional code decoding means for performing a decoding process of a convolutional code on the frame data output from the data composition means, between the data composing means and the frame synthesizing means, and decoding the convolutional code. 7. The receiving apparatus according to claim 6, further comprising an error detection and correction unit that performs error detection and correction processing on the processed frame data.