KR0155319B1 - 5mhz-wide-band cdma channel structure for pcs having 3/5 convolutin code - Google Patents

Abstract

The present invention relates to a 5MHz wideband CDMA channel structure for PCS using a 3/5 convolutional code that can make full use of the system presented in IS-95.

The present invention provides a code spread of 4.096 Mcps, which can be suitably used in the 5 MHz band by 1/6 flat interleaving, and a variable 32 Kbps or fixed 64 Kbps information channel and a separate 4.8 Kbps or 9.6 Kbps additional signal channel by bit separation. It is a structure that can be configured.

Description

5MHz Wideband CDMA Channel Structure for PCS with 3/5 Convolutional Codes

1 is a block diagram of a forward wideband Code Division Multiple Access (CDMA) pilot channel, a synchronization channel, a paging channel, and a traffic channel to which the present invention is applied.

2 is a block diagram of a reverse broadband CDMA access channel and a traffic channel to which the present invention is applied.

FIG. 3 is a schematic block diagram of the forward CDMA channel structure presented by IS-95 in FIG.

4 is a schematic block diagram of a reverse CDMA channel structure presented by IS-95 in FIG.

5 is an internal block diagram for processing a forward wideband CDMA traffic channel signal according to the present invention.

6 is an internal block diagram for processing a reverse wideband CDMA traffic channel signal according to the present invention.

* Explanation of symbols for main parts of the drawings

10, 30: first and second channel processing unit

10d and 30b: first and second traffic channel processing units

11, 31: Spreading part

12, 32: first and second I / Q orthogonalization and QPSK modulator

21, 39: 1st, 28th bit encoder tail processing unit

22, 40: First and second convolution encoders

23, 41: the first and second symbol repeats

24, 42: first and second punctured interleaver

24a and 42a: first and second puncturing portions 24b and 42b: first and second block interleaver

26, 43: 1st, 2nd long code generator 27a, 27b: 1st, 2nd accumulator

28: forward link I / Q spreader 44: reverse link I / Q spreader

The present invention relates to a 5 MHz wideband CDMA channel structure for PCS with a 3/5 convolutional code. In particular, the present invention relates to a 5 MHz wideband CDMA channel structure. A 5 MHz wideband CDMA channel structure for a personal communication service using a / 5 convolutional code. More specifically, personal communication service (PCS) allocated to 1.8 GHz to 2.2 GHz has 5 HMz as the minimum bandwidth.

Accordingly, the user's needs are changing to have a structure capable of 32 Kbps Adaptive Differential Pulse Code Modulation (ADPCM), 64 Kbps still picture, and 14.4 Kbps compressed voice service.

The present invention is intended to describe an extended broadband channel structure in IS-95 suitable for such conditions.

Currently, the CDMA system structure proposed in the Interim Standard (IS) -95 uses a convolution code as a channel coding method.

The forward CDMA channel structure in the current IS-95 system structure will be described with reference to FIG. 1 as follows.

As shown in FIG. 1, first, the channel processor 10 includes a pilot channel processor 10a for channel coding pilot channel information on a forward link, and a sync channel processor 10b for channel coding sync channel information 12 Kbps. And a paging channel processing unit 10c for channel coding paging (calling) channel information (9.6 Kbps and 4.8 Kbps), and a traffic channel information processing unit 10d for coding traffic channel information.

In addition, the first spreading unit 11 performs a Walsh function through modulo-2 addition to a symbol coded by the units 10a to 10d in the channel coding unit 10 on the forward link. Spread to 32, m, n) so that the PN chip rate is 1.2288 Mcps.

In addition, the first I / Q orthogonalization and QPSK modulator 12 performs orthogonalization and QPSK modulation on 1.2288 Mccps transmitted from the first spreading unit 11 to the I channel and the Q channel and loads them on the carrier.

In addition, the reverse CDMA channel structure in the IS-95 system structure will be described with reference to FIG.

As shown in FIG. 2, first, the second channel processor 30 is a channel used when attempting communication between a mobile station and a base station, and includes an access channel processor 30a for channel coding access channel information of a reverse link, And a traffic channel processor 30b for channel coding the traffic channel information of the reverse link.

The second spreading unit 31 covers the channel coded symbols in each of the units 30a and 30b in the second channel processing unit 30 with the Walsh function through modulo-2 addition, so that the PN chip rate is 1.2288 Mcps. Be sure to

The second I / Q orthogonalization and QPSK modulator 32 orthogonalizes and QPSK modulates 1.2288 Mccps covered and transmitted by the second spreading unit 31 to the I and Q channels.

As described above, the parts of the present IS-95 system structure according to FIGS. 1 and 2 have the same structure except for the first and second traffic channel processing units 10d and 30b. , 30b).

In addition, the forward and reverse link keys are different from the present invention internally in the spreading units 11 and 31 and the I / Q orthogonalization and QPSK modulators 12 and 32, but are not directly related to the present invention and will not be described. .

Accordingly, the internal configuration and operation of the first traffic channel processor 10d in the forward CDMA channel structure described with reference to FIG. 1 will be described below with reference to FIG.

First, the 8-bit encoder tail processing unit 1a transmits the forward traffic channel information bits 172, 80, 40, 16 bits / frame for the user m, where the number of bits per frame can be changed every frame. When transmitting at 9.2Kbps (or 4.4Kbps, 2.0Kbps, 0.8Kbps), it handles 8-bit encoder reset tail to distinguish between frames.

In addition, the convolutional encoder 2a has an information rate of 9.6 Kbps (or 4.8 Kbps, 2.4 Kbps, 1.2 Kbps) through the 8-bit encoder tail processing unit 1a, where the information rate varies depending on the amount of information and voice characteristics. In channel coding is performed using a convolutional code having a coding rate r of 1/2 and a constraint length k of 9.

According to this channel coding, the code symbol is kept at 19.2 Kbps. The symbol repeater 3a is a low speed (eg 9.6 Ksps, 9.6 Ksps, by convolutional coding through the convolutional encoder 2a and the repetition rate according to the information rate according to the repetition rate). The symbol is repeated a predetermined number of times for 4.8 Ksps and 2.4 Ksps).

The block interleaver 4a then performs block interleaving every 20 ms to prevent burst errors in the transmitted information.

On the other hand, the long code generator 5a receives the long code mask for user m and generates I, Q sequence codes of 1.2288 Mcps to encrypt the symbols.

Accordingly, the condenser 6a condenses 19.2: 1 the I, Q sequence codes of 1.2288 Mcps generated from the long code generator 5a.

Another condenser 7a reduces the symbol rate through the condenser 6a at a predetermined rate and outputs a frequency of 800 Hz.

The multiplexer (MUX) 8a uses the condenser 7a as a symbol in which 19.2 Kbps reduced by the condenser 6a and 19.2 Kbps inserted through the block interleaver 4a are modulo-2 added. Multiplexing is performed to control power according to the frequency of 800Hz and power control bits of 800bps.

The multiplexed symbols are covered with the Walsh function and then QPSK modulated by the forward link I / Q spreader 9a.

That is, the forward link I / Q spreader 9a transmits I, Q sequences (where Q sequences are delayed for half a period than I sequences) through an FIR filter and then carries a carrier frequency (COS (W _c t)). , SIN (W _c t)).

Next, an internal configuration and operation of the second traffic channel processor 30b in the reverse CDMA channel structure described with reference to FIG. 2 will be described with reference to FIG.

First, the 8-bit encoder tail processor 1b distinguishes between frames when transmitting reverse traffic channel information bits 172, 80, 40, or 16 bits / frame at a telegram rate of 9.2 Kbps (or 4.4 Kbps, 2.0 Kbps, 0.8 Kbps). Handles the tail for 8-bit encoder reset.

In addition, the convolutional encoder 2b has a code rate r of 1/3 at a data rate of 9.6 Kbps (or 4.8 Kbps, 2.4 Kbps, 1.2 Kbps) through the 8-bit encoder tail processing unit 1b. Channel coding is done using a convolution code with constraint length) (k) of 9.

According to this channel coding, the code symbol is maintained at 28.8 Kbps.

The symbol repetition unit 3b is a low-speed (for example, 14.4 Kbps, 7.2 Kbps, 3.6 Kbps) to achieve a symbol rate of the final 28.8 Kbps by the convolutional encoding through the convolutional encoder 2b and the repetition rate according to the information rate The symbol is repeated a predetermined number of times.

The block interleaver 4b then performs block interleaving every 20 ms to prevent burst errors in the transmitted information.

64 orthogonal modulators 5b. …

The data burst renderer 6b is... …

The long code generator 7b receives a long code mask and generates 1.2288 Kbps of I and Q sequence codes to spread the symbols transmitted through the block interleaver 4b.

In this case, the above-described Q sequence is delayed for a half period of the chip than the I sequence.

Therefore, modulo-2 addition is made between the data output from the data burst renderer 6b and the 1.2288 Mcps generated from the long code generator 7b.

The reverse link I / Q spreader 6b receiving the modulo-2 addition data passes the I and Q sequences through a FIR filter and then carries a carrier frequency (COS (W _c t), SIN (W _c t)). Mix with

In the prior art as described above, a code rate 1/2 convolution code is used for a forward link in which a signal is transmitted from a base station to a mobile station, and a code rate 1/3 convolution code is used for a reverse link in which a signal is transmitted from a mobile station to a base station. Was used.

Here, adding more redundancy to the reverse link than the forward link uses a coherent demodulation method on the forward link, whereas a non-coherer inferior to the coherent demodulation method on the reverse link in performance. The non-coherent demodulation method is used to compensate for the performance degradation.

In addition, the PN chip rate used for spreading the spectrum in the IS-95 system structure of the prior art is 1.2288Mcps, and the information transmission rate is up to 9.6Kbps.

The PN chip rate of the CDMA JTC PCS Standard (Joint Technical Committee, PN 3384) based on the IS-95 system structure is 1.2288Mcps, which is the same as the IS-95 system structure, but the maximum data rate is extended to 14.4Kbps.

Therefore, the existing 800MHz structure can be utilized as it is, but in order to use the minimum band of 5MHz, 3-4 narrowband bands must be overlapped in frequency arrangement and 32Kbps ADPCM (Adaptive Differential Pulse Code Modulation) Could not meet the service demand, such as.

In addition, the broadband PCS standard requires the use of a PN chip rate of 4.096 Mcps to use the 5 MHz band.

This is because the guard band is considered to avoid interference with adjacent frequency bands when the frequency transition region is set to about 20%.

However, this system has a different structure from that of the IS-95 system.

Accordingly, an object of the present invention is to provide a 5MHz wideband CDMA channel structure for PCS using a 3/5 convolutional code in order to maximize cost and effectiveness by utilizing the IS-95 system structure according to the above needs. .

A technical feature of the present invention for achieving the above object is a first feature of eliminating one of six symbols to match a repeated symbol rate to a predetermined rate in a forward CDMA channel structure of an IS-95 system structure at a predetermined rate. By including puncturing means, the wideband CDMA channel structure for 5MHz PCS can be utilized to the maximum.

Another feature is that 5MHz PCS is configured by including a second puncturing means for eliminating one of the six symbols by adjusting the repeated symbol rate to a predetermined rate in the reverse CDMA channel structure of the IS-95 system structure. It is possible to take full advantage of the wideband CDMA channel structure.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

5 shows a forward wideband CDMA traffic channel structure.

Referring to FIG. 5, the configuration is an eighteenth bit encoder tail processor 21 for distinguishing between frames in the forward traffic channel information bits (varies as shown in Table 1 and 20 according to the variable characteristics of voice and image data). ) And a coding rate in a state of information transmission rate of predetermined (38.4 / [76.8] ^* Kbps, 19.2Kbps, 9.6Kbps, 4.8Kbps according to the variable characteristic of speech) through the 18th bit encoder tail processing unit 21. a first convolutional encoder (22) for channel coding using a convolutional code having r) of 1/2 and a constraint length (k) of 9, and through the first convolutional encoder (22) convolutional coding with a predetermined ^{(76.8 / [153.6] *,} 38.4Kbps, 10.2Kbps, 9.6Kbps) of the low speed such that the symbol rate of a predetermined ^{(76.8 / [153.6] * Kbps} ) by the repetition rate of the information transfer rate (the 76.8Kbps The first symbol repeating unit 23 repeating the symbol a predetermined number of times, and repeating the first symbol A first puncture ring portion (24a) and the first puncture ring portion (24a) for removing one of the six symbols to match the symbol rate iteration through 23 at a rate of a predetermined ^{(64 / [128] * Kbps} ) A first punctured interleaver (24) composed of a first block interleaver (24b) that prevents a burst error of the remaining symbols from which one symbol is removed by a symbol, and 4.096Mcps to encrypt a symbol by receiving a long code mask for user m. A first long code generator 26 for generating an I, Q sequence code of a first interval, and a first time for shortening the I, Q sequence code of 4.096 Mcps generated from the first long code generator 26 to 64: 1. An accumulator 27a and a second accumulator 27b for condensing the 64 Kbps reduced through the first accumulator 27a at a predetermined ratio (about 8: 1) so as to be a predetermined (800 Hz), and the first 64 Kbps / [128] ^* Kbps shortened by the condenser 27a and 64 Kbps with the burst error prevention through the first block interleaver 24b depend on modulo-2 addition. And a multiplexer 25 for power control according to a frequency of 800 Hz and a power control bit of 800bps received through the second reducer, and the multiplexed symbol is covered with a Walsh function n and then an I-channel and It consists of a forward link I / Q spreader 28 that orthogonalizes and QPSK modulates the Q channel.

6 shows a reverse broadband CDMA traffic channel structure according to the present invention.

Referring to FIG. 6, the configuration is the 28th bit encoder tail processor 39 for distinguishing between frames in the reverse traffic channel information bits (varies as shown in Table 1 and 20 according to the variable characteristics of audio and image data). ) And a coding rate in the information rate state of predetermined (38.4 / [76.8] ^* Kbps, 19.2Kbps, 9.6Kbps, 4.8Kbps depending on the variable characteristics of the voice) through the 28th bit encoder tail processing unit 39 a second convolutional encoder 40 for channel coding using a convolutional code having r) of 1/2 and a constraint length (k) of 9, and through the second convolutional encoder 40 convolutional coding with a predetermined ^{(76.8 / [153.6] *,} 38.4Kbps, 10.2Kbps, 9.6Kbps) of the low speed such that the symbol rate of a predetermined ^{(76.8 / [153.6] * Kbps} ) by the repetition rate of the information transfer rate (the 76.8Kbps The second symbol repeater 41 repeating the symbol a predetermined number of times, and repeating the second symbol. A second puncturing portion 42a and a second puncturing portion 42a for removing one of the six symbols in order to adjust the symbol rate repeated through the section 41 to a predetermined (64 / [128] ^* Kbps) rate. A second punctured interleaver 42 composed of a second block interleaver 42b which prevents a burst error of the remaining symbols from which one symbol is removed, and a long code mask for the user m, to spread the symbols. The second long code generator 43 generating Kbps, the 4.096 Kbps generated from the second long code generator 43 and the modulated symbol through the second block interleaver 42b are modulated by the modulo-2. It is composed of a reverse link I / Q spreader 44 that is spread by the Walsh function and orthogonalized and QPSK modulated to the I and Q channels.

The operation of the forward and reverse broadband CDMA traffic channel structure configured as described above will be described with reference to Table 1.

First, Table 1 is as follows.

As shown in Table 1, in the embodiment of the present invention, a basic voice frame for 32 Kbps ADPCM is transmitted in 5 ms units.

In addition, in order to transmit a 64Kbps still image, image data is increased in units of 2.5ms to increase the data rate.

In this case, 160 bits per 5ms are transmitted to transmit 32Kbps voice and 160 bits per 2.5ms to transmit 64Kbps image.

According to the characteristics of the voice as shown by reference numeral 20 shown in FIG. 5, the voice data may be varied to 160, 80, 40, and 16 bits per 5ms frame, and the frame quality indicator bit as in IS-95 at 160 and 80 bits. Are added by 24 and 8 bits, respectively.

As shown in Table 1, in the present invention, a separate channel can be configured for data and signals at a full speed of 4 times the speed of the IS-95 system structure, and thus there is no need for a separate multiplexer / demultiplexer.

In addition, the first and second puncturing parts 24a and 42a are repeated 76.8 / 153.6 through the first symbol repeating part 23. 64 Kbps / 128 by 1/6 punctured interleaving By changing to Kbps, the integer value is 64/32 Double spreading can achieve 4.096 Mcps.

Accordingly, the operation of FIG. 5 as an embodiment of the present invention will be described with reference to Table 1.

As an example of the forward traffic channel information bits, when transmitting 64 Kbps still picture and 9.6 Kbps compressed voice information or signal, the number of bits per extended frame, which is 2.5 ms frame, is transmitted in 160 bits and 24 bits, respectively.

Accordingly, the 18th bit encoder tail processor 21 identifies the section of the transmitted 2.5ms frame and transmits 38.4 Kbps * 2 = 76.8 Kbps of data to the first convolutional encoder 22. The first convolutional encoder 22 transmits the code symbols of 153.6 Kbps according to the code rate 1/2 and the restriction length 9 of the transmitted 76.8 Kbps data.

The transmitted code symbol is made 153.6 Kbps by repeating a symbol other than 153.6 Kbps a predetermined number of times by the first symbol repeating unit 23, and the repeated symbol is 1/6 punctured by the first puncturing unit 24a. This results in 128 Kbps.

The symbol punctured by the first puncturing unit 24a is transmitted as a symbol modulated by the first block interleaver 24b.

Therefore, the actual convolutional code rate achieved through the processing of the first convolutional encoder 22, the first puncturing portion 24a, and the first block interleaver 24b is 1/2 * 6/5 = 3/5. do.

At this time, the first block interleaver 24b enables communication when the communication is disconnected due to a burst error during communication.

On the other hand, the I, Q sequence codes of 4.096 Mcps generated by the first long code generator 26 are reduced by 32: 1 by the first accumulator 27a to generate 128 Ksps.

Accordingly, 128 Kbps transmitted through the first block interleaver 24b and 128 Kbps transmitted through the first condenser 27a are added by Modulo-2 using an exclusive logical sum element (not shown). This modulo-2 addition result is received by the power control bit (800bps) and the second frequency reducer 27b by 800Hz reduced by a predetermined ratio, and the multiplexer 25 multiplexes a certain symbol.

The multiplexed symbols are covered with a Walsh function and then QPSK processed by the forward link I / Q spreader 28.

In addition, as another example of the forward traffic channel information bits, when transmitting 32Ksps ADPCM information (for example, voice information) and 4.8Ksps signal, the basic rate is 160ms and 24bits, respectively, in units of 5ms per frame.

The 18-bit encoder tail processor 21 transmitted as described above is transmitted to 38.4 Ksps, and a code symbol having an output speed of 76.8 Ksps is transmitted by the first convolutional encoder 22.

Accordingly, the first symbol repeater 23 repeats symbols other than 76.8 Ksps output from the first convolutional encoder 22 to make 76.8 Ksps.

The first puncturing unit 24a receiving the repeated symbol makes 64 Ksps by 1/6 puncturing 76.8 Ksps, and removes the burst error by the first block interleaver 24b from the symbol thus produced.

Therefore, the convolutional code rate achieved through the processing of the first convolutional encoder 22, the first puncturing portion 24a, and the first block interleaver 24b as described above is 1/2 * 6/5 = 3 / 5 becomes

On the other hand, receiving the long code mask for the user m (integer), the first long code generator 26 generates I, Q sequence codes of 4.096 Mcps.

Accordingly, the first accumulator 27a shortens 4.096 Mcps by 64: 1, and the reduced 64Ksps and the modulation symbols transmitted through the first block interleaver 24b are added by modulo-2 (e.g., Exclusive logical sum).

The operations of the multiplexer 25 and forward link I / Q spreader 28 below are the same as in the above example.

On the contrary, the operation in FIG. 6 according to the embodiment of the reverse broadband CDMA channel structure, which is a case of transmitting a signal from a mobile station to a base station, will be described with reference to Table 1 as follows. As an example of reverse traffic channel information bits, when transmitting 64 Kbps still picture and 9.6 Kbps compressed voice information or signal, the number of bits per extended frame, which is 2.5 ms frame, is transmitted in 160 bits and 24 bits, respectively.

Accordingly, the 28th bit encoder tail processor 39 identifies the section of the transmitted 2.5ms frame and transmits 38.4 Kbps * 2 = 76.8 Kbps of data to the second convolutional encoder 40. The second convolutional encoder 39 transmits the code symbol of 153.6 Kbps according to the code rate 1/2 and the restriction length 9 of the transmitted 76.8 Kbps data.

The transmitted code symbol is made 153.6 Kbps by repeating a symbol other than 153.6 Kbps a predetermined number of times by the second symbol repeating unit 23, and the repeated symbol is 1/6 punctured by the second puncturing unit 42a. This results in 128 Kbps.

The symbol punctured by the second puncturing unit 42a is transmitted as a symbol modulated by the second block interleaver 42b.

Therefore, the actual convolutional code rate achieved through the processing of the second convolutional encoder 40, the second puncturing unit 42a, and the second block interleaver 42b is 1/2 * 6/5 = 3/5. do.

At this time, the second block interleaver 42b enables communication when communication is disconnected due to a burst error during communication.

On the other hand, the second long code generator 43 which has received the long code mask for user m generates 4.096 Mcps.

Accordingly, 128 Kbps transmitted through the second block interleaver 42b and 4.096 Mcps transmitted through the second long code generator 43 are added by Modulo-2 using an exclusive logical sum element (not shown). .

The result added by the modulo-2 is spread with the mask code for user m, so that the reverse link I / Q spreader 44 processes a separate QPSK modulation process different from the forward direction.

In addition, as another example of the reverse traffic channel information bits, when transmitting 32Kbps ADPCM information (for example, voice information) and a 4.8Kbps signal, the basic rate is 160 bits and 24 bits in 5 ms units per frame.

The information transmitted in this manner is transmitted at 38.4 Kbps through the 28th bit encoder tail processing unit 39, and a code symbol having an output speed of 76.8 Kbps is transmitted by the second convolutional encoder 40.

Accordingly, the second symbol repeater 41 repeats symbols other than 76.8 Ksps output from the second convolutional encoder 41 to make 76.8 Ksps.

The second puncturing unit 42a receiving the repeated symbol makes 64 Kbps by 1/6 puncturing 76.8 Kbps, and removes the burst error by the second block interleaver 42b.

Therefore, the convolutional code rate achieved through the processing of the second convolutional encoder 40, the second puncturing unit 42a, and the second block interleaver 42b as described above is 1/2 * 6/5 = 3 / It becomes five.

On the other hand, receiving the long code mask for user m (integer), the second long code generator 43 generates 4.096 Mcps.

Accordingly, the 4.096 Mcps generated by the second long code generator 43 and the modulation symbols transmitted through the second block interleaver 42b are added by modulo-2 (for example, using an exclusive logic element). .

The symbols added by the modulo-2 in this way are spread with the user mask code and modulated by the reverse link I / Q spreader 44.

According to the above description, the forward and reverse traffic channel information transmitted to the first and 28th bit encoder tail processing units 21 and 39 is divided into 160 bits and 24 bits from 184 bits in a 5ms frame at the basic rates shown in Table 1. Therefore, by forming two independent channels without a separate multiplexer / demultiplexer, 32Kbps ADPCM information can be continuously transmitted and at the same time, a signal of 4.8Kbps can be transmitted.

In addition, even in an extended frame, a 64Kbps still picture or 9.6Kbps compressed voice information or signal can be transmitted, and a compressed voice or signal can be independently transmitted.

In the forward and reverse traffic channel information transmitted to the first and 28th bit encoder tail processing units 21 and 39, the frame length is 2.5ms as shown in Table 1 when transmitting 64 Kbps, so that the number of bits per frame is the basic speed. This can be 192 bits.

Subsequently, error correction (convolution encoding and Viterbi decodering) by the first and second convolutional encoders 22 and 40 and the first and second puncturing units 24a and 42a and the first and second block interleavers 24b and By making the size of the data block constant during interleaving block coding according to 42b), it is possible to process data with the same H / W only by changing the clock speed in the transceiver.

The effects of the present invention as described above are as follows.

First, the number of frame bits is 192 bits, such as IS-95, so that the upper message structure is similar to that of IS-95.

Second, because the data and signal channels are separated, in a signal protocol, complicated multiplexer / demultiplexer as in IS-95 is unnecessary and continuous data transmission is possible.

Third is 4.096 cps spreading, which is suitable for 5 MHz, the minimum bandwidth allocated to PCS.

At this time, it accommodates 32Kbps ADPCM voice and 64Kbps still picture service, PCS's highest demand service, and supports the improved 13Kbps PCS common vocoder.

Fourth, with the appropriate spreading in the minimum allocation band of the PCS and the support of various vocoders, it is possible to efficiently use radio resources according to the sound quality requirements and price differential service.

Claims (10)

A code rate r is 1/2 and a constraint length in a predetermined information rate state through a 18 th bit encoder tail processor for discriminating between frames in a forward traffic channel information bit and the 18 th bit encoder tail processor. The first convolutional encoder performing channel coding using a convolutional code of (k) equals to 9, the convolutional coding through the first convolutional encoder, and a repetition rate according to the information rate, so as to achieve a predetermined symbol rate. An I, Q sequence of 4.096 Mcps to receive the first symbol repeater for repeating the symbol a predetermined number of times, the first block interleaver to prevent symbol burst errors, and a long code mask for user m to encrypt the symbol. A first long code generator for generating a code, a first short coder for shortening the I, Q sequence code of 4.096 Mcps generated from the first long code generator to 64: 1; The second reducer that reduces the 64Ksps reduced by one reducer to a predetermined frequency, the 64Ksps reduced by the first reducer, and 64Ksps whose burst error is prevented through the block interleaver A multiplexer for power control according to a frequency of 800 Hz and a power control bit of 800bps received through the second shorter by receiving a symbol made by -2 addition, and the multiplexed symbol is covered with a Walsh function n and then an I channel. In a forward wideband CDMA channel structure consisting of a forward link I / Q spreader that orthogonalizes and QPSK modulates the Q channel and the Q channel, one of six symbols is set to adjust a symbol rate repeated through the first symbol repeater at a predetermined rate. 5MHz wideband CDMA for PCS with a 3/5 convolutional code, characterized in that it has a 3/5 convolutional code rate including a first puncturing portion to remove Board structure. The 3/5 convolution code according to claim 1, wherein the forward traffic channel information transmitted to the 18th bit encoder tail processor is transmitted by separating 184 bits of 160 bits and 24 bits in a 5ms frame at a basic speed. 5MHz wideband CDMA channel structure for PCS with an antenna. The forward traffic channel information transmitted to the 18-bit encoder tail processor includes 32 Kbps ADPCM information for two independent channels without separate multiplexers because 184 bits in a 5 ms frame are separated into 160 bits and 24 bits at a basic speed. A 5 MHz wideband CDMA channel architecture for PCS with a 3/5 convolutional code, characterized by being capable of sending continually and simultaneously sending signals of 4.8 Kbps. [3] The 3/5 convolution of claim 1, wherein the forward traffic channel information transmitted to the 18-bit encoder tail processor is independently transmitted with 64 Kbps still picture and 9.6 Kbps compressed voice information or signal in an extended frame. 5 MHz wideband CDMA channel structure for PCS with code. [3] The 3/5 convolution of claim 1, wherein the forward traffic channel information transmitted to the 18th bit encoder tail processing unit has a frame length of 2.5 ms when transmitting a 64 Kbps still picture and 9.6 Kbps compressed voice information or a signal. 5 MHz wideband CDMA channel structure for PCS with 3/5 convolutional code with code. A code rate (r) is 1/2 and a constraint length in a predetermined information rate state through a 28 th bit encoder tail processor and a 28 th bit encoder tail processor for discriminating between frames in a reverse traffic channel information bit. a second convolutional encoder performing channel coding using a convolutional code of (k) of 9, convolutional coding through the second convolutional encoder, and a repetition rate according to the information rate to achieve a predetermined symbol rate A second symbol repeater for repeating the symbol a predetermined number of times, a second block interleaver for preventing a symbol's burst error, and a second code generator generating 4.096 Mcps to spread the symbol by receiving a long code mask for user m Walsh function modulo-2 sum of long code generator, 4.096 Mcps generated from the second long code generator and modulation symbol through the second block interleaver In a reverse wideband CDMA channel structure consisting of a reverse link I / Q spreader that spreads and is orthogonalized and QPSK modulated to an I channel and a Q channel, six symbols are used to adjust a symbol rate repeated through the second symbol repeater at a predetermined rate. A 5MHz wideband CDMA channel structure for a PCS with a 3/5 convolutional code, characterized in that it is configured to have a 3/5 convolutional code rate including a second puncturing portion for removing one of the two. The 3/5 convolution code according to claim 6, wherein the reverse traffic channel information transmitted to the 28th bit encoder tail processor is divided into 160 bits and 24 bits in 184 bits in a 5ms frame at a basic speed. 5MHz wideband CDMA channel structure for PCS with an antenna. The reverse traffic channel information transmitted to the 28-bit encoder tail processor is divided into two bits of 160 bits and 24 bits in a 5ms frame at a base rate, thereby providing two independent 32 Kbps ADPCM information without a separate demultiplexer. A 5 MHz wideband CDMA channel architecture for PCS with a 3/5 convolutional code, characterized by being capable of sending continually and simultaneously sending signals of 4.8 Kbps. The 5/5 convolution according to claim 6, wherein the reverse traffic channel information transmitted to the 28th bit encoder tail processor is independently transmitted with a 64Kbps still picture and 9.6Kbps compressed voice information or a signal in an extended frame. 5 MHz wideband CDMA channel structure for PCS with code. The 5/5 convolution according to claim 6, wherein the reverse traffic channel information transmitted to the 28th bit encoder tail processing unit has a 64 Kbps still picture and 9.6 Kbps compressed voice information or a frame length of 2.5 ms during signal transmission. 5 MHz wideband CDMA channel structure for PCS with code.