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Encoding/decoding appts. and method in CDMA mobile communication system

A technology of a mobile communication system and an encoding method is applied in the field of sending a reverse rate indicator channel used in a synchronous mobile communication system, and can solve the problem that a receiver cannot correctly receive and analyze the reverse auxiliary channel.

Inactive Publication Date: 2006-06-28
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the receiver cannot correctly receive and analyze the reverse auxiliary channel

Method used

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  • Encoding/decoding appts. and method in CDMA mobile communication system
  • Encoding/decoding appts. and method in CDMA mobile communication system
  • Encoding/decoding appts. and method in CDMA mobile communication system

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0128] First embodiment (encoder)

[0129] Figure 5 Shows the use of (24,1) encoder, (24,2) encoder, (24,3) encoder, (24,4) encoder, (24,5) encoder, (24 , 6) Encoder and (24,7) Encoder and (24,7) Encoder structure of all encoders. That is to say, Figure 5 The encoder shown encodes 1 to 7 input information bits using different Walsh codes or masks of length 2, 4, 8, 16 or 32, outputting an encoded symbol stream having 24 encoded symbols.

[0130] refer to Figure 5 , the controller 510 controls the encoding operation by determining the number of bits of the input information. That is to say, when the number of bits of the input information is 1, the controller 510 controls the Walsh code generator 500 to generate a Walsh code with a length of 2. And, the controller 510 sets the repetition frequency of the repeater 550 to 32, and controls the puncturer 560 to puncture symbols in 40 punctured positions corresponding to 1 input information bit. When the number of input inf...

no. 2 example

[0265] Second embodiment (encoder)

[0266] Figure 9 The structure of an encoder serving as all of the (24, 1) encoder to (24, 7) encoder having different lengths according to the second embodiment of the present invention is shown. That is to say, Figure 9 The encoder shown encodes 1 to 7 input information bits using different Walsh codes or masks of length 32, outputting an encoded symbol stream having 24 encoded symbols. Unlike the encoder according to the first embodiment, the encoder according to the second embodiment does not include a symbol repeater.

[0267] refer to Figure 9 , the controller 1110 controls the encoding operation by determining the number of bits of the input information. That is, the controller 1110 provides the puncturer 1160 with a control signal instructing it to puncture symbols in 8 punctured positions corresponding to input information bits. Walsh code generator 1100 generates length 32 Walsh codes. For example, Walsh code generator 110...

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Abstract

The present invention discloses an apparatus and method for transmitting R-RICH (Reverse Rate Indicator Channel) in a CDMA (Code Division Multiple Access) mobile communication system. There is provided an encoding / decoding apparatus and method for generating optimal codewords for optimal (24,1) encoding to optimal (24,7) encoding, and supporting all of an optimal (24,1) encoder to an optimal (24,7) encoder.

Description

technical field [0001] The present invention generally relates to encoding / decoding devices and methods in CDMA (Code Division Multiple Access) mobile communication systems, and more particularly to devices and methods for transmitting Reverse Rate Indicator Channel (R-RICH) used in synchronous mobile communication systems. Background technique [0002] In general, the Reverse Supplementary Channel (R-SCH) basically supports a variable rate transmission scheme. In the "variable rate transmission scheme", the mobile station arbitrarily changes its transmission rate. In general, a change in data rate causes a change in the code rate of the error correction codes used in constructing the frame, the symbol repetition frequency, and the length and type of Walsh codes used for spreading. Therefore, the mobile station should inform the base station of the data rate of the currently transmitted reverse supplemental channel so that the base station receiver can correctly receive the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/00H03M13/15H03M13/35H04B1/707H04J13/12H04L1/00
CPCH04L1/0069H04L1/0002H04L1/0043H04L1/0057H04L1/0072H04L1/08H03M13/00
Inventor 金尹善张在成崔虎圭金宰烈权桓准
Owner SAMSUNG ELECTRONICS CO LTD
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