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Homology type detecting and decoding method and device

A decoding device and decoding technology, applied in the field of detection and decoding methods and devices, capable of solving problems such as poor performance

Inactive Publication Date: 2008-10-08
ACCTON TECHNOLOGY CORPORATION
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  • Abstract
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  • Claims
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Problems solved by technology

The Hammy correlator design makes the complexity relatively low, but its performance is also poor

Method used

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  • Homology type detecting and decoding method and device
  • Homology type detecting and decoding method and device
  • Homology type detecting and decoding method and device

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Embodiment Construction

[0032] Generally speaking, cell search needs to go through three synchronization stages in sequence, which are (1) the first stage: slot synchronization (2) the second stage: frame synchronization / code group determination (frame synchronization / code group identification) (3) The third stage: scrambling code identification. now please refer to figure 2 , which shows a flow chart of a detection and decoding method according to the present invention, which can be used to effectively improve the performance of cell search. The method can be used in the second stage of the cell search in the CDMA system, that is, the detection and decoding of the secondary synchronization code to obtain the frame synchronization / code group decision, but it is not limited to this application. In step 10, correlation values ​​of the SSCs are coherently calculated, wherein the correlation values ​​are obtained by detecting inner codes and outer codes designed for all SSCs. In step 20, the largest co...

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Abstract

A detection and decode method used in the second stage of cellular search for the CDMA receiving system to detect the secondary synchronizing code of an incoming signal includes homologically calculating the relative value of secondary synchronizing code, where said relative value is obtained by internal code detection and external code detection which are disigned for all secondary synchronizingcodes, choosing maximal relative value for each time slot as the detected secondary synchronizing code of this time slot and to generate a code word, receiving whole or part of code word, and decoding by homogically weighted Reed-Solomon code to obtain the code group and code frame synchronization of said incoming signal. Its detecting decoder is also disclosed.

Description

technical field [0001] The invention relates to a detection and decoding method and device, which are used in the decoding process of a communication system. More particularly, it relates to a detection and decoding method and device for the Third Generation Cooperation Project (3 rd Generation Partnership Project (3GPP) wideband code division multiple access (W-CDMA) cell search (cell search). The method and device use coherent detection and coherent weighted continuous Reed-Solomon code (comma-free Reed Solomon code, CFRS) decoding to effectively improve performance. Background technique [0002] CDMA cellular systems using a direct sequence spread spectrum code division multiple access technique greatly increase channel capacity. This system has attracted considerable attention in recent research on mobile communication systems. Generally speaking, due to the nature of frequency reuse, the bandwidth efficiency of CDMA systems is superior to that of other multitasking ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/00H04Q7/20H04B7/26
Inventor 何建兴沈文和
Owner ACCTON TECHNOLOGY CORPORATION
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