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Method for detecting the orthogonal code cdma signal

  • US 20070058701A1
  • Filed: 07/29/2004
  • Published: 03/15/2007
  • Est. Priority Date: 08/05/2003
  • Status: Active Grant
First Claim
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1. A method for detecting orthogonal code CDMA signal, applied to a receiving device in a time-slot CDMA system using orthogonal code, comprising the step of:

  • A. performing channel estimation on received signal with the midamble code, so as to obtain the channel response estimation results of all users in the serving cell, wherein it further comprises the following steps;

    B. selecting interference code channels involved in the estimation and estimating the total power of interference to multi-path signals by utilizing the channel response estimation results of all users in the serving cell;

    C. performing matched filtering on the received signal with respect to each multi-path signal of each code channel by utilizing the spread spectrum code and the channel response estimation result thereof for the user to be detected, and performing maximum-ratio combining on the matched filtering results of the multi-path signals by utilizing the total power of interference to the multi-path signals, to obtain the optimized matched filtering result and obtain the orthogonal code CDMA signal detection result from the optimized matched filtering result.

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