Implement of Extracting Circuit for Soft-information in M-ary Orthogonal Code Spread-spectrum System
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Abstract:
In the coherent M-ary Orthogonal Code Spread-Spectrum System,the maximal value decision of the output signals from the multiple matched filters is needed before channel decoding.Based on the Log-likelihood Radio(LLR),a suboptimal soft-information extracting scheme in the M-ary Orthogonal Code Spread-spectrum System is proposed and the performance of the system in the AWGN channel is analyzed.Then the architecture of the system implemented on FPGA is presented.The practical results indicate that the scheme is effective and can be implemented on FPGA easily and conveniently.
