级联编码在OFDM系统中性能分析

摘要

RS and convolution codes cascaded by interleaver are used in OFDM system. Matlab simulation shows that cascaded code can improve the performance of OFDM system dramatically. At the range of low to medium SNR. The cascaded code can get 4 dB code gain at most as compared with RS or convolution code. At the range of medium to high SNR, the cascaded code has almost the same performance as convolution code.%将RS编码与卷积编码通过交织器连接,级联应用于OFDM系统之中.通过Matlab仿真显示,级联编码对OFDM系统性能有显著提高.在中低信噪比时,级联编码比单独RS编码或者卷积编码最大有4 dB编码增益；在中高信噪比时,级联编码性能趋近于卷积编码性能.