快衰落信道中交织器设计方法

摘要

A novel interleaver design method for the fast fading channel is presented.The burst errors length is estimated by the statistical characteristics of fading channel simulation model,i.e.,the theoretic expressions of Level Crossing Rate (LCR)and Average Fading Duration (AFD),as well as the signal level in LCR is determined by the LDPC BER performance diagram.Then the interleaver is designed based on the burst errors length.The simulation results show that this method significantly reduces the interleaver delay,and get a relatively good BER performance.%本文提出一种衰落信道中交织器设计的新方法,根据衰落信道的电平交叉率和平均衰落时间估计突发差错长度,结合LDPC编码的误码曲线确定门限电平,设计相应的交织器.仿真结果验证该方法降低交织器延时,并在快衰落信道下得到较理想的系统性能.