【摘要】 提出了结构半随机LDPC码,分析了其在不同码率时,编、译码具有兼容性的特性。介绍了基于结构半随机LDPC码的递增冗余HARQ方案,给出了这种方案的吞吐量性能封闭解。在AWGN信道和Rayleigh衰落信道下,通过仿真将新方案的性能和随机LDPC码的性能进行了比较,结果显示,结构半随机LDPC码的递增冗余HARQ方案性能接近随机LDPC码,但编、译码更简单,参数选择范围更广。更多还原

【Abstract】 Structured semi-random LDPC code is presented,and its character with rate-compatible is analyzed.An incremental redundancy hybrid ARQ(HARQ) scheme based on structured semi-random LDPC codes is introduced.The throughput of the new HARQ scheme is studied and the closed-form solutions are obatind.Furthermore,the throughput of the new HARQ scheme is simulated.It shows that for arbitrary block fading channel,comprising AWGN channel,the performance of IR-HARQ schemes based on SSR-(LDPC)is the same as those based on random LDPC.But the encoding and decoding of SSR-(LDPC) is simpler,and the wider range changing of code rates of SSR-LDPC can be obtained than those of random LDPC.更多还原