| 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。 |
| 关键词: 高速数据传输 差错控制 结构半随机LDPC码 递增冗余 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:March 13, 2006Revised:May 11, 2006 |
| 基金项目:东南大学校科研和教改项目 |
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| Incremental Redundancy Hybrid ARQ Scheme Based on Structured Semi-Random LDPC Codes and its Performance Analysis |
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| 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. |
| Key words: HARQ |
