【摘要】 本文首次提出基于速率兼容低密度校验码(low-density parity-check,LDPC)的物理层与数据链路层跨层联合设计方案。从利于系统实现的角度出发,首先提出了一种构造速率兼容LDPC码的删除方案,不但简单易行,而且具有与随机删除相似的误码率性能。然后以该速率兼容LDPC码为前向纠错码,在物理层采用自适应编码调制技术(adaptive modulation and coding,AMC),数据链路层采用选择重传自动请求重传协议(automaticrpepeat reQuest,ARQ),研究了系统在Nakagami-m衰落信道下的吞吐量。计算机仿真结果表明,采用速率兼容LDPC码的AMC-ARQ系统,其吞吐量要优于单独采用AMC或者ARQ。更多还原

【Abstract】 The performance of adaptive modulation and coding(AMC) combined with hybrid automatic repeat request(HARQ) based on rate-compatible low-density parity-check codes(RC-LDPC)is investigated.First a puncturing pattern for RC-LDPC codes is proposed and our puncturing pattern is proved as good as random puncturing but more applicable.Then according to the HSDPA physical layer standards,RC-LDPC codes is applied to AMC combined with ARQ system over Nakagami-m fading channel and the throughput of the system is investigated.Computer simulations show that the joint design of AMC and ARQ base on RC-LDPC codes can achieve considerable spectral efficiency gain.更多还原