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中文摘要：
提出一种采用喷泉码和自适应调制的多中继传输方案,并给出相应的多中继选择算法.首先对结合喷泉码的几种调制方案的吞吐量进行分析,给出不同信噪比情况下的最佳调制方案,并分析衰落信道下自适应调制的性能;然后将喷泉码和自适应调制技术应用于多中继传输方案中,给出一种中继选择算法,并详细分析该方案的传输时间和能量消耗性能;最后对该传输方案进行仿真,并与其他传输方案的性能进行比较.仿真结果表明,该传输方案可明显改善系统的数据吞吐量,缩短系统的传输时间.
英文摘要：
A multi-relay transmission scheme using fountain codes and adaptive coding and modulation was proposed, also the corresponding multi-relay selection algorithm was proposed. First of all, the throughput of adaptive modulation with fountain codes was analyzed, the optimal modulation scheme was given in different SNR range, and the performance of adaptive modulation in fading channels was analyzed. Furthermore, fountain codes and adaptive modulation was applied in muhi-relay transmission scheme, gave a relay selection algorithm, and the performance of transmission time and energy consumption for this scheme were analyzed in detail. At last, did the simulation. The result demonstrates that, comparing with other transmission schemes, this transmission scheme improves the data throughput obviously; decreases the transmission time.
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