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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.
A multi-relay transmission scheme using fountain code and adaptive modulation is proposed and the corresponding multi-relay selection algorithm is given.Firstly, the throughput of several modulation schemes combined with fountain code is analyzed and different SNR , And analyzes the performance of adaptive modulation under fading channel. Then, the fountain code and adaptive modulation technique are applied to the multi-relay transmission scheme, and a relay selection algorithm is given, and a detailed analysis of the The transmission time and the energy consumption performance of the scheme are analyzed.The simulation results of the transmission scheme are compared with those of other schemes.The simulation results show that the scheme can significantly improve the data throughput and shorten the transmission time of the system.