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协同中继通信是无线网络中的重要传输方式,为提高系统传输效率,文章将喷泉码引入到协同中继通信中来。在源节点到中继节点的传输阶段,将待发送数据进行LT码编码,减少了反馈信息量;在中继节点到目的节点的传输阶段提出了比特级的Raptor码信息累积方案,使中继节点不需要瞬时信道状态信息就可以使数据传输自适应信道质量。理论分析和仿真结果表明本方案减少了系统传输时间,降低了延时和能量消耗。
Cooperative relay communication is an important transmission mode in wireless networks. In order to improve the transmission efficiency of the system, fountain code is introduced into cooperative relay communication. In the transmission phase from the source node to the relay node, the data to be transmitted is encoded in the LT code to reduce the amount of feedback information. A bit-level Raptor code information accumulation scheme is proposed in the transmission phase from the relay node to the destination node, Node does not need instantaneous channel state information can make data transmission adaptive channel quality. Theoretical analysis and simulation results show that this scheme reduces the system transmission time and reduces the delay and energy consumption.