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网络编码技术是一种能有效提高网络吞吐量的新技术。但是在实际的无线网络中,数据传输会受到信号衰落的影响,导致误码率增加以及网络吞吐量下降,使得无线网络编码技术的实际性能下降。为了进一步提高无线网络编码的性能,该文分析了Rayleigh衰落信道下网络编码的性能,并将其归纳为一个最优化问题。通过求解该最优化问题,给出了编码节点的最优传输策略,即最优传输功率与最优传输速率。数值解与仿真结果显示:该策略能有效提高网络的吞吐量。
Network coding technology is a new technology that can effectively improve network throughput. However, in actual wireless networks, data transmission is affected by signal fading, resulting in an increase in bit error rate and a decrease in network throughput, resulting in a decrease in the actual performance of wireless network coding technologies. In order to further improve the performance of wireless network coding, this paper analyzes the performance of network coding under Rayleigh fading channel and summarizes it as an optimization problem. By solving the optimization problem, the optimal transmission strategy of coding nodes is given, that is, the optimal transmission power and the optimal transmission rate. The numerical solution and simulation results show that this strategy can effectively improve the network throughput.