反馈时延对短波跨层通信吞吐率影响

Feedback Delay Impact theThroughput of the Cross-layer Design for HF Communication

针对短波跨层通信系统中反馈延时不能忽略的问题,研究了反馈延时对系统吞吐率所产生的影响。首先研究不同系统中反馈延时由于增大总的传输时间,带来吞吐率的下降。其次分析反馈延时对接收端信噪比估计的有效性影响,带来传输模式选择上的误差,影响系统的吞吐率性能。通过理论计算和仿真验证表明了反馈延时对吞吐率影响的程度。

As the the feedback delay problem can not be ignored in HF cross-layer communication system. The influence of the feedback delay on the throughput was studied. First the feedback delay would reduce the throughput by increasing the total transmission time delay. Second the feedback delay would bring error to the SNR estimate in receiver, Degade the throughput. Then the theoretical analyse and simulated research had been made to study the degree of the impact by feedback delay on throughput.