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提出了一种移动卫星通信多址访问协议S-ALOHA的优化策略──改进的带有信道检测的动态稳定算法,使协议性能在大的动态范围内保持稳定且近似最优。分析了系统各终端处于不同环境以及限制信道输入率的控制策略对性能的影响。通过软件仿真,得出不同情况下信道的性能曲线,并对仿真结果进行了分析。考察了遮蔽对协议能的影响。当输入率较大时,捕获效应能弥补这种影响。
An optimization strategy of S-ALOHA, a multiple access protocol for mobile satellite communications, is proposed - an improved dynamic stability algorithm with channel detection that keeps the protocol performance stable and approximately optimal over a large dynamic range. The influence of the control strategy that each terminal of the system is in different environment and the channel input rate is limited is analyzed. Through software simulation, the performance curve of the channel under different conditions is obtained, and the simulation results are analyzed. Examined the effect of shadowing on the protocol. When the input rate is large, the capture effect can make up for this effect.