卫星通信系统在存在闪烁时的性能

S. An, W. Lindsey
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引用次数: 0

摘要

提出了一种评估卫星通信系统在闪烁和热噪声条件下误码概率性能的方法。在分析仿真中,利用决策变量的概率分布函数来预测各种信道条件下的误码概率。针对信道存储的问题,开发了系统的软件模拟器;该模拟器负责编码、调制、信道存储、噪声、闪烁统计以及交织-去交织系统的设计。对卫星和地面站信号处理的不同方法进行了权衡分析。评估了地面接收机软判决与硬判决维特比译码。给出了卫星信号处理与地面站信号处理的对比结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Satellite communication system performance in the presence of scintillation
The authors demonstrate an approach to evaluating the bit-error probability performance of a satellite communication system operating in the presence of scintillation and thermal noise. The probability distribution function of the decision variable is used in an analytical simulation to predict bit-error probabilities for various channel conditions. With regard to treating the problems due to channel memory, a software simulator of the system has been developed; this simulator accounts for the coding, modulation, channel memory, noise, scintillation statistics, and the interleaver-deinterleaver system design. A tradeoff analysis is made with regard to different approaches concerning signal processing in the satellite and ground station. Soft- vs. hard-decision Viterbi decoding in a ground receiver is evaluated. Results on signal processing in the satellite as compared to that in the ground station are provided.<>
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