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关于不完美的参考信号阶段恢复对受TWDP色影响的PSK系统性能的影响
Goran T Djordjevic1, Dejan N Milic1, Bata Vasic1
1Faculty of Electronic Engineering, University of Nis, 18104 Nis, Serbia.
Entropy (Basel, Switzerland)
|September 28, 2023
概括
通信通道中的不完善相位估计显著影响比特错误率和相互信息,特别是在双波扩散功率 (TWDP) 色下. 阶段噪声是影响误差底和整体信号性能的关键因素.
科学领域:
- 电气工程 电气工程
- 信息理论 信息理论
- 无线通信无线通信
背景情况:
- 通信系统容易受到通道损害的影响,例如色和噪音.
- 准确的相位估计对于可靠的信号检测至关重要.
- 双波扩散功率 (TWDP) 模型捕捉了具有主导视线和扩散组件的复杂传播环境.
研究的目的:
- 分析不完美的相位估计对比特错误率 (BER) 和相互信息 (MI) 的影响.
- 为了研究TWDP色通道下的性能与热噪声.
- 开发用于估计误差底和可接受的信号噪声比 (SNR) 范围的方法,用于多层次相位移键 (PSK) 信号.
主要方法:
- 复合接收信号相的概率密度函数 (PDF) 的分析表达式的推导,使用富里埃数列.
- 对BER表达式的数值评估.
- 开发用于误差底值估计的分析,数值和模拟方法.
- 蒙特卡洛模拟用于评估MI的各种调制顺序 (2,4,8) 和评估硬件缺陷.
主要成果:
- 导出了信号阶段PDF和BER的新分析表达式.
- 开发了有效的方法来估计误差底和可接受的SNR范围.
- 在BER,MI,TWDP通道参数,SNR和相位噪声标准偏差之间发现了直接相关性.
- 阶段噪声显著影响TWDP通道中的误差底值和相互信息.
结论:
- 不完美的相位估计严重降低了通信系统的性能,特别是BER和MI.
- 阶段噪声是影响TWDP环境中的误差底值和整体通道容量的主导因素.
- 该研究为设计在复杂的色条件下运行的强大的通信系统提供了宝贵的见解.
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