论文标题
与反馈的可变符号长度通信的自相关和频谱分析
Autocorrelation and Spectrum Analysis for Variable Symbol Length Communications with Feedback
论文作者
论文摘要
可变长度反馈代码可以提供优于固定长度反馈或非反馈代码的优势。这封信的重点是未编码的可变符号长度反馈通信，并分析信号的自相关和频谱。我们为可以通过数值评估的自相关提供了数学表达式。然后，我们通过数值评估基于反馈的通信系统中可变符号长度信号的自相关和频谱，该信号通过将符号长度调整为噪声实现来实现每个符号的目标可靠性。分析和数值结果表明，当平均符号长度固定时，频谱会随SNR而变化，并在高SNR处接近固定长度方案。
Variable-length feedback codes can provide advantages over fixed-length feedback or non-feedback codes. This letter focuses on uncoded variable-symbol-length feedback communication and analyzes the autocorrelation and spectrum of the signal. We provide a mathematical expression for the autocorrelation that can be evaluated numerically. We then numerically evaluate the autocorrelation and spectrum for the variable-symbol-length signal in a feedback-based communication system that attains a target reliability for every symbol by adapting the symbol length to the noise realization. The analysis and numerical results show that the spectrum changes with SNR when the average symbol length is fixed, and approaches the fixed-length scheme at high SNR.
