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Error Exponents of Optimum Decoding for the Interference Channel

机译:干扰信道最优译码的误差指数

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Exponential error bounds for the finite-alphabet interference channel (IFC) with two transmitter-receiver pairs, are investigated under the random coding regime. Our focus is on optimum decoding, as opposed to heuristic decoding rules that have been used in previous works, like joint typicality decoding, decoding based on interference cancellation, and decoding that considers the interference as additional noise. Indeed, the fact that the actual interfering signal is a codeword and not an independent and identically distributed (i.i.d.) noise process complicates the application of conventional techniques to the performance analysis of the optimum decoder. Using analytical tools rooted in statistical physics, we derive a single-letter expression for error exponents achievable under optimum decoding and demonstrate strict improvement over error exponents obtainable using suboptimal decoding rules, but which are amenable to more conventional analysis.
机译:在随机编码机制下,研究了具有两个收发器对的有限字母干扰信道(IFC)的指数误差范围。与以前的工作中使用的启发式解码规则(例如联合典型解码,基于干扰消除的解码以及将干扰视为其他噪声的解码)不同,我们的重点是优化解码。确实,实际干扰信号是一个码字,而不是一个独立且分布均匀的噪声过程,这一事实使传统技术在最佳解码器性能分析中的应用变得复杂。使用基于统计物理学的分析工具,我们得出了在最佳解码下可实现的误差指数的单字母表达式,并证明了对使用次优解码规则可获得的误差指数的严格改进,但这些均适用于更常规的分析。

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