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Using Superposition Codebooks and Partial Decode-and-Forward in Low-SNR Parallel Relay Networks

机译:在低SNR并行中继网络中使用叠加码本和部分解码转发

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摘要

A new communication scheme for Gaussian parallel relay networks based on superposition coding and partial decoding at the relays is presented. Some specific examples are proposed in which two codebook layers are superimposed. The first-level codebook is constructed with symbols from a binary or ternary alphabet, while the second-level codebook is composed of codewords chosen with Gaussian symbols. The new communication scheme is a generalization of decode-and-forward, amplify-and-forward, and bursty-amplify-and-forward. The asymptotic low-signal-to-noise-ratio regime is studied using achievable rates and minimum energy-per-bit as performance metrics. It is shown that the new scheme outperforms all previously known schemes for some channels and parameter ranges.
机译:提出了一种基于高斯并行中继的叠加编码和部分解码的新通信方案。提出了一些具体示例,其中两个码本层被叠加。第一级代码簿由二进制或三进制字母的符号构成,而第二级代码簿由使用高斯符号选择的代码字组成。新的通信方案是对解码转发,放大转发和突发放大转发的概括。使用可达到的速率和最小单位能量能耗作为性能指标,研究了渐近的低信号噪声比方案。结果表明,对于某些通道和参数范围,新方案优于所有先前已知的方案。

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