Hu Rong, Zhang Haonan, Yang Huan
School of Intelligence Technology, Geely University of China, Chengdu 610000, China.
School of Information Science and Technology, Southwest JiaoTong University, Chengdu 610031, China.
Entropy (Basel). 2024 Jul 30;26(8):651. doi: 10.3390/e26080651.
Relay channels capture the essence of several important communication scenarios such as sensor network and satellite communication. In this paper, first, we propose an efficient coding scheme for an additive white Gaussian noise (AWGN) relay channel in the presence of AWGN feedback, which generalizes the conventional scheme for the AWGN relay channel with noiseless feedback by introducing a lattice-based strategy to eliminate the impact of the feedback channel noise on the performance of the original scheme. Next, we further extend the proposed scheme to the multi-input single-output (MISO) fading relay channel (FRC) with noisy feedback. The key to this extension is to use a pre-coding strategy to transform the MISO channel into a single-input single-output (SISO) channel and applying a two-dimensional lattice coding strategy to deal with the feedback fading channel noise. Finally, we analyze the security performance of our proposed scheme in several cases, and the results of this paper are further illustrated by numerical examples.
中继信道抓住了诸如传感器网络和卫星通信等几个重要通信场景的本质。在本文中，首先，我们针对存在加性高斯白噪声（AWGN）反馈的AWGN中继信道提出了一种高效编码方案，该方案通过引入基于格的策略来消除反馈信道噪声对原方案性能的影响，从而推广了具有无噪声反馈的AWGN中继信道的传统方案。接下来，我们将所提出的方案进一步扩展到具有噪声反馈的多输入单输出（MISO）衰落中继信道（FRC）。这种扩展的关键是使用预编码策略将MISO信道转换为单输入单输出（SISO）信道，并应用二维格编码策略来处理反馈衰落信道噪声。最后，我们分析了所提方案在几种情况下的安全性能，本文的结果通过数值示例进一步说明。
