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arXiv 2401.00477cs.ITcs.AIcs.SYeess.SYmath.IT
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高斯双向信道编码:线性与基于学习的方法

Coding for Gaussian Two-Way Channels: Linear and Learning-Based Approaches

Motorola Mobility(摩托罗拉公司);Purdue University(普渡大学);School of Electrical, Computer and Energy Engineering(电气、计算机与能源工程学院);Arizona State University(亚利桑那州立大学);Department of Electrical and Computer Engineering(电气与计算机工程学院);University at Buffalo-SUNY(布法罗大学(SUNY))

Junghoon Kim, Taejoon Kim, Anindya Bijoy Das, Seyyedali Hosseinalipour, David J. Love, Christopher G. Brinton

AI总结:

本文针对高斯双向信道,提出线性编码与基于RNN的编码两种双向编码策略,联合设计编解码器以最小化错误概率之和,仿真证明其性能优于传统信道编码,且线性编码适合高信噪比、RNN编码适合低信噪比。

摘要:

尽管用户协作无法提高具有独立噪声的高斯双向信道(GTWCs)的容量,但它可以提高通信可靠性。在本工作中,我们旨在通过联合设计用户的编码器和解码器,最小化错误概率之和,以增强并平衡GTWCs中的通信可靠性。我们首先制定通用的编码/解码函数,其中用户协作通过用户编码过程的耦合来体现。耦合效应使得编码器/解码器设计变得不平凡,需要有效的解码来捕捉这种效应,以及在功率约束下对编码器进行有效的功率管理。为了应对这些挑战,我们提出了两种不同的双向编码策略:线性编码和基于学习的编码。对于线性编码,我们提出了最优线性解码,并讨论了关于用户协作以平衡可靠性的编码新见解。然后,我们提出了一种用于联合编码器/解码器设计的高效算法。对于基于学习的编码,我们引入了一种新颖的基于循环神经网络(RNN)的编码架构,其中我们提出了交互式RNN和用于编码的功率控制层,并且我们将双向RNN与注意力机制结合用于解码。通过仿真,我们表明我们的双向编码方法在总和错误性能方面显著优于传统信道编码方案(不利用用户协作)。我们还证明了我们的线性编码在高信噪比(SNRs)下表现出色,而我们的基于RNN的编码在低SNRs下表现最佳。我们进一步从功率分布、双向编码增益、不同编码速率和块长度增益方面研究了我们的双向编码策略。

英文摘要:

Although user cooperation cannot improve the capacity of Gaussian two-way channels (GTWCs) with independent noises, it can improve communication reliability. In this work, we aim to enhance and balance the communication reliability in GTWCs by minimizing the sum of error probabilities via joint design of encoders and decoders at the users. We first formulate general encoding/decoding functions, where the user cooperation is captured by the coupling of user encoding processes. The coupling effect renders the encoder/decoder design non-trivial, requiring effective decoding to capture this effect, as well as efficient power management at the encoders within power constraints. To address these challenges, we propose two different two-way coding strategies: linear coding and learning-based coding. For linear coding, we propose optimal linear decoding and discuss new insights on encoding regarding user cooperation to balance reliability. We then propose an efficient algorithm for joint encoder/decoder design. For learning-based coding, we introduce a novel recurrent neural network (RNN)-based coding architecture, where we propose interactive RNNs and a power control layer for encoding, and we incorporate bi-directional RNNs with an attention mechanism for decoding. Through simulations, we show that our two-way coding methodologies outperform conventional channel coding schemes (that do not utilize user cooperation) significantly in sum-error performance. We also demonstrate that our linear coding excels at high signal-to-noise ratios (SNRs), while our RNN-based coding performs best at low SNRs. We further investigate our two-way coding strategies in terms of power distribution, two-way coding benefit, different coding rates, and block-length gain.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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