论文标题
基于通用原理的联合源通道代码的设计
Design of Joint Source-Channel Codes Based on a Generic Protograph
论文作者
论文摘要
在本文中，我们建议使用通用原理设计联合源通道代码（JSCC）。我们提出了一种通用算法，称为JSCC算法（PEXIT-JSCC算法）的原始外部信息传输，用于分析提出的JSCC的通道阈值。我们还提出了一种源通用原理出口（SGP-EXIT）算法，该算法比广义源源原质外部信息传输（GSP-EXIT）算法更合适，用于评估通用原质的源阈值。此外，提出了一种基于SGP-EXIT和PEXIT-JSCC算法的协作优化方法，以构建具有良好源和频道阈值的通用标记JSCC。最后，我们构建通用的预码JSCC，分析其解码阈值，并根据优化的双预绘图将其理论和错误性能与JSCC系统进行比较。结果表明，我们所提出的代码可以从香农限制和胜过基于双绘画的JSCC的1 dB内达到通道阈值。
In this paper, we propose using a generic protograph to design joint source-channel codes (JSCCs). We present a generalized algorithm, called protograph extrinsic information transfer for JSCC algorithm (PEXIT-JSCC algorithm), for analyzing the channel threshold of the proposed JSCC. We also propose a source generic protograph EXIT (SGP-EXIT) algorithm, which is more appropriate than the generalized source protograph extrinsic information transfer (GSP-EXIT) algorithm, for evaluating the source threshold of a generic protograph. Moreover, a collaborative optimization method based on the SGP-EXIT and PEXIT-JSCC algorithms is proposed to construct generic-protograph JSCCs with good source and channel thresholds. Finally, we construct generic-protograph JSCCs, analyze their decoding thresholds, and compare their theoretical and error performance with JSCC systems based on optimized double-protographs. Results show that our proposed codes can attain channel thresholds within 1 dB from the Shannon limit and outperform double-protograph-based JSCCs.
