Optimization of Delayed Bit-Interleaved Coded Modulation in the High-SNR Regime

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2024-09-20 DOI:10.1109/LCOMM.2024.3464873

Harindu Jayarathne;Dileepa Marasinghe;Nandana Rajatheva;Matti Latva-Aho

引用次数: 0

Abstract

In this letter, we investigate the capacity of delay schemes in delayed bit-interleaved coded modulation (DBICM) at high signal-to-noise ratios (SNR) using alternative methods to numerical integration. A closed-form formula is derived to approximate the DBICM capacity at high SNR. For Gray codes, DBICM capacity is proven as asymptotically optimal irrespective of the delay scheme and we further characterize the minute variations in finite SNR values. Compared to BICM using the binary reflected Gray Code, an improvement of 0.1 dB in the BER performance is achieved using a non-Gray bit-labeling combined with its optimized DBICM delay scheme.

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高 SNR 状态下的延迟比特交织编码调制优化

在这封信中，我们研究了延迟比特交织编码调制（DBICM）延迟方案在高信噪比（SNR）下的容量，并使用了数字积分的替代方法。得出了一个闭式公式来近似计算高信噪比下的 DBICM 容量。对于灰色编码，无论延迟方案如何，DBICM 容量都被证明是渐进最优的，我们还进一步描述了有限信噪比值下的微小变化。与使用二进制反射灰度编码的 BICM 相比，使用非灰度比特标记及其优化的 DBICM 延迟方案，误码率性能提高了 0.1 dB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.