Performance of Orthogonal Delay-Doppler Division Multiplexing Modulation With Imperfect Channel Estimation

IF 8.3 2区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Communications Pub Date : 2024-10-29 DOI:10.1109/TCOMM.2024.3487797

Kehan Huang;Min Qiu;Jun Tong;Jinhong Yuan;Hai Lin

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Abstract

The orthogonal delay-Doppler division multiplexing (ODDM) modulation is a recently proposed multi-carrier modulation that features a realizable pulse orthogonal with respect to the delay-Doppler (DD) plane’s fine resolutions. In this paper, we investigate the performance of ODDM systems with imperfect channel estimation considering three detectors, namely the message passing algorithm (MPA) detector, iterative maximum-ratio combining (MRC) detector, and successive interference cancellation with minimum mean square error (SIC-MMSE) detector. We derive the post-equalization signal-to-interference-plus-noise ratio (SINR) for MRC and SIC-MMSE and analyze their bit error rate (BER) performance. Based on this analysis, we propose the MRC with subtractive dither (MRC-SD) and soft SIC-MMSE initialized MRC (SSMI-MRC) detector to improve the BER of iterative MRC. Our results demonstrate that soft SIC-MMSE consistently outperforms the other detectors in BER performance under perfect and imperfect CSI. While MRC exhibits a BER floor above

$10^{-5}$

, MRC-SD effectively lowers the BER with a negligible increase in detection complexity. SSMI-MRC achieves better BER than hard SIC-MMSE with the same detection complexity order. Additionally, we show that MPA has an error floor and is sensitive to imperfect CSI.

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具有不完善信道估计的正交延迟-多普勒分频多路复用调制的性能

正交延迟多普勒分复用（ODDM）调制是最近提出的一种多载波调制，其特点是与延迟多普勒（DD）平面的精细分辨率具有可实现的脉冲正交。本文研究了考虑三种检测器的不完全信道估计ODDM系统的性能，即消息传递算法（MPA）检测器、迭代最大比组合（MRC）检测器和最小均方误差连续干扰抵消（SIC-MMSE）检测器。推导了均衡后MRC和SIC-MMSE的信噪比（SINR），并分析了它们的误码率（BER）性能。在此基础上，我们提出了带有减抖动的MRC （MRC- sd）和软SIC-MMSE初始化MRC （SSMI-MRC）检测器来提高迭代MRC的误码率。我们的研究结果表明，在完美和不完美的CSI下，软SIC-MMSE在误码率性能上始终优于其他探测器。MRC的误码率高于$10^{-5}$，而MRC- sd有效地降低了误码率，而检测复杂性的增加可以忽略不计。在相同检测复杂度的情况下，SSMI-MRC比硬SIC-MMSE具有更好的误码率。此外，我们发现MPA具有误差下限，并且对不完全CSI敏感。

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 Transactions on Communications 工程技术-电信学

CiteScore

16.10

自引率

8.40%

发文量

528

审稿时长

4.1 months

期刊介绍： The IEEE Transactions on Communications is dedicated to publishing high-quality manuscripts that showcase advancements in the state-of-the-art of telecommunications. Our scope encompasses all aspects of telecommunications, including telephone, telegraphy, facsimile, and television, facilitated by electromagnetic propagation methods such as radio, wire, aerial, underground, coaxial, and submarine cables, as well as waveguides, communication satellites, and lasers. We cover telecommunications in various settings, including marine, aeronautical, space, and fixed station services, addressing topics such as repeaters, radio relaying, signal storage, regeneration, error detection and correction, multiplexing, carrier techniques, communication switching systems, data communications, and communication theory. Join us in advancing the field of telecommunications through groundbreaking research and innovation.