时序失调下OFDM子带全双工交叉链路干扰的抑制

IF 5.5 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS

IEEE Wireless Communications Letters Pub Date : 2025-06-17 DOI:10.1109/LWC.2025.3580585

Badr Eddine Ouakouak;Salah Eddine Zegrar;Hüseyin Arslan

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引用次数: 0

摘要

子带全双工（SBFD）通信通过在同一频段内实现上行链路（UL）和下行链路（DL）同时传输，已成为提高现代无线网络频谱效率的一种有前途的范例。然而，当UL和DL正交频分复用（OFDM）信号之间的时序失调（TMA）超过循环前缀（CP）持续时间时，来自用户设备（UE）的UL子载波会泄漏到DL子载波中，从而导致严重的交联干扰（CLI）。为了解决这些限制，我们建议对SBFD插槽使用零填充(ZP)-OFDM波形。ZP-OFDM的固有结构允许对接收到的帧进行块处理，即使在存在TMA的情况下也能有效抑制ue间的CLI，从而消除了在UL和DL子带之间需要保护带的需要，大大提高了SBFD系统的实用性。

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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Mitigating Cross-Link Interference in OFDM Subband Full Duplex Under Timing Misalignment

Subband full-duplex (SBFD) communication has emerged as a promising paradigm for enhancing spectral efficiency in modern wireless networks by enabling simultaneous uplink (UL) and downlink (DL) transmissions within the same frequency band. However, when timing misalignment (TMA) between UL and DL orthogonal frequency-division multiplexing (OFDM) signals exceeds the cyclic prefix (CP) duration, UL subcarriers from user equipment (UE) leak into the DL subcarriers, resulting in substantial cross-link interference (CLI). To address these limitations, we propose the use of zero-padding (ZP)-OFDM waveform for the SBFD slots. The inherent structure of ZP-OFDM allows for block processing of the received frame, enabling effective suppression of inter-UE CLI even in the presence of TMA, thereby eliminating the need for a guard band between the UL and DL sub-bands and significantly enhancing the practicality of SBFD systems.

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来源期刊

IEEE Wireless Communications Letters Engineering-Electrical and Electronic Engineering

CiteScore

12.30

自引率

6.30%

发文量

481

期刊介绍： IEEE Wireless Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of wireless communications. 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 wireless communication systems.