A Generalized Two-Dimensional FFT Precoded Filter Bank Scheme With Low Complexity Equalizers in Time-Frequency Domain

IF 3.4 3区计算机科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS IEEE Access Pub Date : 2023-10-11 DOI:10.1109/ACCESS.2023.3323928

Rogério Pereira Junior;Carlos Aurélio Faria Da Rocha;Bruno S. Chang;Didier Le Ruyet

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Abstract

Recently, the two-dimensional (2D) fast Fourier transform (2D-FFT) filter bank (FB) technique was proposed as an alternative to new wireless communication technologies covering several application scenarios. This technique presents similar characteristics to orthogonal time-frequency space modulation (OTFS), such as lower PAPR and robustness in high mobility scenarios; in addition, thanks to the use of filter bank modulation, the technique has a good spectral localization. In this work, we present the generalization of the 2D-FFT FB system by making changes in the waveform structure to obtain advantages in the symbol detection process. The proposed idea allows the use of low-complexity equalizers in the time-frequency (TF) domain, bringing a good performance/complexity trade-off and obtaining bit error rate (BER) results of the same order than delay-Doppler domain receivers for OTFS. Theoretical and simulation results show that it is possible to obtain a good error performance in high mobility scenarios even using simple equalizers in the TF domain combined with waveform structure adjustments.

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一种时频域低复杂度均衡器的广义二维FFT预编码滤波器组方案

最近，二维（2D）快速傅立叶变换（2D-FFT）滤波器组（FB）技术被提出作为覆盖多个应用场景的新无线通信技术的替代方案。该技术呈现出与正交时频空间调制（OTFS）相似的特性，例如在高移动性场景中较低的PAPR和鲁棒性；此外，由于使用了滤波器组调制，该技术具有良好的频谱定位性能。在这项工作中，我们通过改变波形结构来推广2D-FFT FB系统，以在符号检测过程中获得优势。所提出的思想允许在时频（TF）域中使用低复杂度均衡器，带来良好的性能/复杂度权衡，并获得与OTFS的延迟多普勒域接收机相同数量级的误码率（BER）结果。理论和仿真结果表明，即使在TF域中使用简单的均衡器并结合波形结构调整，也可以在高迁移率场景中获得良好的误差性能。

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来源期刊

IEEE Access COMPUTER SCIENCE, INFORMATION SYSTEMSENGIN-ENGINEERING, ELECTRICAL & ELECTRONIC

CiteScore

9.80

自引率

7.70%

发文量

6673

审稿时长

6 weeks

期刊介绍： IEEE Access® is a multidisciplinary, open access (OA), applications-oriented, all-electronic archival journal that continuously presents the results of original research or development across all of IEEE''s fields of interest. IEEE Access will publish articles that are of high interest to readers, original, technically correct, and clearly presented. Supported by author publication charges (APC), its hallmarks are a rapid peer review and publication process with open access to all readers. Unlike IEEE''s traditional Transactions or Journals, reviews are "binary", in that reviewers will either Accept or Reject an article in the form it is submitted in order to achieve rapid turnaround. Especially encouraged are submissions on: Multidisciplinary topics, or applications-oriented articles and negative results that do not fit within the scope of IEEE''s traditional journals. Practical articles discussing new experiments or measurement techniques, interesting solutions to engineering. Development of new or improved fabrication or manufacturing techniques. Reviews or survey articles of new or evolving fields oriented to assist others in understanding the new area.