On the use of Walsh domain equalizer for performance enhancement of MIMO-OFDM communication systems

IF 1.7 4区计算机科学 Q3 TELECOMMUNICATIONS

Telecommunication Systems Pub Date : 2024-03-20 DOI:10.1007/s11235-023-01091-5

Khaled Ramadan

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Abstract

The purpose of this article is to investigate the viability of Multi-Carrier Modulation (MCM) systems based on the Fast Walsh Hadamard Transform (FWHT). In addition, a nonlinear Joint Low-Complexity Optimized Zero Forcing Successive Interference Cancellation (JLCOZF-SIC) equalizer is proposed. To that end, general equations for the number of flops of the proposed equalizer and various other equalizers are given. This article discusses the use of Banded Matrix Approximation (BMA) as a technique for reducing complexity. The proposed equalizer uses BMA to accomplish both equalization and co-Carrier Frequency Offset (co-CFO) corrections. In addition, three cases involving the proposed equalizer were investigated. In the first case, diagonal compensation is used. In the second case, BMA compensation is used. In the third case, complete matrix compensation is used. In the presence of frequency offset, noise, and frequency-selective Rayleigh fading environments, analysis and simulation results show that the OFDM-FWHT system with the proposed equalizer outperforms the conventional OFDM system with various linear and nonlinear equalizers.

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论使用沃尔什域均衡器提高 MIMO-OFDM 通信系统的性能

本文旨在研究基于快速沃尔什-哈达玛变换（FWHT）的多载波调制（MCM）系统的可行性。此外，还提出了一种非线性联合低复杂度优化零强迫连续干扰消除（JLCOZF-SIC）均衡器。为此，文章给出了拟议均衡器和其他各种均衡器的翻转次数一般公式。本文讨论了带状矩阵逼近（BMA）作为一种降低复杂性的技术的使用。建议的均衡器使用 BMA 完成均衡和共载波频率偏移（co-CFO）校正。此外，还研究了涉及拟议均衡器的三种情况。第一种情况是使用对角补偿。第二种情况是使用 BMA 补偿。在第三种情况下，使用完全矩阵补偿。分析和仿真结果表明，在存在频率偏移、噪声和频率选择性瑞利衰落的环境下，采用所提均衡器的 OFDM-FWHT 系统优于采用各种线性和非线性均衡器的传统 OFDM 系统。

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

Telecommunication Systems 工程技术-电信学

CiteScore

5.40

自引率

8.00%

发文量

105

审稿时长

6.0 months

期刊介绍： Telecommunication Systems is a journal covering all aspects of modeling, analysis, design and management of telecommunication systems. The journal publishes high quality articles dealing with the use of analytic and quantitative tools for the modeling, analysis, design and management of telecommunication systems covering: Performance Evaluation of Wide Area and Local Networks; Network Interconnection; Wire, wireless, Adhoc, mobile networks; Impact of New Services (economic and organizational impact); Fiberoptics and photonic switching; DSL, ADSL, cable TV and their impact; Design and Analysis Issues in Metropolitan Area Networks; Networking Protocols; Dynamics and Capacity Expansion of Telecommunication Systems; Multimedia Based Systems, Their Design Configuration and Impact; Configuration of Distributed Systems; Pricing for Networking and Telecommunication Services; Performance Analysis of Local Area Networks; Distributed Group Decision Support Systems; Configuring Telecommunication Systems with Reliability and Availability; Cost Benefit Analysis and Economic Impact of Telecommunication Systems; Standardization and Regulatory Issues; Security, Privacy and Encryption in Telecommunication Systems; Cellular, Mobile and Satellite Based Systems.