On the performance of joint low‐complexity equalization and CFO compensation for SISO‐OFDM communication systems with chaotic interleaving and DCT,International Journal of Communication Systems

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On the performance of joint low‐complexity equalization and CFO compensation for SISO‐OFDM communication systems with chaotic interleaving and DCT
International Journal of Communication Systems ( IF 1.7 ) Pub Date : 2021-01-04 , DOI: 10.1002/dac.4585
Khaled Ramadan ₁ , Abdulrahman Alturki ₂ , Moawad I. Dessouky ₃ , Fathi E. Abd El‐Samie _{3,

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Affiliation

The implementation of the Orthogonal Frequency Division Multiplexing (OFDM) can be achieved using Inverse Discrete Cosine Transform (IDCT), and DCT instead of Inverse Discrete Fourier Transform (IDFT), and DFT. The Carrier Frequency Offset (CFO) is the main issue of the OFDM system. One of the tools to mitigate the CFO effect and improve the Bit‐Error‐Rate (BER) performance is the equalization procedure. Also, the 1‐Dimension (1‐D), and 2‐Dimension (2‐D) burst errors can be mitigated using a chaotic interleaver in the OFDM system. This consequently improves the BER performance. In this paper, we propose a Joint Low‐Complexity Regularized Linear Zero Forcing (JLCRLZF) equalizer for the OFDM system based on DCT in addition to a chaotic interleaving scheme. The proposed equalizer depends on the concept of the banded‐matrix approximation, and jointly performs the equalization and CFO compensation processes. Simulation results ensure the importance of the proposed JLCRLZF equalizer compared to other algorithms.

中文翻译：

具有混沌交织和DCT的SISO-OFDM通信系统的联合低复杂度均衡和CFO补偿性能

可以使用离散余弦逆变换（IDCT）和DCT代替离散傅里叶逆变换（IDFT）和DFT来实现正交频分复用（OFDM）。载波频率偏移（CFO）是OFDM系统的主要问题。减轻CFO效果并改善误码率（BER）性能的工具之一是均衡过程。同样，可以使用OFDM系统中的混沌交织器来缓解一维（1-D）和二维（2-D）突发错误。因此，这提高了BER性能。在本文中，我们提出了一种基于混沌交织方案的基于DCT的OFDM系统联合低复杂度正则化线性零强迫（JLCRLZF）均衡器。拟议的均衡器取决于带状矩阵近似的概念，并共同执行均衡和CFO补偿流程。与其他算法相比，仿真结果确保了所提出的JLCRLZF均衡器的重要性。

更新日期：2021-02-03

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