Joint Estimation of CSI and IQ Imbalance, and Compensation of IQ Imbalance in Spatialy Multiplexed MIMO-OFDM Receivers

Year : 2025 | Volume : 12 | Issue : 02 | Page : 11 17
    By

    Harikrushna Rathod,

  • Smith Thavalapill,

  • Purvang Dalal,

  • Sohil Dabhi,

  • Jitendra Shah,

  • Vasim Vohra,

  1. Assistant Professor, Department of Electronics and Communication Engineering, Dharmsinh Desai University, Nadiad, Gujarat, India
  2. Assistant Professor, Department of Electronics and Communication Engineering, Dharmsinh Desai University, Nadiad, Gujarat, India
  3. Professor, Department of Electronics and Communication Engineering, Dharmsinh Desai University, Nadiad, Gujarat, India
  4. Assistant Professor, Department of Electronics and Communication Engineering, Dharmsinh Desai University, Nadiad, Gujarat, India
  5. Assistant Professor, Department of Electronics and Communication Engineering, Dharmsinh Desai University, Nadiad, Gujarat, India
  6. Assistant Professor, Department of Electronics and Communication Engineering, Dharmsinh Desai University, Nadiad, Gujarat, India

Abstract

This study presents a novel method for estimating Channel State Information (CSI) and IQ imbalance and compensating IQ imbalance in a spatially multiplexed MIMO OFDM receiver. Our approach integrates estimation of IQ imbalance with CSI estimation using an OFDM training frame, thus eliminating the need for additional pilot symbols for IQ imbalance estimation. This technique streamlines the process and avoids extra overhead. We conducted simulations on a 2×2 spatially multiplexed MIMO-OFDM system to evaluate the performance of our method. The findings reveal a substantial decrease in Bit Error Rate (BER), emphasizing the effectiveness of the proposed method in enhancing the precision and dependability of MIMO-OFDM systems. This improvement indicates that the approach can significantly boost communication quality in modern wireless systems. The method stands out by delivering these gains without introducing additional system complexity or consuming extra resources, making it an ideal solution for practical deployment. By maintaining efficiency and minimizing overhead, it supports better performance in real-world scenarios where resource constraints are critical. Overall, the results validate the approach as a reliable and scalable solution, contributing to the advancement of robust and efficient wireless communication technologies essential for meeting growing data demands and maintaining signal integrity.

Keywords: Multiple input multiple output orthogonal frequency division multiplexing (MIMO- OFDM), channel state information (CSI), in phase and quadrature-phase (IQ) imbalance

[This article belongs to Journal of Microwave Engineering and Technologies ]

How to cite this article:
Harikrushna Rathod, Smith Thavalapill, Purvang Dalal, Sohil Dabhi, Jitendra Shah, Vasim Vohra. Joint Estimation of CSI and IQ Imbalance, and Compensation of IQ Imbalance in Spatialy Multiplexed MIMO-OFDM Receivers. Journal of Microwave Engineering and Technologies. 2025; 12(02):11-17.
How to cite this URL:
Harikrushna Rathod, Smith Thavalapill, Purvang Dalal, Sohil Dabhi, Jitendra Shah, Vasim Vohra. Joint Estimation of CSI and IQ Imbalance, and Compensation of IQ Imbalance in Spatialy Multiplexed MIMO-OFDM Receivers. Journal of Microwave Engineering and Technologies. 2025; 12(02):11-17. Available from: https://journals.stmjournals.com/jomet/article=2025/view=215464


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Regular Issue Subscription Original Research
Volume 12
Issue 02
Received 06/05/2025
Accepted 09/05/2025
Published 26/06/2025
Publication Time 51 Days
183

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