Joint Estimation of CSI and IQ Imbalance & Compensation of IQ imbalance in Spatially Multiplexed MIMO-OFDM Receivers

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This is an unedited manuscript accepted for publication and provided as an Article in Press for early access at the author’s request. The article will undergo copyediting, typesetting, and galley proof review before final publication. Please be aware that errors may be identified during production that could affect the content. All legal disclaimers of the journal apply.

Year : 2025 | Volume : 12 | 02 | Page : –
    By

    Harikrushna Rathod,

  • Smith Thavalapill,

  • Purvang Dalal,

  • Sohil Dabhi,

  • Jitendra Shah,

  • Vasim Vohra,

  1. Assistant professor, Electronics & Communication Department, Dharmsinh Desai University, Nadiad, India, Gujarat, India
  2. Assistant Professor, Electronics & Communication Department, Dharmsinh Desai University, Nadiad, India, Gujarat, India
  3. Professor, Electronics & Communication Department, Dharmsinh Desai University, Nadiad, India, Gujarat, India
  4. Assistant Professor, Electronics & Communication Department, Dharmsinh Desai University, Nadiad, India, Gujrat, India
  5. Associate Professor, Electronics & Communication Department, Dharmsinh Desai University, Nadiad, India, Gujrat, India
  6. Associate Professor, Electronics & Communication Department, Dharmsinh Desai University, Nadiad, India, Gujrat, India

Abstract

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This paper 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.

How to cite this article:
Harikrushna Rathod, Smith Thavalapill, Purvang Dalal, Sohil Dabhi, Jitendra Shah, Vasim Vohra. Joint Estimation of CSI and IQ Imbalance & Compensation of IQ imbalance in Spatially Multiplexed MIMO-OFDM Receivers. Journal of Microwave Engineering and Technologies. 2025; 12(02):-.
How to cite this URL:
Harikrushna Rathod, Smith Thavalapill, Purvang Dalal, Sohil Dabhi, Jitendra Shah, Vasim Vohra. Joint Estimation of CSI and IQ Imbalance & Compensation of IQ imbalance in Spatially Multiplexed MIMO-OFDM Receivers. Journal of Microwave Engineering and Technologies. 2025; 12(02):-. Available from: https://journals.stmjournals.com/jomet/article=2025/view=0


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Ahead of Print Subscription Original Research
Volume 12
02
Received 06/05/2025
Accepted 09/06/2025
Published 26/06/2025
Publication Time 51 Days
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