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Joint MAP Detection for OFDM in Presence of Phase Noise from Free Running and Phase Locked Loop Oscillator

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Abstract

This paper addresses a statistically optimal joint maximum a posteriori (MAP) data detection and phase noise (PHN) estimation algorithm for iterative orthogonal frequency division multiplexing (OFDM) receivers, used for high speed and high spectral efficient wireless communication systems. First the cost function for data detection in presence of PHN is formulated with MAP criterion and is optimized further. The optimization is performed in frequency domain with proposed multidimensional circulatory gradient descent algorithm. With reduced computational complexity, the proposed optimization incorporates the statistics of PHN spectral components in prior. The condition of small PHN is relaxed in the proposed algorithm to achieve near optimal performance. Two different models for time varying PHN: produced by free running oscillator and phase locked loop (PLL) oscillator, are presented and implemented for proposed OFDM receiver. Simulation results demonstrate that the proposed optimization achieves “NO PHN” performance for both the PHN models even under multipath channel fading.

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Authors and Affiliations

  1. Department of Electronics and Communication, Malaviya National Institute of Technology, Jaipur, India

    Kamayani Shrivastav & R. P. Yadav

  2. Department of Mathematics, Indian Institute of Information Technology, Kota, Kota, India

    K. C. Jain

Authors
  1. Kamayani Shrivastav
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  2. R. P. Yadav
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  3. K. C. Jain
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Correspondence to Kamayani Shrivastav.

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Shrivastav, K., Yadav, R.P. & Jain, K.C. Joint MAP Detection for OFDM in Presence of Phase Noise from Free Running and Phase Locked Loop Oscillator. Wireless Pers Commun 109, 563–577 (2019). https://doi.org/10.1007/s11277-019-06579-5

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  • DOI: https://doi.org/10.1007/s11277-019-06579-5

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