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Equalization and Carrier Frequency Offset Compensation for Underwater Acoustic OFDM Systems

Author

Listed:
  • K. Ramadan

    (Higher Institute of Engineering, El-Shorouk Academy)

  • M. I. Dessouky

    (Menoufia University)

  • S. Elagooz

    (Higher Institute of Engineering, El-Shorouk Academy)

  • M. Elkordy

    (Menoufia University)

  • F. E. Abd El-Samie

    (Menoufia University)

Abstract

Due to noise enhancement, conventional Zero Forcing (ZF) equalizers are not suitable for wireless Underwater Acoustic (UWA) Orthogonal Frequency Division Multiplexing (OFDM) communication systems. Furthermore, these systems suffer from increasing complexity due to the large number of subcarriers, especially in Multiple-Input Multiple-Output (MIMO) systems. On the other hand, the Minimum Mean Square Error equalizer suffers from high complexity. This type of equalizers needs an estimation of the operating Signal-to-Noise Ratio to work properly. In this paper, we propose a Joint Low-Complexity Regularized ZF equalizer for MIMO UWA-OFDM systems to cope with these problems. The main objective of the proposed equalizer is to enhance the system performance with a lower complexity by performing equalization in two steps. The co-channel interference can be mitigated in the first step. A regularization term is added in the second step to avoid the noise enhancement. Simulation results show that the proposed equalization scheme has the ability to enhance the UWA system performance with low complexity.

Suggested Citation

  • K. Ramadan & M. I. Dessouky & S. Elagooz & M. Elkordy & F. E. Abd El-Samie, 2018. "Equalization and Carrier Frequency Offset Compensation for Underwater Acoustic OFDM Systems," Annals of Data Science, Springer, vol. 5(2), pages 259-272, June.
    • Handle: RePEc:spr:aodasc:v:5:y:2018:i:2:d:10.1007_s40745-017-0127-y
    DOI: 10.1007/s40745-017-0127-y
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