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Computer Science > Information Theory

arXiv:1102.5381 (cs)
[Submitted on 26 Feb 2011]

Title:Blind Adaptive Subcarrier Combining Technique for MC-CDMA Receiver in Mobile Rayleigh Channel

Authors:Indu Shakya, Falah H. Ali, Elias Stipidis
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Abstract:A new subcarrier combining technique is proposed for MC -CDMA receiver in mobile Rayleigh fading channel. It exploits the structure formed by repeating spreading sequences of users on different subcarriers to simultaneously suppress multiple access interference (MAI) and provide implicit channel tracking without any knowledge of the channel amplitudes or training sequences. This is achieved by adaptively weighting each subcarrier in each symbol period by employing a simple gradient descent algorithm to meet the constant modulus (CM) criterion with judicious selection of step-size. Improved BER and user capacity performance are shown with similar complexity in order of O(N) compared with conventional maximum ratio combining and equal gain combining techniques even under high channel Doppler rates.
Subjects: Information Theory (cs.IT)
Cite as: arXiv:1102.5381 [cs.IT]
  (or arXiv:1102.5381v1 [cs.IT] for this version)
  https://doi.org/10.48550/arXiv.1102.5381

Submission history

From: Indu Shakya [view email]
[v1] Sat, 26 Feb 2011 00:48:56 UTC (323 KB)
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