A novel hybrid approach to improve performance of frequency division duplex systems with linear precoding

  • Authors:

  • Paula M. Castro;José A. García-Naya;Daniel Iglesia;Adriana Dapena

  • Affiliations:

  • Department of Electronics and Systems, University of A Coruña, Spain;Department of Electronics and Systems, University of A Coruña, Spain;Department of Electronics and Systems, University of A Coruña, Spain;Department of Electronics and Systems, University of A Coruña, Spain

  • Venue:
  • HAIS'10 Proceedings of the 5th international conference on Hybrid Artificial Intelligence Systems - Volume Part II
  • Year:
  • 2010

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Abstract

Linear precoding is an attractive technique to combat interference in multiple-input multiple-output systems because it reduces costs and power consumption in the receiver equipment Most of the frequency division duplex systems with linear precoding acquire the channel state information at the receiver by using supervised algorithms Such algorithms make use of pilot symbols periodically sent by the transmitter In a later step, the channel state information is sent to the transmitter side through a limited feedback channel. In order to reduce the overhead inherent to the periodical transmission of training data, we propose to acquire the channel state information by combining supervised and unsupervised algorithms, leading to a hybrid and more efficient approach Simulation results show that the performance achieved with the proposed scheme is clearly better than that with standard algorithms.