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Low-Rate Predictive Feedback for the OFDM MIMO Broadcast Channel

  • Nevio Benvenuto
  • Ermanna Conte
  • Stefano Tomasin
  • Matteo Trivellato
Part of the Signals and Communication Technology book series (SCT)

For a frequency division duplexing (FDD) cellular system, the downlink channel state information (CSI) has to be fed back by mobile terminals (MTs) in order to perform beamforming and scheduling at base station (BS). In this paper, for an orthogonal frequency division multiplexing (OFDM) modulation format, we propose a novel CSI feedback strategy based on the prediction of channel variations. Indeed, quantization of CSI and feedback signalling are jointly designed in order to obtain a low rate feedback signal. Also, an user selection method is devised to allocate users across the subcarriers. Simulations for a 3G long term evolution scenario show a significant performance improvement achieved by the predictive strategy with respect to existing techniques.

Keywords

Orthogonal Frequency Division Multiplex Channel State Information Mobile Terminal Orthogonal Frequency Division Multiplex Symbol MIMO Channel 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Nevio Benvenuto
    • 1
  • Ermanna Conte
    • 1
  • Stefano Tomasin
    • 1
  • Matteo Trivellato
    • 1
  1. 1.Department of Information EngineeringUniversity of PadovaItaly

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