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Bandwidth and Power Efficiency Considerations for Optimal Training in OFDM

Overview Orthogonal Frequency Division Multiplexing (OFDM) has been adopted by many high speed transmission standards. Pilot Tone Assisted Modulation (PTAM) is a well known technique to estimate the Channel State Information (CSI) in OFDM but is not bandwidth efficient. To achieve high bandwidth efficiency, the paper proposes to carry out superimposed training with techniques described in this paper to improve the quality of the CSI estimate. It is well known that OFDM signals have high Peak-to-Average Power ratios (PARs) and are thus not power efficient. To improve the power efficiency, the authors employ a blind SeLected Mapping (SLM) PAR reduction method in conjunction with superimposed training.

Further White Paper Details
Publisher	Georgia Institute of Technology	File Format	PDF
Date Published	May 2005
Format	White Papers
Topics	Wireless LAN, Bandwidth Issues, Mobile - Wireless Communications

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