Deterministic pilot sequences for sparse channel estimation in OFDM systems

Lorne Applebaum, Waheed U. Bajwa, A. Robert Calderbank, Jarvis D Haupt, Robert Nowak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

23 Scopus citations

Abstract

This paper examines the problem of multipath channel estimation in single-antenna orthogonal frequency division multiplexing (OFDM) systems. In particular, we study the problem of pilot assisted channel estimation in wideband OFDM systems, where the time-domain (discrete) channel is approximately sparse. Existing works on this topic established that techniques from the compressed sensing literature can yield accurate channel estimates using a relatively small number of pilot tones, provided the pilots are selected randomly. Here, we describe a general purpose procedure for deterministic selection of pilot tones to be used for channel estimation, and establish guarantees for channel estimation accuracy using these sequences along with recovery techniques from the compressed sensing literature. Simulation results are presented to demonstrate the effectiveness of the proposed procedure in practice.

Original languageEnglish (US)
Title of host publication17th DSP 2011 International Conference on Digital Signal Processing, Proceedings
DOIs
StatePublished - Sep 29 2011
Event17th International Conference on Digital Signal Processing, DSP 2011 - Corfu, Greece
Duration: Jul 6 2011Jul 8 2011

Publication series

Name17th DSP 2011 International Conference on Digital Signal Processing, Proceedings

Other

Other17th International Conference on Digital Signal Processing, DSP 2011
CountryGreece
CityCorfu
Period7/6/117/8/11

Keywords

  • Channel estimation
  • OFDM systems
  • compressed sensing
  • deterministic RIP matrices

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