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Joint pilot power and pattern design for compressive OFDM channel estimation

Khosravi, M ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1109/LCOMM.2014.2371036
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2015
  4. Abstract:
  5. This letter investigates the deterministic design of pilot power and pattern for sparse channel estimation in OFDM systems based on minimizing the coherence of the DFT sub-matrix. It has been suggested that the pilot pattern forming a cyclic difference set (CDS) or almost difference set (ADS) is optimal. So, we proposed a deterministic procedure that jointly optimized for pattern and power of pilots as a solution. First, pilot patterns forming CDS/ADS were gathered through a search. Then, the power was numerically allocated to the different pilots from all the patterns. Finally, the pilot pattern and power pair leading to minimum coherence was selected from the available pairs. Simulation results demonstrated that the proposed scheme outperformed the existing methods in terms of efficiency
  6. Keywords:
  7. Coherence minimization ; Compressed sensing ; Design ; Orthogonal frequency division multiplexing ; Cyclic difference sets ; Deterministic design ; Difference sets ; OFDM channel estimation ; Pattern designs ; Pilot design ; Pilot pattern ; Sparse channel estimations ; Design for testability
  8. Source: IEEE Communications Letters ; Volume 19, Issue 1 , November , 2015 , Pages 50-53 ; 10897798 (ISSN)
  9. URL: http://ieeexplore.ieee.org/document/6957523/?arnumber=6957523