A novel BEM- based channel estimation algorithm for time variant uplink OFDMA system

Ganji, F ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. Publisher: 2010
  3. Abstract:
  4. IN this paper the effect of different channel estimation approaches in OFDMA uplink system which are based on Basis Expansion Model (BEM) and widely used to consider time varying channels are discussed. It has been shown in previous works that modeling error will be reduced by applying oversampled BEM with cost of increasing sensitivity to noise. This problem will be solved by combining oversampled BEM and MMSE channel estimator with cost of increasing computational complexity. In this paper a novel channel estimation approach is represented in which by combining oversampled BEM and low rank MMSE in frequency domain, almost the same performance as the full rank MMSE has been achieved while computational complexity reduces significantly
  5. Keywords:
  6. MMSE ; OFDMA ; Basis Expansion Model (BEM) ; Basis expansion models ; Channel estimation algorithms ; Frequency domains ; Low rank ; MMSE channel estimator ; Modeling errors ; OFDMA uplinks ; Oversampled ; Time variant ; Time varying channel ; Uplink OFDMA ; Boundary element method ; Channel estimation ; Computational complexity ; Cost reduction ; Estimation ; Frequency division multiple access ; Strategic planning ; Sustainable development ; Frequency estimation
  7. Source: International Conference on Advanced Communication Technology, ICACT, 7 February 2010 through 10 February 2010 ; Volume 2 , Feb , 2010 , Pages 1289-1293 ; 17389445 (ISSN) ; 9788955191455 (ISBN)
  8. URL: http://ieeexplore.ieee.org/document/5440270