White Papers

Channel Estimation for D-BLAST OFDM Systems

Category: Software and Web Development, Networking and Communications

Overview Diagonal Bell Laboratories Layered Space-Time (DBLAST) structure offers a low complexity solution to realize the attractive capacity of Multiple-Input And Multiple-Output (MIMO) systems. This paper applies D-BLAST in Orthogonal Frequency Division Multiplexing (OFDM) systems and addresses the issue of channel estimation. Different from other MIMO-OFDM, where symbols at all tones are always available for decision-directed channel estimation, in D-BLAST OFDM, the authors update estimated channel parameters each time a layer is detected with a Least Square (LS) approach, using a pieced combination of received signals at previous and current OFDM blocks. The initial estimate is further refined by a robust estimator to exploit the time correlation of channel parameters among OFDM blocks. Computer simulation results show the performance improvement over block-wise channel estimation.

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Publisher: Georgia Institute of Technology
File Format: PDF
Date Published: Apr 13, 2007
Format: White Papers
Topics: Wireless, Wireless LAN, Mobile - Wireless Communications

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