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Proceedings Paper

Approximate best linear unbiased channel estimation for multi-antenna frequency selective channels with applications to digital TV systems
Author(s): Serdar Ozen; Christopher Pladdy; Sreenivasa M. Nerayanuru; Mark J. Fimoff; Michael D. Zoltowski
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Paper Abstract

We provide an iterative and a non-iterative channel impulse response (CIR) estimation algorithm for communication receivers with multiple-antenna. Our algorithm is best suited for communication systems which utilize a periodically transmitted training sequence within a continuous stream of information symbols, and the receivers for this particular system are expected work in a severe frequency selective multipath environment with long delay spreads relative to the length of the training sequence. The iterative procedure calculates the (semi-blind) Best Linear Unbiased Estimate (BLUE) of the CIR. The non-iterative version is an approximation to the BLUE CIR estimate, denoted by a-BLUE, achieving almost similar performance, with much lower complexity. Indeed we show that, with reasonable assumptions, a-BLUE channel estimate can be obtained by using a stored copy of a pre-computed matrix in the receiver which enables the use of the initial CIR estimate by the subsequent equalizer tap weight calculator. Simulation results are provided to demonstrate the performance of the novel algorithms for 8-VSB ATSC Digital TV system. We also provide a simulation study of the robustness of the a-BLUE algorithm to timing and carrier phase offsets.

Paper Details

Date Published: 10 August 2004
PDF: 12 pages
Proc. SPIE 5440, Digital Wireless Communications VI, (10 August 2004); doi: 10.1117/12.543164
Show Author Affiliations
Serdar Ozen, Izmir Institute of Technology (Turkey)
Zenith Electronics Corp. (United States)
Christopher Pladdy, Zenith Electronics Corp. (United States)
Sreenivasa M. Nerayanuru, Zenith Electronics Corp. (United States)
Mark J. Fimoff, Zenith Electronics Corp. (United States)
Michael D. Zoltowski, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 5440:
Digital Wireless Communications VI
Raghuveer M. Rao; Sohail A. Dianat; Michael D. Zoltowski, Editor(s)

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