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Proceedings Paper

Reduced dimension equalizer and interference canceller for MIMO-OFDM
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Paper Abstract

In this paper, an interference cancellation and equalization method is proposed for a multiple-input, multipleoutput orthogonal frequency division multiplexing (MIMO-OFDM) system. Standard equalization techniques such as zero-forcing (ZF) and adaptive array processing techniques such as per-tone or time-domain equalization may require large amounts of training and memory for storage of the weight coefficients. In a MIMO-OFDM system with N carriers, equalizers at each antenna are characterized by the solution space associated with an underdetermined system of linear equations. A structured per-tone technique is proposed that utilizes the extra degrees of freedom in order to cancel interfering signals; the resultant equalizers (weight vectors) have lengths significantly smaller than N, but at least as long as the channel impulse response.

Paper Details

Date Published: 3 April 2008
PDF: 10 pages
Proc. SPIE 6980, Wireless Sensing and Processing III, 698003 (3 April 2008); doi: 10.1117/12.778688
Show Author Affiliations
Chad C. Lau, Purdue Univ. (United States)
Michael D. Zoltowski, Purdue Univ. (United States)


Published in SPIE Proceedings Vol. 6980:
Wireless Sensing and Processing III
Sohail A. Dianat; Michael D. Zoltowski, Editor(s)

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