Publication Details

This article was originally published as: Lowe, D & Huang, X, Ultra-wideband MB-OFDM channel estimation with complementary codes, 2006 International Symposium on Communications and Information Technologies (ISCIT), Bangkok, Thailand, 18-20 October 2006. Conference information is available here.


In this paper, we design complementary codesets that significantly improve the quality of channel estimation in orthogonal frequency division multiplexing (OFDM) communication systems, with a focus on the recent MB-OFDM ultra-wideband (UWB) standard. The proposed time-domain OFDM channel estimation technique incurs only a nominal increase in computational complexity and is able to be readily retrofitted into the existing MB-OFDM standard. The underlying complementary codesets, found via an evolutionary algorithm, combine with the existing preamble synchronization sequences to yield asymptotically ideal auto-correlation functions (ACFs). We show how improvements exceeding 1 dB can be achieved in end-to-end packet error rate relative to conventional zero-forcing OFDM equalization.



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