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 ultrawideband (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.
|Title of host publication||2006 International Symposium on Communications and Information Technologies, ISCIT|
|Number of pages||6|
|Publication status||Published - 2006|
|Event||2006 International Symposium on Communications and Information Technologies, ISCIT - Bangkok, Thailand|
Duration: 18 Oct 2006 → 20 Oct 2006
|Other||2006 International Symposium on Communications and Information Technologies, ISCIT|
|Period||18/10/06 → 20/10/06|