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Training Sequence Design for Low Complexity Channel Estimation in Transmit Diversity TDS-OFDM System
Fang YANG Kewu PENG Jun WANG Jian SONG Zhixing YANG
IEICE TRANSACTIONS on Communications
Publication Date: 2009/06/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
TDS-OFDM, transmit diversity, pseudo noise (PN) sequence, channel estimation, least squared (LS),
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In this paper, estimation accuracy of channel frequency response (CFR) according to least squared (LS) criterion with two transmit antennas for the time domain synchronous-orthogonal frequency division multiplexing (TDS-OFDM) system is investigated. To minimize the estimation variance, the conditions to guide the pseudo-noise (PN) sequence design are discussed and three training sequence design schemes are proposed accordingly. Simulations show that the proposed PN sequence design scheme is effective, while the implementation complexity for the channel estimation is low.