標題: Optimal delay estimation for phase-rotated linearly interpolative channel estimation in OFDM and OFDMA systems
作者: Hung, Kun-Chien
Lin, David W.
電子工程學系及電子研究所
電信研究中心
Department of Electronics Engineering and Institute of Electronics
Center for Telecommunications Research
關鍵字: channel estimation;delay estimation;IEEE 802.16e;orthogonal frequency-division multiple access (OFDMA);orthogonal frequency-division multiplexing (OFDM);WiMAX downlink
公開日期: 2008
摘要: We consider the phase-rotated linearly interpolative channel estimation technique for multicarrier transmission. The technique models the channel frequency response between two nearby subcarriers as the product of a linear function and a linear-phase factor, where the linear-phase factor may be equivalently modeled in the time domain as a reference delay dubbed the anchor delay in this work. We show that the performance of the technique is a fourth-order function of the channel path delays and the anchor delay. We derive a method to estimate the optimal anchor delay. Analysis and simulation in a context of Mobile WiMAX downlink transmission show that, with the proposed anchor delay estimate, we can attain better performance in channel estimation than conventional linear interpolation and a previously proposed method of phase-compensated linear interpolation.
URI: http://hdl.handle.net/11536/9910
http://dx.doi.org/10.1109/LSP.2008.919844
ISSN: 1070-9908
DOI: 10.1109/LSP.2008.919844
期刊: IEEE SIGNAL PROCESSING LETTERS
Volume: 15
起始頁: 349
結束頁: 352
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