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 |
顯示於類別: | 期刊論文 |