標題: | Maximum-likelihood estimation of frequency and time offsets in OFDM systems with multiple sets of identical data |
作者: | Cheng, MH Chou, CC 電控工程研究所 Institute of Electrical and Control Engineering |
關鍵字: | IEEE 802.11a;maximum-likelihood (ML) estimation;orthogonal frequency-division multiplexing (OFDM) |
公開日期: | 1-Jul-2006 |
摘要: | This paper generalizes the existing algorithm for the maximum-likelihood (NIL) estimation of frequency and time offsets in orthogonal frequency-division multiplexing (OFDM) systems using from two sets to multiple sets of identical data. The algorithm is derived by the application of the matrix inversion lemma; the Cramer-Rao bound for estimation of the frequency offset is also obtained. For reducing realization complexity, a simplified algorithm is developed. Simulations using the ten sets of identical data in the preamble of IEEE 802.11a for estimation of frequency and time offsets have been performed to verify the effectiveness of the proposed algorithms. |
URI: | http://dx.doi.org/10.1109/TSP.2006.874837 http://hdl.handle.net/11536/12047 |
ISSN: | 1053-587X |
DOI: | 10.1109/TSP.2006.874837 |
期刊: | IEEE TRANSACTIONS ON SIGNAL PROCESSING |
Volume: | 54 |
Issue: | 7 |
起始頁: | 2848 |
結束頁: | 2852 |
Appears in Collections: | Articles |
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