DocumentCode :
983597
Title :
Maximum-likelihood estimation of frequency and time offsets in OFDM systems with multiple sets of identical data
Author :
Cheng, Mu-Huo ; Chou, Chi-Chan
Author_Institution :
Dept. of Electr. & Control Eng., Nat. Chiao Tung Univ., Hsinchu
Volume :
54
Issue :
7
fYear :
2006
fDate :
7/1/2006 12:00:00 AM
Firstpage :
2848
Lastpage :
2852
Abstract :
This paper generalizes the existing algorithm for the maximum-likelihood (ML) 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 Crameacuter-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
Keywords :
OFDM modulation; computational complexity; frequency estimation; maximum likelihood estimation; wireless LAN; Cramer-Rao bound; IEEE 802.11a; OFDM systems; frequency estimation; identical data sets; matrix inversion lemma; maximum-likelihood estimation; orthogonal frequency-division multiplexing; realization complexity reduction; time offset estimation; AWGN; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Maximum likelihood estimation; OFDM; Sampling methods; Signal processing algorithms; TV broadcasting; Wireless communication; IEEE 802.11a; maximum-likelihood (ML) estimation; orthogonal frequency-division multiplexing (OFDM);
fLanguage :
English
Journal_Title :
Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
1053-587X
Type :
jour
DOI :
10.1109/TSP.2006.874837
Filename :
1643928
Link To Document :
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