Title :
Maximum Likelihood Frequency Offset Estimation & Cramer Rao Bound for Ultra-Wideband (UWB) Multi-Band OFDM Systems
Author :
Yak, Chin Wee ; Lei, Zhongding ; Tjhung, Tjeng Thiang
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore
Abstract :
The maximum likelihood (ML) estimator and the Cramer Rao Bound (CRB) for frequency offset estimation are derived and compared against each other in a multi-band orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) system. A total of 100 UWB channel realizations, as proposed by IEEE 802.15 channel modeling sub-committee, for each channel model (CM) 1: line-of-sight for 0-4 m and CM2: non-line-of-sight for 0-4 m are simulated to demonstrate the convergence of the ML estimator variance with the CRB for high signal-to-noise ratio (SNR)
Keywords :
OFDM modulation; fading channels; frequency estimation; maximum likelihood estimation; personal area networks; ultra wideband communication; CRB; Cramer Rao Bound; IEEE 802.15 channel modeling sub-committee; SNR; UWB channel; fading channels; maximum likelihood frequency offset estimation; multi-band orthogonal frequency division multiplexing; signal-to-noise ratio; ultra-wideband multi-band OFDM systems; Computer vision; Convergence; Cramer-Rao bounds; Delay estimation; Fading; Frequency estimation; Intersymbol interference; Maximum likelihood estimation; OFDM modulation; Ultra wideband technology; Cramer Rao bound; MB-OFDM; UWB; frequency offset estimation; maximum likelihood;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2006.1683282
