Title :
Cramer-Rao bounds for data-aided sampling clock offset and channel estimation
Author :
Gault, Sophie ; Hachem, Walid ; Ciblat, Philippe
Author_Institution :
Service Radioelectricite, Supelec, France
Abstract :
We derive the Cramer-Rao bound (CRB) on the joint estimates of the sampling clock offset and the channel impulse response when a training sequence is available. Simple closed form expressions are obtained for the CRB in the case where the observation window is large, and furthermore in the case where the channel degree is large. Our derivations are suited for single-carrier as well as for multi-carrier orthogonal frequency division multiplexing (OFDM) schemes. Data-aided maximum-likelihood (ML) estimates are also carried out.
Keywords :
OFDM modulation; channel estimation; maximum likelihood estimation; signal sampling; synchronisation; transient response; CRB; Cramer-Rao bounds; channel estimation; channel impulse response; data-aided sampling clock offset estimation; large channel degree; maximum-likelihood estimates; multicarrier OFDM; observation window size; orthogonal frequency division multiplexing; single-carrier OFDM; synchronized receiver clock; training sequence; Channel estimation; Clocks; Delay estimation; Digital communication; Frequency estimation; Frequency synchronization; Low pass filters; Maximum likelihood estimation; OFDM; Sampling methods;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Print_ISBN :
0-7803-8484-9
DOI :
10.1109/ICASSP.2004.1327005
