Title :
Estimation of multiple delays in a slowly fading channel
Author_Institution :
Inst. of Commun. & Navigation, German Aerosp. Centre, Wessling, Germany
Abstract :
The time-of-arrival estimation of several short delayed replicas of a known signal in a single antenna receiver is an ill-conditioned problem, which improves if the amplitudes are not completely static. We present a signal model that includes slow amplitude variations using a Karhunen-Loeve expansion, and the corresponding maximum likelihood estimator. The results show that a clear performance improvement in the delay estimation can be achieved by including these variations in the model.
Keywords :
delay estimation; fading channels; maximum likelihood estimation; radio receivers; signal processing; Karhunen-Loeve expansion; amplitude variations; maximum likelihood estimation; multiple delay estimation; signal model; single antenna receiver; slowly fading channel; time-of-arrival estimation; Artificial satellites; Content addressable storage; Delay estimation; Fading; Maximum likelihood estimation; Receiving antennas; Satellite navigation systems; Signal processing; Time of arrival estimation; Wireless communication;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
Print_ISBN :
0-7803-7663-3
DOI :
10.1109/ICASSP.2003.1202716
