Title :
Multi-slot estimation of space-time channels
Author :
Simeone, O. ; Spagnolini, U.
Author_Institution :
Dipt. di Elettronica e Inf., Politecnico di Milano, Italy
Abstract :
In mobile communications, the multipath space-time channel has some fast-varying (faded amplitudes of the paths) and slowly-varying (delays and directions of arrival) features. We propose to estimate the channel from limited-length training sequences by exploiting these different varying rates without explicitly computing delays and directions of arrival. Therefore, the multi-slot channel estimate is composed of two terms: the slowly-varying space-time bases estimated from L consecutive slots and the fast-varying amplitudes estimated on a slot-by-slot basis. Performance analysis and simulations confirm the expected benefits of the multi-slot approach and demonstrate that for large L the mean square error (MSE) on the channel estimate depends only on the number of fast-varying parameters.
Keywords :
cellular radio; delays; fading channels; mean square error methods; multipath channels; parameter estimation; time-varying channels; 3rd generation system; GSM; MSE; WCDMA; delays; directions of arrival; faded amplitudes; fast-varying amplitudes; fast-varying channel; limited-length training sequences; mean square error; mobile communications; multi-slot channel estimation; multipath channel model; multipath space-time channel; performance analysis; slowly-varying channel; slowly-varying space-time bases; space-time channels; Amplitude estimation; Analytical models; Channel estimation; Delay estimation; Least squares approximation; Linear antenna arrays; Mobile communication; Performance analysis; Propagation delay; Slot antennas;
Conference_Titel :
Communications, 2002. ICC 2002. IEEE International Conference on
Print_ISBN :
0-7803-7400-2
DOI :
10.1109/ICC.2002.996966
