A parametric spatio-temporal channel estimation technique for FDD UMTS uplink

Many multi-user receivers have been developed to mitigate the effects of both multipath and interference in CDMA radiocommunication networks. However despite of these works, very few papers have been devoted to the implementation of these receivers and, more precisely, to the channel estimation problem in both multi-user and FDD UMTS context. Assuming specular propagation channels and a multi-sensor receiver; the purpose of this paper is to present a parametric technique for the joint estimation of the delays and angles of arrival of the propagation channels between each user and the array of sensor for the FDD UMTS uplink. The quality of the latter are then evaluated through mean square error (MSE) computations and bit error rates (BER) after demodulation at the output of two receivers (2D-RAKE and decorrelator receiver) adapted to the FDD UMTS uplink