Patent ID: 6956841
Filing Date: 2005-10-18
Classification: H04B

Abstract:
1. A receiver for receiving a signal of a desired user, which signal may arrive at the receiver in different components along several different paths at several different delays, the receiver comprising: an antenna array composed of more than one element for receiving the signal, wherein the received signal comprises I- and Q-branches, one or more rake branches for demodulating the received signal, at least one search branch adapted to calculate a two-dimensional impulse response of the received signal by searching for incoming directions and delays of components of the received signal, and to transmit information indicating a most favorable signal component demodulated by the one or more rake branches, and in which at least one rake branch includes calculation means whose inputs include the outputs of the plurality of correlators, the calculation means being adapted to calculate and transmit to the control means, on the basis of the outputs of the plurality of correlators, information on how the code generator and the plurality of beam formers are to be controlled to ensure that the first beam former and the first correlator receive the most favorable signal component via the direction and delay calculated for this purpose, wherein, the plurality of correlators included in the at least one rake branch are adapted to calculate, for only one branch of the received signal, a correlation from a calculated incoming direction and from left and right sides of that incoming direction of that at least one rake branch, and wherein the calculation means are adapted to calculate a control signal for controlling the beam formers such that, if the correlation result calculated, for the only one branch of the received signal, from the left or right side of the incoming direction is higher than the correlation result obtained from the calculated incoming direction for the only one branch of the received signal, the first beam former is controlled to receive the signal from the left or right side of the incoming direction having the higher correlation result.