Patent ID: 8565706
Filing Date: 2013-10-22
Classification: H04B

Abstract:
1. A method of allocating a number of despreading fingers in a RAKE receiver, which is adapted to receive input paths from at least first and second antennas, to a number of delay positions of a signal which is transmitted over a channel, comprising: estimating an antenna correlation between the at least first and second antennas, wherein the antenna correlation is a measure of a statistical relationship between signals respectively received at the at least first and second antennas; if the antenna correlation is below a threshold, choosing a first strategy for allocating the fingers to the delay positions; and otherwise, choosing a second strategy for allocating the fingers to the delay positions; wherein the threshold is selected based on at least one of a number of available fingers in the RAKE receiver, a dispersion of the channel, and a range of directions of arrival of the input paths; and the second strategy comprises identifying pairs of corresponding delay positions among the delay positions from the at least first and second antennas, eliminating the delay position with the smallest signal strength in each such pair, and allocating the fingers to the delay positions having the largest signal strengths among the remaining delay positions from the at least first and second antennas.