Patent ID: 8135351
Filing Date: 2012-03-13
Classification: H04L

Abstract:
1. A method for improving channel estimation in a wireless communication system, comprising: receiving a wireless signal that comprises a plurality of multipath components; estimating a time delay for at least one of the plurality of multipath components; obtaining N channel estimates, wherein N is any positive integer greater than one, wherein each channel estimate of the N channel estimates corresponds to a different multipath component of the plurality of multipath components; and reducing the effects of interference between the plurality of multipath components on the N channel estimates by calculating and applying a fading coefficient vector estimate to the N channel estimates based on a correlation matrix and a covariance matrix; wherein obtaining the N channel estimates comprises correlating each of N descrambled signals with a reference signal to obtain the N channel estimates, the reference signal including a downlink channel, and wherein the reference signal is further used to calculate the correlation matrix and the covariance matrix and reducing the effects of interference employs the correlation matrix and the covariance matrix, and the correlation matrix and covariance matrix employ the reference signal.