Patent ID: 8976885
Filing Date: 2015-03-10
Classification: H04B

Abstract:
1. A method of calculating combining weight vectors associated with a received composite information signal comprising at least one data stream transmitted from at least a first antenna and a second antenna, a calculated combining weight vector being used to demodulate the at least one data stream transmitted through a transmission channel, the method comprising: computing a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the first antenna and the second antenna respectively, wherein the common pilots are pilots without being precoded or beam-formed, wherein the first impairment term captures effects of interferences between the common pilots, in addition to effects of interferences caused by each common pilot singly, and wherein the computed impairment covariance matrix further includes a data covariance term capturing effects of the at least one data stream and an interference term caused at least partially by contribution of thermal noise of receiver branches; and computing the combining weight vector using the computed impairment covariance matrix.