Patent ID: 8908817
Filing Date: 2014-12-09
Classification: H04B

Abstract:
1. A method, in a diversity receiver, for calculating an estimate of a differential phase between a first local oscillator of a first antenna and a second local oscillator of a second antenna, in a presence of at least one interference signal, the method comprising: receiving a primary communication signal, the primary communication signal being down-converted by the first local oscillator, and filtered by a first adaptive filter, resulting in a filtered primary communication signal; receiving a primary reference signal, the primary reference signal being down-converted by the second local oscillator and filtered by a second adaptive filter, resulting in a filtered primary reference signal; receiving an additional reference signal, the additional reference signal being down-converted by an additional local oscillator, and filtered by an additional adaptive filter, resulting in a filtered additional reference signal; processing the filtered primary communication signal, the filtered primary reference signal, and the filtered additional reference signal, resulting in a first intermediate signal and a second intermediate signal such that a summation of the first intermediate signal and the second intermediate signal will not substantially comprise the at least one interference signal when the first local oscillator and the second local oscillator are phase aligned; estimating the differential phase between the first local oscillator and the second local oscillator by calculating the differential phase such that a summation of the first intermediate signal and the second intermediate signal, with a relative phase shift of the differential phase, is approximately equal to a predetermined symbol.