Patent ID: 8179998
Filing Date: 2012-05-15
Classification: H04L

Abstract:
1. A communication signal receiver for estimating an imaginary-part component of a complex data signal, comprising: a feed-forward filter, for receiving a real-part component of the complex data signal and for generating an estimated imaginary-part component signal according to the real-part component of the complex data signal by using tap coefficients of the feed-forward filter; a first coefficient adjusting circuit, coupled to the feed-forward filter, for adjusting the tap coefficients of the feed-forward filter according to a control information, wherein the control information at least comprises a phase error information, and the phase error information changes as a phase of the complex data signal adjusted or not adjusted by the first coefficient adjusting circuit changes; a delay unit, for delaying the real-part component of the complex data signal to generate a delayed real-part component signal; and a phase error corrector, coupled to the delay unit and the feed-forward filter, for adjusting a complex phase corresponding to the delayed real-part component signal and the estimated imaginary-part component signal according to the phase error information.