Patent ID: 7336744
Filing Date: 2008-02-26
Classification: H04L

Abstract:
1. A digital baseband (DBB) receiver for receiving and processing a wireless communication signal, the DBB receiver comprising: (a) at least one demodulator which outputs analog real and imaginary signal components on real and imaginary signal paths, respectively, in response to receiving the communication signal; (b) an analog to digital converter (ADC) coupled to the real and imaginary signal paths for receiving the analog real and imaginary signal components and outputting respective digital real and imaginary signal components; and (c) a digital cross-talk compensation module in communication with the ADC, wherein the digital cross-talk compensation module receives the digital real and imaginary signal components, estimates cross-talk interference on the real signal component resulting from energy from the imaginary signal component being induced into the real signal path, estimates cross-talk interference on the imaginary signal component resulting from energy from the real signal component being induced into the imaginary signal path, and outputs digital real and imaginary cross-talk compensated signal components, wherein the digital cross-talk compensation module comprises: (i) a real signal path for receiving the digital real signal component; (ii) an imaginary signal path for receiving the digital imaginary signal component; (iii) a first delay unit, coupled to the real signal path, for receiving the digital real signal component and outputting the digital real signal component after a first predetermined delay period expires; (iv) a first adder, coupled to the real signal path and the first delay unit, for adding a negative value of the digital real signal component to the delayed digital real signal component output by the first delay unit to generate a first resulting signal; (v) a first multiplier, coupled to the first adder, for multiplying the first resulting signal with a first compensation signal having a first predetermined value (K (vi) a second delay unit, coupled to the imaginary signal path, for receiving the digital imaginary signal component and outputting the digital imaginary signal component after a second predetermined delay period expires; and (vii) a second adder, coupled to the second delay unit and the first multiplier, for outputting the digital imaginary cross-talk compensated signal component.