Patent ID: 9118512
Filing Date: 2015-08-25
Classification: H04L

Abstract:
1. A method of compensating for impairments of a wireless device, comprising: determining a set of equalizer taps for an analog pipeline of the wireless device; modifying the set of equalizer taps according to an estimated imbalance of the analog pipeline of the wireless device to determine a first set of complex filter taps and a second set of complex filter taps; processing a signal associated with the analog pipeline with a complex filter at the wireless device according to the first set of complex filter taps and the second set of complex filter taps, wherein the complex filter comprises a multi-stage in-phase delay line and a multi-stage quadrature delay line, the processing comprising a combined imbalance compensation and equalization of the signal, wherein the complex filter comprises a first complex half-filter associated with the first set of complex filter taps and a second complex half-filter associated with the second set of complex filter taps, and wherein each complex half-filter processes both an in-phase component of the signal and a quadrature component of the signal; summing a real output of each stage of the in-phase delay line with an imaginary output of each stage of the quadrature delay line to obtain an in-phase output of the complex filter; and summing an imaginary output of each stage of the in-phase delay line with a real output of each stage of the quadrature delay line to obtain a quadrature output of the complex filter.