Patent ID: 9088472
Filing Date: 2015-07-21
Classification: H03F,H04L

Abstract:
1. A system for compensating for in-phase and quadrature-phase (I/Q) impairments of I/Q input signals, comprising: first, second, third, and fourth programmable registers for storing respective first, second, third, and fourth values; a first finite impulse response (FIR) filter module having a first set of filter taps connected to the first and second programmable registers for receiving the first and second values, respectively, for receiving the I input signal, selecting a first subset of the first set of filter taps for a first I signal path based on the first value to generate a first intermediate output signal, selecting a second subset of the first set of filter taps for a first Q signal path based on the second value to generate a second intermediate output signal; a second FIR filter module having a second set of filter taps, connected to the third and fourth programmable registers for receiving the third and fourth values, respectively, for receiving the Q input signal, selecting a first subset of the second set of filter taps for a second I signal path based on the third value to generate a third intermediate output signal, selecting a second subset of the second set of filter taps for a second Q signal path based on the fourth value to generate a fourth intermediate output signal; a first adder connected to the first and second FIR filter modules for receiving the first and third intermediate output signals, respectively, and generating a compensated I output signal; and a second adder connected to the first and second FIR filter modules for receiving the second and fourth intermediate output signals, respectively, and generating a compensated Q output signal.