Patent ID: 9020019
Filing Date: 2015-04-28
Classification: H04B,H04L

Abstract:
1. A computer-implemented method for computing I/Q impairments at a complex output of an electrical system based on I/Q impairments at a complex input of the electrical system, the method comprising: computing a first spectrum based on: computing a second spectrum based on: computing a sum of the first spectrum and the second spectrum, and a difference of the first spectrum and the second spectrum; computing an output gain imbalance spectrum and an output phase skew spectrum based on real and imaginary parts of the sum, and real and imaginary parts of the difference, wherein the output gain imbalance spectrum and the output phase skew spectrum respectively characterize gain imbalance and phase skew at the complex output; and storing the output gain imbalance spectrum and the output phase skew spectrum in a memory.