Patent ID: 8446937

Claim:
A computer-implemented method for estimating I/Q impairment information associated with a sampled complex signal produced by a receiver, the method comprising: (a) directing a device to stimulate the receiver with a stimulus signal having an isolated tone at displacement frequency f and a void interval at displacement frequency −f, wherein displacement frequencies f and −f are displacements with respect to a local oscillator frequency of the receiver, wherein the sampled complex signal is a baseband signal produced by the receiver; (b) computing a Discrete-Time Fourier transform value C I at frequency f of an I component of the sampled complex signal; (c) computing a Discrete-Time Fourier transform value C Q at frequency f of a Q component of the sampled complex signal; (d) computing a gain imbalance g of the sampled complex signal at frequency f based on magnitudes of the values C I and C Q , wherein the gain imbalance g includes a gain imbalance of the receiver.