Patent ID: 8503545

Claim:
A receiver comprising: a local oscillator (LO) configured to generate a first LO signal and a second LO signal; a first signal multiplier configured to receive a processed signal and the first LO signal, and output an in-phase branch signal, the processed signal including an information signal; a second signal multiplier configured to receive the processed signal and the second LO signal, and output a quadrature-phase branch signal; and a baseband processing unit configured to: receive a digitized in-phase branch signal associated with the signal output by the first signal multiplier; receive a digitized quadrature-phase branch signal associated with the signal output by the second signal multiplier; calculate a time expectation of the digitized in-phase and quadrature-phase branch signals in a frequency domain to estimate values of an amplitude imbalance factor {tilde over (ρ)} and a phase imbalance factor {tilde over (φ)} over a total of N sub-carriers by performing, for each of the amplitude and phase imbalance factors, at least one look-up-table operation and one or more of: a plurality of summation actions, a plurality of multiplication actions, or a plurality of division actions; wherein N is an integer and greater than one apply an amplitude imbalance parameter and a phase imbalance parameter derived from the amplitude imbalance factor {tilde over (ρ)} and the phase imbalance factor {tilde over (φ)} to the in-phase and quadrature-phase branch signals to recover the information signal from the processed signal; and output the information signal.