Patent ID: 8488442

Claim:
A receiver comprising: a radio frequency receive unit configured to downconvert an analog radio frequency signal into an analog baseband signal; an in-phase and quadrature-phase detector configured to recover an analog in-phase signal and an analog quadrature signal from the analog baseband signal; an analog-to-digital converter configured to convert the analog in-phase signal into a corresponding digital in-phase signal, and convert the analog quadrature signal into a corresponding digital quadrature signal; an in-phase and quadrature-phase compensation unit configured to compensate the digital in-phase signal and the digital quadrature signal for any imbalance between the digital in-phase signal and the digital quadrature signal; a fast Fourier transform module configured to convert the compensated digital in-phase signal and the compensated digital quadrature signal into a frequency domain digital Orthogonal Frequency Division Multiplexing (OFDM) symbol; a channel estimator configured to generate a plurality of channel estimates, wherein each channel estimate corresponds to an estimate of the channel for a corresponding sub-carrier of the frequency domain digital Orthogonal Frequency Division Multiplexing (OFDM) symbol; and a phase error and in-phase and quadrature-phase imbalance module configured to generate (i) a most likely estimate of the imbalance between the digital in-phase signal and the digital quadrature signal and (ii) a most likely estimate of a common phase error in the plurality of channel estimates, wherein (i) the most likely estimate of the imbalance between the digital in-phase signal and the digital quadrature signal is used to compensate the digital in-phase signal and the digital quadrature signal, and (ii) the most likely estimate of the common phase error is used to compensate the plurality of channel estimates.