Patent ID: 8594579

Claim:
A mobile wireless communications device comprising: a portable housing; a transceiver comprising a transmitter and a receiver carried by said portable housing, said transmitter configured to operate in a dual-mixer mode and to upconvert a transmit baseband modulated signal and generate an RF modulated signal having a transmit impairment; an auxiliary receiver carried by said portable housing and coupled to said transmitter and configured to operate in a single-mixer mode and to downconvert the RF modulated signal and generate a receive baseband modulated signal having a receive impairment therein spectrally separated from the transmit impairment; and a controller carried by said portable housing and coupled to said transmitter and said auxiliary receiver, said controller configured to estimate the transmit impairment while ignoring the receive impairment based on comparing the transmit baseband modulated signal with the receive baseband modulated signal, and generate a transmit impairment compensation signal based upon the estimated transmit impairment.