Communications device having controller to correct an initial IQ imbalance and associated methods

摘要

A communications device includes a plurality of wireless transmitters operable at different respective frequencies and each configured to generate respective IQ signals having an initial IQ imbalance. The communications device also includes a frequency tunable auxiliary receiver, and a controller. The controller is configured to selectively couple a given wireless transmitter to the frequency tunable auxiliary receiver and tune the frequency tunable auxiliary receiver to a frequency of the given wireless transceiver, and apply predistortion to the given wireless transmitter based upon the initial IQ imbalance to reduce the initial IQ imbalance.

主权项

1. A communications device comprising:
a plurality of wireless transmitters operable at different respective frequencies and each configured to generate respective IQ signals having an initial IQ imbalance; a frequency tunable auxiliary receiver comprising
a low noise amplifier (LNA), and at least one mixer coupled downstream of said LNA, anda receiver phase locked loop (RXPLL) coupled to said at least one mixer, said RXPLL being tunable to the frequencies of the plurality of wireless transmitters; and a controller configured to
selectively couple a given wireless transmitter from among the plurality of wireless transmitters to said frequency tunable auxiliary receiver and tune said frequency tunable auxiliary receiver to a frequency of the given wireless transmitter from among the plurality of wireless transmitters, andapply predistortion to the given wireless transmitter from among the thereof based upon the initial IQ imbalance generated by the given wireless transmitter from among the plurality of wireless transmitters to reduce the initial IQ imbalance.