MULTIPLE-INPUT MULTIPLE-OUTPUT RADIO TRANSCEIVER

摘要

A multiple-input multiple-output, MIMO, radio transceiver comprising a first receiver circuit including a first downconverter, the first receiver circuit configured to receive a signal having a first center frequency from a first antenna, and to downconvert the signal from the first antenna to produce a first receive baseband signal; a second receiver circuit including a second downconverter, the second receiver circuit configured to receive a signal having the first center frequency from a second antenna, the second antenna spatially separate from the first antenna, the second receiver circuit configured to downconvert the signal from the second antenna to produce a second receive baseband signal substantially simultaneously as the first receiver circuit downconverts the signal from the first antenna; a first transmitter circuit including a first upconverter, the first transmitter circuit configured to receive a first transmit baseband signal, and to upconvert the first transmit baseband signal to produce a first radio frequency signal with a second center frequency for transmission over the first antenna; and a second transmitter circuit including a second upconverter, the second transmitter circuit configured to receive a second transmit baseband signal, and to upconvert the second transmit baseband signal to produce a second radio frequency signal with the second center frequency for transmission over the second antenna substantially simultaneously as the transmission of the first radio frequency signal over the first antenna, wherein local oscillator signal center frequencies used by the downconverters and the upconverters are controlled by a radio frequency center frequency control signal.