Multiple subscriber identity module (msim) with carrier aggregation (ca) in a downlink pipe limited transceiver

A system for wireless communications, comprising:

• a first frequency synthesizer configured to generate a first local oscillator (LO) signal;
• a second frequency synthesizer configured to generate a second LO signal;
• a first receive circuit configured to:
• receive a first carrier and a second carrier for a first subscriber;
• and
• mix the first carrier and the second carrier with the first LO signal or the second LO signal to generate a first downconverted signal and a second downconverted signal;
• a second receive circuit configured to:
• receive a third carrier for a second subscriber;
• and
• mix the third carrier with the first LO signal or the second LO signal to generate a third downconverted signal;
• a first multiplexer configured to selectively couple the first LO signal or the second LO signal to the first receive circuit;
• and
• a second multiplexer configured to selectively couple the first LO signal or the second LO signal to the second receive circuit.