Uplink carrier aggregation front-end architecture that supports simultaneous mimo

A wireless device comprising:

• a transceiver configured to generate a plurality of transmit signals and process a plurality of received signals;
• a plurality of antennas configured to facilitate transmission of the transmit signals and reception of the received signals;
• and
• a front-end system implemented between the transceiver and the plurality of antennas, and including a first module having a low-band power amplifier with integrated duplexer, a second module having a power amplifier with integrated duplexer and configured to provide uplink carrier-aggregation, and a plurality of third modules each having a power amplifier with integrated duplexer for a mid-low-band or higher frequency band, the front-end system further including a first power management unit implemented to provide supply voltage for each of the first module and the second module, and a second power management unit implemented to provide supply voltage for each of the plurality of third modules.