Dsda and mimo antenna system

A method of antenna-use management in a mobile communication device having first and second antennas, a primary subscriber identification module (“SIM”) linked to the first antenna, a diplex module, a secondary SIM transceiver path linked to the second antenna via the diplex module, a multiple-input, multiple-output (“MIMO”) transceiver path also linked to the second antenna via the diplex module, and a power splitter disposed in the secondary SIM transceiver path, the method comprising:

• detecting a current signal-to-noise ratio (“SNR”) value associated with the MIMO transceiver path;
• generating a power split value based on the current SNR value;
• and
• applying the generated power split value at the power splitter to apportion signal power between the MIMO transceiver path and the secondary SIM transceiver path.

A mobile communication device comprising:

• an antenna;
• a first transceiver path linked to the antenna;
• a second transceiver path linked to the antenna;
• and
• a power splitter configured to adaptively set a power split between the first and second transceiver paths based on a current signal-to-noise value associated with one of the first and second transceiver paths.