If a multiple mic system have to be build a TDMA access sheme should be used. Depending on the level of design you could built up yout own radio and baseband processing.
If you have to reuse some components DECT would be a candidate. It is TDMA with 64kBit/s at one of the 12/12 up/downlink channels. You can combine channels to get n*64kBits/s. DECT was also applied to 2.4GHz ISM by using half of the RF data rate and using half of the time slots. So the FCC emision req. was met and the radio/baseband was preserved.
Your idea sounds interesting.
Where can I learn more about DECT ?
If your idea works, it would be possible to have a 16 bit 44 Ks/s
wireless mic. (add diversity to minimize multipath conditions).
I worry about real-time performance.
Will there be a delay due to processing ?
Thanks