power amplifier for mqam, mpsk, and mfsk

Hii

I am designing low power wireless sensor node.

i am using different modulation scheme. MPSK, MQAM and MFSK

so please tell me power perticulear power amplifier for each. its class and efficiency.

i read in some paper that for mqam classA, and mpsk and mfsk higher class amplifier is used. but this data is old(1998)
I need todays practical data...

can anybudy help me..?

specifications are

2.4GHz operating range, low power application 1mW to 100mW..

How to choose power amplifier for modulation type and waveform?.
or how power amplifier efficiency is depended to it?

pls help me...
thank you