How to reduce signal PAR from I & Q ?

Hello users,

I have an ofdm based modulation and would like to reduce its peak to average without generating spectral regrowth.

Does clipping work at I&Qs ?

People came up with a bunch of PAR reduction techniques for OFDM so I guess this is more complicated than just clipping the base band data.

thanks

Clipping have limits because at certain point would increase BER.

http://scientific-journals.org/journ.../vol1no8_4.pdf