Is low-IF good for 802.11 a/b/g?

I want hear comments about Low-IF to be used in RFIC design of 802.11 a/b/g?

Low-IF must use polyphase filters, how we make it to meet the error requirements of I/Q (amplititude and phase)?

How many percent of power consumption more than Zero-IF architecture?

It is in practice difficult to benchmark Low-IF and Zero-IF in term of power consumption. It depends on how well you partition your receiver and how good your circuits are designed.

Don :)