Channel filter in new OFDM PHY

Hi all,
I have a question about the channel filter usage in OFDM PHY.
In the benchmark, there is a channel filter used before ofdm syn.
In the new OFDM PHY, especially in the GRC example, there is not
a block. So, should I use a channel filter when i want to using the New
OFDM PHY implementation?

*Yaxiong Xie / *л

School of Computer Engineering

Nanyang Technological University, Singapore