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sample rate of the 802.11a system

Question asked by sstarm on Mar 27, 2006
I'm trying to use systemview to simulate the 802.11a system,and I found the pdf of "802.11a System Simulation using SystemView by Elanix,AN140 Nov 11, 2002" ,the system including the 16-QAM,and the OFDM block.
but here comes the problem: the signal resoure is 36MHz,but through the convolutional encoder the rate is 72Mhz, and the OFDM block of 802.11a needs the 20Mhz sample rate,so how to set the system sample rate?