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[求助]WiMAX中的simpling factor有啥用啊
提问者：xzb20062007   |  提问时间：2012-4-11 15:04
The sampling factor n determines the subcarrier spacing (in conjunction with the bandwidth and used data subcarriers), and the useful symbol time. This value is set to 28/25 for channel bandwidths that are a multiple of any of 1.25, 1.5, 2 or 2.75 MHz (which is applicable in our case). 求高人解答啊！
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kin5000 的答案
In OFDM systems, RF BW usually is smaller than FFT BW (Nfft * subcarrier spacing). E.g., 802.11a, RF BW=17.6MHz (-3dBc) while FFT BW is 20 MHz.

My understanding is the sampling factor in WiMax FFT BW to RF BW ratio. In the case of 802.11a, the sampling factor is 20/17.6 = 1.136. I hope my understanding is correct.
回答时间：2012-4-12 15:06
此答案得到1次回应
嗯，好像是这个样子，不过有什么物理意义吗？
60.247.46.*  |  回应时间：2012-4-18 15:58
 
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