WiMAX中的simpling factor有啥用啊
时间：04-11
整理：3721RD
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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！
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！
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.
嗯，好像是这个样子，不过有什么物理意义吗？
采样因子，与带宽相关？
例如，5M带宽 512点FFT，20MHz带宽2048点FFT？
也不是，你看凡是1.25整数倍的都是28/25，这样的话5MHz和10MHz的一样