亚星游戏官网-yaxin222

门户 | 手机客户端 | 论坛 | 人才 | 百科 | 搜索 | 技术问答 | English
已解决问题
[求助]WiMAX中的simpling factor有啥用啊  (进入论坛模式)
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!
显示所有答案回应     最佳答案
kin5000 的答案    ( 采纳时间:2012-4-18 16:03 )
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.
回应该答案 (1)  |  回答时间:2012-4-12 15:06
其他答案 ( 1 条 )
采样因子,与带宽相关?
例如,5M带宽 512点FFT,20MHz带宽2048点FFT?
 |  回应该答案 (1)  |  回答者:ziyubiti   |  2012-4-11 23:10
XML 地图 | Sitemap 地图