[問題] 請問 SUI channel model
因為最近想做OFDM的simulation在SUI channel model的環境下,
但是看不大懂SUI的一些參數而且有些觀念還不大清楚
使我在這個地方卡很久 所以想請教使用過的前輩們
以SUI-4為例好了:
| Tap1 | Tap2 | Tap3 | Units
-------------------------------------------------------------
Delay | 0 | 1.5 | 4 | 10^-6 sec
-------------------------------------------------------------
Power(omni ant.) | 0 | -4 | -8 | dB
90% K-fact. (omni ant.)| 0 | 0 | 0 |
75% K-fact. (omni ant.)| 1 | 0 | 0 |
----------------------------------------------------------
Power(30 ant.) | 0 | -10 | -20 | dB
90% K-fact. (omni ant.)| 1 | 0 | 0 |
75% K-fact. (omni ant.)| 5 | 0 | 0 |
-----------------------------------------------------------
Doppler | 0.2 | 0.15 | 0.25 | Hz
-----------------------------------------------------------
Anttena Correlation : P_ENV=0.3
Gain Reduction Factor: GRF=4dB
Normalization Factor : F_omni=-1.9218 dB
F_30 =-0.4532 dB
Terrain Type:B
Omni attenna: tau_RMS=0.264*10^-6 sec
overall K: K=0.1(90%);K=0.3(75%);K=1.0(50%);
30 attenna: tau_RMS=1.276*10^-6 sec
overall K: K=0.4(90%);K=1.3(75%);K=4.2(50%);
======================問題開始============================
假如要傳送一連串的sequence到mutipath的channl裡(其實也只是在baseband做模擬)
表中的Delay的時間可代表delay的sample數(若data rate已定好)
表中的Power(omni ant.) , 我猜是每個path delay所夾帶的power
表中的Doppler , 我知道是用在jakes model中帶入的doppler frequency
但是其他的參數搞不大清楚是在幹嘛的
ex:90% K-fact,75% K-fact ,還有表下方的參數
如果針對我這樣的模擬,是不是只需要我所知道的參數下去做就好了?
還有每個SUI都是三個tap,是不是代表只有三條主要的delay path嗎?
麻煩各位大大的指教了~~~~~~~~~感激不盡~!!!!
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