How many Mhz guardband's between Gsm 850-900?

**daucuhanh** · 2011-05-30, 04:40 PM

Hi all.
as we known, GSM 850 :
Uplink 824 – 849 Mhz.
Downlink 869 – 894 Mhz
and GSM 900: 890 – 915 Mhz (Up), 935 – 960 MHz (down).
So GSM 850 downlink and GSM 900 Uplink will be duplicate 4 Mhz==> Could u show me how many Mhz Guardband is the best if we deploy both GSM 850 and GSM 900 in the same area?
Some document i have read show at least 3Mhz...

Thanks so much.