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Reply To: Uplink/Downlink Frequencies in GSM/CDMA

#36990
Abhisheik
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Can someone tell me wether gsm 900 or gsm 180 is used in india?….and why is it that digital modulation is not enough for radio transmission in gsm?….also ..can we send a dgital signal lieka sqarewave pulse via radio transmission without loss?….some please tell me ….really need to know …