GSM Cell Phone Fundamentals
As proven in the determine, every mobile phone will have RF part which consists of RF frequency up converter and rf frequency down converter. For GSM system, up converter converts modulated baseband sign(I and Q) both at zero IF(Intermediate frequency) or some IF to RF frequency(890-915 MHz). RF down converter converts RF signal(935 to 960 … Read moreGSM Cell Phone Fundamentals