Oct 14, 2007 #1 G Gemini1706 Member level 5 Joined Jul 3, 2002 Messages 81 Helped 3 Reputation 6 Reaction score 2 Trophy points 1,288 Activity points 1,120 wcdma synchronization How the receiver locks first to the signal? does it do symbol timing lock first, then frequency lock then phase lock? SAy for GSM? How about WCDMA? How about FM? If the receiver can lock to the freq using AFC, so what is the point of TCXO? why not just use a crystal? Thanks in advance.
wcdma synchronization How the receiver locks first to the signal? does it do symbol timing lock first, then frequency lock then phase lock? SAy for GSM? How about WCDMA? How about FM? If the receiver can lock to the freq using AFC, so what is the point of TCXO? why not just use a crystal? Thanks in advance.
Oct 16, 2007 #2 B brmadhukar Advanced Member level 3 Joined Jun 21, 2002 Messages 839 Helped 42 Reputation 84 Reaction score 11 Trophy points 1,298 Location India Activity points 6,783 gsm detector coherent The receiver always locks by looking at a pattern (detection) and measuring the difference with the pattern (synch and tracking) For the FM the pattern is the frequency... The receivers cannot track very wide offsets from centrte frequency without performance degradation, so use of TCXOs in some cases.
gsm detector coherent The receiver always locks by looking at a pattern (detection) and measuring the difference with the pattern (synch and tracking) For the FM the pattern is the frequency... The receivers cannot track very wide offsets from centrte frequency without performance degradation, so use of TCXOs in some cases.