GSM原理介绍ppt34

RF Aspects
TDMA
0.3GMSK Modulation
Burst Power Transmission
Neighbour Cells Measurement
Hopping
Uplink / Downlink DTx
BER & Receiver Testing

GSM Frequency Range
890 - 915 MHz Uplink / MS Transmit
935 - 960 MHz Downlink / BS Transmit
Duplex Offset 45 MHz
Channel Spacing 200kHz
Channel numbering 1 - 124
Transmission Speed 270 Kbits
DCS1800 Frequency Range
1710 - 1785 MHz Uplink / MS Transmit
1805 - 1880 MHz Downlink / BS Transmit
Duplex Offset 95 MHz
Channel Spacing 200kHz
Channel numbering 512 - 885
Transmission Speed 270 Kbits

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