GSM Technical Summary

GSM

Global System Mobile Communications

TDMA/FDM

FDD

124

(8 users/channel)

200 kHz

Mobile Frequency

Range (MHz)

Multiple Access Method

Number of Channels

Channel Spacing

Duplex Method

8 per frame

Number of time slots

45 MHz

TX/RX Freq. spacing

TX/RX Time Slot Spacing

3 time slots

576.9 usec

Length of Time Slot

RX:935-960

TX:890-915

GMSK(BT=0.3

Gaussian Filter)

3.692 usec

Length of Bit

270.833 kbps

Bit Rate

13 kbps(RPE-LTP)

Modulation

4.615 ms

Length of Frame

Speech Coding

前一張投影片

下一張投影片

回到第一張投影片

檢視圖形版本