
Changes!! Air Interface
• GMSK modulation is maintained for certain data rates
• 8-PSK modulation with 3 /8 rotation per symbol is used for higher
data rates
• TS format is maintained for backward compatibility and easier design
• Symbol rate is the same as in GSM (270.833 ksps)
• For 8-PSK modulation, the raw bit rate is tripled
(3x270.833 = 812.499 kbps)
S
Physical Layer: GPRS / EDGE Comparsion
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