8 Modulations

3GPP45.001General descriptionGSM/EDGE Physical layer on the radio pathRelease 17TS

The modulation scheme may be one of gaussian MSK (GMSK) with BT = 0,3, AQPSK, QPSK, 8-PSK, 16QAM or 32QAM depending on the type of channel. As already mentioned the modulation rate is either the normal symbol rate, 1 625/6 ksymbol/s ( 270,83 ksymbol/s) (see 3GPP TS 45.004) or the higher symbol rate, 325 ksymbol/s (see 3GPP TS 45.004). These schemes are specified in detail in 3GPP TS 45.004.