Q.6 VAMOS DTX scenario in downlink

3GPP45.005GSM/EDGE Radio transmission and receptionTS

The purpose of this test case is to verify the VAMOS II and VAMOS III mobile receiver performance when the paired VAMOS subchannel user goes into and comes out of DTX.

The modulation of the downlink VAMOS signal shall be switched between AQPSK (with –10 dB SCPIR) and GMSK according to the following:

The power of the GMSK burst in the downlink in this test case shall be 10.5 dB lower than the power of the AQPSK burst. The average input signal level over all the bursts at the reference performance for the VAMOS II MS shall be as per the table 1u and for the VAMOS III MS shall be as per the table 1y. The reference performance according to section 6.2.1a shall be applicable for this test case.