Nortel Networks DCT1900 manual Characteristics

Technical Product Manual - DCT1900

System Description, Other System Aspects

5.3.3 Characteristics

Frequency band	:	1920-1930 MHz
Number of carriers	:	8 adjacent
Carrier spacing	: 1.25 MHz in 1920-1930 MHz band;
Transmission	: MC/TDMA/TDD (Multiple Carrier/ Time–Division Multiple Access/
		Time–Division Duplexing)
TDMA frame	: 10 ms
TDMA slot	:	0.417 ms
No. of slots per frame	: 24 (12 full duplex channels)
Total number of channels	: 96 (88 available for speech)
Bit rate	:	1152 kbit/s
Speech coding	: 32 kbit/s ADPCM (Adaptive Differential Pulse Code Modulation)
Modulation	: π /4 DQPSK (Differential Quadrature Phase Shift Keying) with RRC
		baseband filtering with 50% bandwidth expansion (∝ =0.5)

5-2	System-DCT1900/R8/mw
	© 2000-2005