Title :
A B-ISDN-compatible modem/codec
Author_Institution :
Comsat Lab., Clarksburg, MD, USA
Abstract :
Coded modulation techniques for developing a B-ISDN (broadband integrated services digital network)-compatible modem/codec are investigated. The selected baseband processor system must support transmission of 155.52 Mb/s of data over an Intelsat 72-MHz transponder. Fundamental system parameters, including channel symbol rate, code rate, and the modulation scheme, are determined. From several candidate codes, a coded octal PSK (phase-shift keying) modulation is selected, and its bit-error-rate performance is analyzed by computer simulation. The hardware implementation complexity of the decoder for the selected code is also examined
Keywords :
codecs; error statistics; modems; phase shift keying; satellite relay systems; transponders; 155.52 Mbit/s; 72 MHz; B-ISDN-compatible modem/codec; COPSK; Intelsat transponder; VHF; bit-error-rate performance; channel symbol rate; code rate; coded octal PSK; computer simulation; design; hardware implementation complexity; modulation scheme; performance; B-ISDN; Baseband; Codecs; Digital modulation; Intserv networks; Modems; Modulation coding; Phase modulation; Phase shift keying; Transponders;
Conference_Titel :
Global Telecommunications Conference, 1990, and Exhibition. 'Communications: Connecting the Future', GLOBECOM '90., IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-87942-632-2
DOI :
10.1109/GLOCOM.1990.116830
