Title :
Design and performance of a variable-rate QAM modem for digital cable television
Author :
Karam, G. ; Maalej, K. ; Paxal, V. ; Sari, H.
Author_Institution :
SAT (SAGEM GROUP), Div. of Telecom., Paris, France
Abstract :
The paper presents the design and performance of a quadrature amplitude modulation (QAM) modem for digital cable TV broadcasting. The modem fully complies with the European DVB standard and includes a number of additional features. The most distinctive feature is that this fully-digital modem offers a variable symbol rate and handles all modulation schemes from 16-QAM up to 256-QAM. It also includes a powerful blind equalizer and a carrier synchronization technique with extended frequency acquisition capability that allows one to use low-cost tuners and analog front-ends. The authors present the architecture of the modem and discuss its performance
Keywords :
CMOS digital integrated circuits; VLSI; cable television; digital signal processing chips; digital television; equalisers; modems; quadrature amplitude modulation; synchronisation; 16-QAM; 256-QAM; European DVB standard; analog front-ends; architecture; blind equalizer; carrier synchronization technique; design; digital cable television; extended frequency acquisition capability; fully-digital modem; low-cost tuners; modulation schemes; performance; quadrature amplitude modulation; variable symbol rate; variable-rate QAM modem;
Conference_Titel :
Broadcasting Convention, 1995. IBC 95., International
Conference_Location :
Amsterdam
Print_ISBN :
0-85296-644-X
DOI :
10.1049/cp:19950948
