Title :
A high capacity fully digitalized modulator for digital radios
Author :
Shirato, Tadashi ; Okada, Takashi
Author_Institution :
NTT Radio Commun. Syst. Lab., Kanagawa, Japan
Abstract :
A high capacity fully digitized modulator using parallel phase process techniques is developed for digital radio systems. Through the use of 1.2-μm BiCMOS technology, a modulator-LSI (MOD LSI) which guarantees 112-MHz operation is fabricated. Experimental results obtained for a 16 quadrature amplitude modulation (QAM) modem with the MOD LSI show that this modem can be applied directly to a sub-STM-1(51.84 Mbps) of synchronous digital hierarchy (SDH) system, to increase its cost-effectiveness, reliability and performance
Keywords :
BiCMOS integrated circuits; amplitude modulation; digital integrated circuits; digital radio systems; large scale integration; modems; modulators; 1.2 micron; 112 MHz; 16 quadrature amplitude modulation; 16QAM; 51.84 Mbit/s; BiCMOS technology; SDH; VHF; digital radio systems; high capacity digital modulator; modem; modulator-LSI; parallel phase process; reliability; synchronous digital hierarchy; Baseband; BiCMOS integrated circuits; Digital modulation; Forward error correction; Large scale integration; Modems; Phase modulation; Quadrature amplitude modulation; Signal processing; Synchronous digital hierarchy;
Conference_Titel :
Global Telecommunications Conference, 1992. Conference Record., GLOBECOM '92. Communication for Global Users., IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0608-2
DOI :
10.1109/GLOCOM.1992.276706
