Title :
Direct carrier modulation for wireless digital communications using an improved microwave-photonic vector modulator (MPVM) approach
Author :
Chandramouli, S. ; Jimison, W.D. ; Funk, E.
Author_Institution :
Dept. of ECE, Lafeyette Coll., Easton, PA, USA
Abstract :
This paper presents a demonstration of direct carrier modulation via the use of an improved microwave/photonic vector modulator (MPVM). This modulation approach is suitable for direct digital modulation of microwave and millimeter-wave signals and allows for tuning of the carrier frequency over wide bandwidths and dynamic reconfiguration of the modulation format. An all-optical control approach is used to achieve faster data rates and better carrier tunability than previously reported work in this area. Specifically, experimental results showing direct QPSK and 16 QAM modulation of carrier frequencies between 1.0 and 2.0 GHz with data rates to 8 Mbs are presented.
Keywords :
digital radio; microwave photonics; modulators; quadrature amplitude modulation; quadrature phase shift keying; 1.0 to 2.0 GHz; 8 Mbit/s; QAM modulation; QPSK modulation; all-optical control; carrier frequency tuning; direct carrier modulation; direct digital modulation; dynamic reconfiguration; microwave signal; microwave-photonic vector modulator; millimeter-wave signal; wireless digital communication; Binary phase shift keying; Digital communication; Digital modulation; Frequency; High speed optical techniques; Optical attenuators; Optical control; Optical modulation; Quadrature phase shift keying; Wireless communication;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011903
