Title :
Design of differential QPSK modulator
Author_Institution :
Appl. Phys. Lab., John Hopkins Univ., Laurel, MD, USA
fDate :
6/20/1991 12:00:00 AM
Abstract :
A differential QPSK modulator operating at a centre frequency of 847.5 MHz and an input data rate of 25 Mbit/s is described. The modulator incorporates a simple differential encoder design that interfaces directly to the RF section without the need for special driver circuitry. The RF section uses modular ´building block´ components that can be changed relatively easily to support a wide range of centre frequencies.
Keywords :
digital communication systems; modulators; phase shift keying; 25 Mbit/s; 847.5 MHz; differential QPSK modulator; differential encoder; input data rate;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19910739
