Title :
A spread-spectrum system for indoor nonline-of-sight mobile applications
Author :
Geller, Benoit ; Fort, Charles
Author_Institution :
LERISS, Univ. Paris XII, Vitry sur Seine, France
fDate :
3/1/2000 12:00:00 AM
Abstract :
This paper describes a 256 kbit/s spread-spectrum system designed for indoor wireless applications with no direct path. The key element of the receiver is a differential phase shift keying (DPSK) surface acoustic wave (SAW) matched filter, and its design is described. The excellent performance of such a system is displayed using the case of mobile robotics inside a nuclear plant. Good agreement with theoretical results is also illustrated. Finally, we propose a bandlimited scheme allowing a very simple implementation of diversity with only one DPSK SAW demodulator
Keywords :
bandlimited communication; differential phase shift keying; digital radio; diversity reception; indoor radio; matched filters; mobile radio; mobile robots; radio receivers; spread spectrum communication; surface acoustic wave filters; 256 kbit/s; DPSK SAW demodulator; NLOS; SAW matched filter; bandlimited scheme; differential phase shift keying; diversity; indoor wireless applications; mobile robotics; nonline-of-sight mobile applications; nuclear plant; receiver; spread-spectrum system; surface acoustic wave matched filter; Acoustic waves; Delay; Differential phase shift keying; Differential quadrature phase shift keying; Electromagnetic propagation; Matched filters; Mobile robots; Power system reliability; Spread spectrum communication; Surface acoustic waves;
Journal_Title :
Vehicular Technology, IEEE Transactions on
