Title :
A robust SAW-based chirp-π/4 DQPSK system for indoor applications
Author :
Gugler, W. ; Springer, A. ; Weigel, R.
Author_Institution :
Inst. for Commun. & Inf. Eng., Johannes Kepler Univ., Linz, Austria
Abstract :
A high data-rate wideband chirp spread spectrum system for indoor communication is proposed. The use of chirp signals with the well known pulse compression technique makes the system extremely robust and therefore suitable for applications in an industrial environment. By using π/4 DQPSK modulation, overlapping chirp signals, and optimized chirp signal design we get data rates up to 70 Mbps. There is no need for sophisticated digital signal processing due to the use of surface acoustic wave (SAW) filters for the generation and filtering of the chirp signals. Production tolerances, temperature drift, and other system imperfections are shown to be either negligible or can easily be tracked. Simulation results reveal that the limiting factor for the data rate is intersymbol interference caused by multipath propagation
Keywords :
differential phase shift keying; filtering theory; indoor radio; intersymbol interference; multipath channels; pulse compression; quadrature phase shift keying; signal synthesis; spread spectrum communication; surface acoustic wave filters; 70 Mbit/s; SAW filters; SAW-based chirp-π/4 DQPSK system; chirp signal filtering; chirp signal generation; high data-rate; indoor applications; indoor communication; industrial environment; intersymbol interference; multipath propagation; optimized chirp signal design; production tolerances; pulse compression; robust system; simulation results; surface acoustic wave filters; temperature drift; user mobility; wideband chirp spread spectrum system; Chirp modulation; Design optimization; Digital filters; Indoor communication; Pulse compression methods; Robustness; Signal design; Spread spectrum communication; Surface acoustic waves; Wideband;
Conference_Titel :
Communications, 2000. ICC 2000. 2000 IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-6283-7
DOI :
10.1109/ICC.2000.853604
