DocumentCode :
955003
Title :
A differential-delay SAW correlator for combined DSSS despreading and DPSK demodulation
Author :
Haartsen, J.C.
Author_Institution :
Ericsson GE Mobile Commun. Inc., Research Triangle Park, NC, USA
Volume :
41
Issue :
9
fYear :
1993
fDate :
9/1/1993 12:00:00 AM
Firstpage :
1278
Lastpage :
1280
Abstract :
The design of a novel SAW (surface-acoustic-wave) component for the noncoherent detection of DS/SS (direct-sequence spread-spectrum) signals with a DPSK (differential phase-shift keying) modulation format is presented. In the considered differential-delay correlator, both the correlation function for despreading and the delay function for DPSK demodulation are merged into a single device. Due to the absence of a separate delay line, no bandwidth-limiting effects no high insertion losses occur in the delay branch of the DPSK demodulator. In addition, an exact match between the correlator output and its one-symbol-delayed replica is obtained. Experiments on an ST-quartz differential-delay correlator with a center frequency of 98.5 MHz, a chip rate of 12.3 MHz and a symbol rate of 195.4 kb/s demonstrated the operation of the device
Keywords :
correlators; delays; demodulators; phase shift keying; radio receivers; signal detection; spread spectrum communication; surface acoustic wave devices; 12.3 MHz; 195.4 kbit/s; 98.5 MHz; DPSK demodulation; DSSS despreading; ST-quartz differential-delay correlator; center frequency; correlation function; delay branch; delay function; demodulator; design; differential phase-shift keying; differential-delay SAW correlator; direct sequence spread spectrum communications; modulation format; noncoherent signal detection; novel component; one-symbol-delayed replica; output; surface-acoustic-wave; symbol rate; Correlators; Delay; Demodulation; Differential phase shift keying; Differential quadrature phase shift keying; Modulation; Phase detection; Signal design; Spread spectrum communication; Surface acoustic waves;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/26.237842
Filename :
237842
Link To Document :
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