Title

Differential phase shift keying direct sequence spread spectrum single SAW based correlator receiver

Abstract

This paper presents the design and measurement of a SAW device to be used in a correlator receiver for a differential phase shift keying direct sequence spread spectrum (DPSK/DSSS) system. The DPSK modulation format allows noncoherent data demodulation while the SAW device correlator acts as the despreading operator. In a conventional DPSK receiver, the received signal is normally split into a lower and upper path. One of the paths contains a correlator, and the other path contains a one data bit delay element and another correlator. The outputs of both paths are then fed to a noncoherent data demodulator. The device presented in this paper combines both the delay element and the two correlators in a single SAW device; therefore, a better temperature tracking mechanism, simplicity, as well as the elimination of the broadband SAW delay line are achieved. The SAW structure contains a broadband SAW transducer, and two serially coded pseudo noise (PN) DPSK filters. The SAW based correlator was built on lithium tantalate. The center frequency was set to 150 MHz, with a 63 chip PN spreading code and a data rate of 300 Kbps- Experimental measurements of the SAW device autocorrelation results are presented. © 1998 IEEE.

Publication Date

12-1-1998

Publication Title

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

Volume

45

Issue

3

Number of Pages

537-538

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/58.677597

Socpus ID

0032072471 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0032072471

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