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Quasi-light Storage for Optical Data Packets
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Differential phase shift keying direct sequence spread spectrum single SAW based correlator receiver.

F Moeller1, M A Belkerdid, D C Malocha

  • 1RF Monolithics, Dallas, TX.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|February 5, 2008
PubMed
Summary
This summary is machine-generated.

This study introduces a novel Surface Acoustic Wave (SAW) device for differential phase shift keying direct sequence spread spectrum (DPSK/DSSS) systems. The integrated SAW correlator simplifies receivers, improving temperature tracking and eliminating bulky components.

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Materials Science

Background:

  • Differential Phase Shift Keying Direct Sequence Spread Spectrum (DPSK/DSSS) systems require efficient correlator receivers for noncoherent demodulation.
  • Conventional DPSK receivers utilize separate correlators and delay elements, leading to complexity and potential performance issues.

Purpose of the Study:

  • To design and measure a novel Surface Acoustic Wave (SAW) device integrating delay and correlation functions for DPSK/DSSS systems.
  • To enhance receiver simplicity, improve temperature tracking, and eliminate the need for broadband SAW delay lines.

Main Methods:

  • A single SAW device was fabricated on lithium tantalate, incorporating a broadband SAW transducer and two serially coded pseudo-noise (PN) DPSK filters.
  • The device was designed for a 150 MHz center frequency, utilizing a 63-chip PN spreading code and operating at a 300 Kbps data rate.

Main Results:

  • The integrated SAW device successfully combined delay and correlator functions, simplifying the receiver architecture.
  • Experimental measurements validated the device's autocorrelation performance for DPSK/DSSS signal processing.

Conclusions:

  • The developed SAW correlator offers a more compact and potentially higher-performance solution for DPSK/DSSS receivers.
  • This integrated approach demonstrates significant advantages in terms of simplicity and thermal stability compared to conventional designs.