Acoustic Signal Processing Devices.
Final rept. 1 May 72-20 Sep 73,
HUGHES AIRCRAFT CO FULLERTON CALIF GROUND SYSTEMS GROUP
Pagination or Media Count:
ING, Correlation techniques, Transmitter receiversAcoustic surface waves, Lithium niobatesThe objective of this program was to develop the analytical and experimental techniques required to implement phase coded filters with surface wave delay lines. The scope of the program was also extended to apply this technology to the development of a transceiver system that would demonstrate the principles of spread spectrum communications. This report includes an analysis of the various error sources in surface wave delay lines and their impact on the correlation properties of bi-phase coded waveforms. Response characteristics of an improved set of 127 chip delay lines made on lithium niobate substrates is also reported. The development of an experimental spread spectrum transmitterreceiver system is discussed in detail and the problems encountered in developing the 508 tap phase coded delay lines used in this system are also reviewed. The report concludes with recommendations for future transceiver designs using surface wave delay lines as the prime signal processing elements. Author
- Line, Surface and Bulk Acoustic Wave Devices
- Non-Radio Communications