A Programmable Surface Wave Ultrasonic Matched Filter.
Abstract
A new spread spectrum transmission technique is described which can efficiently convey information in asynchronous bursts. Theoretical predictions are provided to establish the baseline performance of this technique for the special case where 8 data bits are transmitted in each burst. The implementation of an experimental simplex transmission system is described which makes extensive use of Surface Acoustic Wave (SAW) devices for signal generation and matched filter detection. The design and experimental performance is displayed for the state-of-the-art SAW devices as well as the entire simplex system. It is shown that eight SAW filters capable of generating 127 chip pseudonoise codes at a 50 MHz chip rate can be coherently combined into a single burst and also matched filter demodulated. It is further shown that discrete addressing of the transmitted bursts can be accomplished by permutation of the order of transmission of the 8 individual codes within a burst.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1974
- Accession Number
- ADA002837
Entities
People
- John B. Gadoury Ii
- Manfred B. Schulz
- Manfred G. Unkauf
Organizations
- RTX