Temperature-invariant pulse compression using s.a.w. devices
Abstract
The hyperbolic f.m. chirp signal is derived and is shown to possess compression performance invariant to temperature differences between surface-acoustic-wave expansion and compression filters. The compressed output approximates to a sin x/x envelope, and the use of sidelobe weighting techniques is considered. Choice of signal parameters to minimise range/temperature ambiguity is indicated, and a constant-amplitude form of the signal is shown to possess similar properties. The similarities between the Doppler and temperature transformation suggest an up-conversion technique that would yield compression performance invariant to both temperature and Doppler shifts for very wideband signals. Such a system is postulated and shown to have other advantages.
- Publication:
-
IEE Journal of Microwaves Optics and Acoustics
- Pub Date:
- January 1977
- Bibcode:
- 1977JMOA....1...70T
- Keywords:
-
- Chirp Signals;
- Frequency Modulation;
- Pulse Compression;
- Surface Acoustic Wave Devices;
- Temperature Effects;
- Broadband;
- Doppler Effect;
- Phase Shift;
- Radar Transmission;
- Sidelobes;
- Electronics and Electrical Engineering