Coherence of Harmonically Related CW Signals
Abstract
Measurement data from NORLANT '72 exercise for two harmonically related CW signals, 128 Hz and 85 Hz, have been processed to obtain the phase angle relationship between them as a function of time. The results show that the relative phase angle stayed unchanged or varied slowly with time in most cases but fluctuated greatly in the fading zone. The influence on the coherence of these signals due to hydrophone array configurations, noise, and multipath interference is discussed with some theoretical analysis. The technique for measuring the phase angle for the study of coherence relations presents some useful applications.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 22, 1974
- Accession Number
- ADB181912
Entities
Organizations
- Naval Underwater Systems Center