Investigation of Continuously Variable Slope Delta Modulator/Demodulator Compatability.
Abstract
A computer model of the continuously variable slope delta voice encoding system specified in the draft STANAG on 'Analogue/Digital Conversion of Speech Signals for Tactical, Digital Area Communication Systems', dated June 1978, is developed and implemented in FORTRAN IV. The model's performance is then characterized in terms of idle channel noise, total harmonic distortion, intermodulation distortion, signal-to-noise ratio, and frequency response. For each of these attributes, the system's performance is presented graphically and compared to the criteria established in the draft standard. The model is then exercised by varying the system parameters to the limits imposed by the standard and the resulting performance compared to the previously determined ideal system performance. The results show that the performance characteristics measured are most sensitive to the primary integrator response and output filter response when the system parameters are restricted to the range allowed by the draft NATO standard. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1980
- Accession Number
- ADA100781
Entities
People
- Jeffrey Allan Lersch
Organizations
- Air Force Institute of Technology