A unique design of a voiceband adaptive delta modem will be presented. The modulator utilizes a constant amplitude variable width pulse combined with the principles of delta modulation. This results in a modem that has lower amplitude distortion, requires less transmission channel bandwidth, and is less prone to slope overload than conventional adaptive delta modems. The design also allows the use of a simple single integration demodulator while maintaining fidelity.
The modem design and analysis is presented assuming a transmission channel which is bandwidth limited and amplitude limited.
Martin, Robert J.
Master of Science (M.S.)
College of Engineering
Length of Campus-only Access
Masters Thesis (Open Access)
Milne, Gregory L., "Pulse Width Modulated Adaptive Delta Modern Design and Analysis" (1986). Retrospective Theses and Dissertations. 4955.