DIGITAL PROCESSING RECEIVER STUDY.
Abstract
Results of an engineering investigation of digital processing receivers are described in this report. Both analytical and experimental work are discussed. Two general aspects to digital receivers are studied: (1) measurement of envelope/amplitude and (2) phase/frequency. A major consideration in the evaluation of these digital techniques is the maximum modulation frequency which can be demodulated accurately (in the absence of noise) for a given clock rate. Two types of phase demodulation receive major attention: the 'arcsine' demodulator which employs in-phase and quadrature channel measurements, and the digital phase-locked loop (DPLL). Both the effects of quantization noise and additive thermal noise are considered for each of these techniques. Several forms of delta-modulator A/D converters are treated in the amplitude/envelope investigation. In addition, variable slope or adaptive delta modulators are described which have an increased dynamic range with respect to 'slope-overload.' (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1968
- Accession Number
- AD0835767
Entities
People
- David T. Magill
- Francis D. Natali