STUDY OF ADAPTABLE COMMUNICATIONS SYSTEMS
Abstract
Studies on adaptable communication systems are reported, covering both adaptable receivers and repeat-request feedback systems using error-detection codes. The study on error-detecting codes deals with a multi-stage error-detection repeat-request system in which the receiver performs error detection on small blocks of binary digits and requests a repeat of each block in which an error is detected. It is shown that even with feedback errors the system has a high efficiency with a low probability of undetected error. Optimum thresholds are determined for use in dual-rate transmission over fading channels in conjunction with error-detection coding. The remaining studies deal with adaptable receivers. One investigation demonstrates the utility of a rake-type system for orbital dipole channels. The rake system studied is a generalization of the conventional rake system and has the advantage of allowing analog as well as digital modulation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 14, 1962
- Accession Number
- AD0286504
Entities
People
- D. Chesler
Organizations
- Sylvania Electric Products