Effects of Phase Noise and Thermal Noise upon Coherent PSK Demodulation and Their Impact on Phase Noise Specifications for Terminals of the Phase II DSCS.
Abstract
Future communication systems such as the Phase II DSCS will use coherent phase-shift keyed (PSK) modulation with forward error control (FEC) coding and will be transmitted at X-band frequencies. Since coherent PSK systems using FEC are especially sensitive to signal spectral purity and since spectral purity is directly proportional to the transmission frequency, very careful system designs must be used in X-band transmission systems. The ultimate objective of this effort is to provide guidance on spectral purity requirements for the Phase II DSCS terminals and associated frequency generation equipment. In this report the following immediate objectives are: (1) Evaluate expected phase noise performance of various combinations of existing modulation and terminal subsystems operating in the Phase II DSCS; and (2) Use this insight to generate methods for specification of allowable phase noise as a function of desired system performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1974
- Accession Number
- ADA100722
Entities
People
- H. I. Paul
- P. A. Kullstam
Organizations
- Computer Sciences Corporation