Improvements in deep-space tracking by use of third-order loops.Third-order phase-locked receivers have not yet found wide application in deep-space communications systems because the second-order systems now used have performed adequately on past spacecraft missions. However, a survey of the doppler profiles for future missions shows that an unaided second-order loop may be unable to perform within reasonable error bounds. This article discusses the characteristics of a simple third-order extension to present second-order systems that not only extends doppler-tracking capability, but widens the pull-in range and decreases pull-in time as well.
Document ID
19730038604
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Tausworth, R. C.
Crow, R. B. (California Institute of Technology, Jet Propulsion Laboratory, Telecommunications Div., Pasadena Calif., United States)