NTRS - NASA Technical Reports Server

Back to Results
A digital beacon receiverA digital satellite beacon receiver is described which provides measurement information down to a carrier/noise density ratio approximately 15 dB below that required by a conventional (phase locked loop) design. When the beacon signal fades, accuracy degrades gracefully, and is restored immediately (without hysteresis) on signal recovery, even if the signal has faded into the noise. Benefits of the digital processing approach used include the minimization of operator adjustments, stability of the phase measuring circuits with time, repeatability between units, and compatibility with equipment not specifically designed for propagation measuring. The receiver has been developed for the European Olympus satellite which has continuous wave (CW) beacons at 12.5 and 29.7 GHz, and a switched polarization beacon at 19.8 GHz approximately, but the system can be reconfigured for CW and polarization-switched beacons at other frequencies.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Ransome, Peter D.
(Signal Processors Ltd. Cambridge, United Kingdom)
Date Acquired
September 5, 2013
Publication Date
August 1, 1988
Publication Information
Publication: JPL, Proceedings of the 12th NASA Propagation Experimenters Meeting (NAPEX 12)
Subject Category
Communications And Radar
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
No Preview Available