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False lock performance of Shuttle Costas loop receiversThe false (sideband) lock problem in Shuttle Costas loop receivers, in the presence of noise, is assessed. False lock margin is defined depending on symbol signal-to-noise ratio rather than in the absence of noise. Closed-form results are given for the case where the arm filters of the Costas loop are one-pole Butterworth filters as used in the Shuttle receivers. However, the approach taken is also general enough to cover filters of arbitrary characteristics. As part of the development of the false lock margin, it is shown that the false lock phenomenon of the squaring loop is identical to that of the Costas loop.
Document ID
19790035858
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Woo, K. T.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Holmes, J. K.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Huth, G. K.
(Axiomatix Los Angeles, Calif., United States)
Lindsey, W. C.
(Southern California, University Los Angeles, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
November 1, 1978
Publication Information
Publication: IEEE Transactions on Communications
Volume: COM-26
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Accession Number
79A19871
Funding Number(s)
CONTRACT_GRANT: NAS7-100
CONTRACT_GRANT: NAS9-14614
Distribution Limits
Public
Copyright
Other

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