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Pulse stuttering as a remedy for aliased ground backscatterAn algorithm that aides in the removal of ground scatter from low frequency Mesosphere, Stratosphere, Troposphere (MST) radar signals is examined. The unwanted ground scatter is shown as a sequence of velocity plots which are almost typical at the various altitudes. The interpulse period is changed in a cyclic way, thereby destroying the coherence of the unwanted signal. The interpulse period must be changed by an amount at least equal to the transmitted pulse width, and optimum performance is obtained when the number of different interpulse period occupies a time span greater than the coherence time of the unwanted signal. Since a 20-msec pulse width is used, it was found convenient to cycle through 50 pulses, the interpulse period changing from 2 msec to 3 msec during the 1/8-second time. This particular pattern of interpulse periods was provided by a software radar controller. With application of this algorithm, the unwanted scatter signal becomes incoherent from one pulse to the next, and therefore is perceived as noise by the coherent integrator and correlator.
Document ID
19840019030
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bowhill, S. A. (Illinois Univ. Urbana, IL, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1983
Publication Information
Publication: International Council of Scientific Unions Middle Atmosphere Program, Vol. 9
Subject Category
Communications And Radar
Accession Number
84N27098
Funding Number(s)
CONTRACT_GRANT: NSF ATM-81-20371
CONTRACT_GRANT: NSG-7506
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19840019008Collected WorksMiddle Atmosphere Program. Handbook for MAP, volume 9
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