A timesaving acquisition procedure using sidelobe detection

Author

Figucia, Robert J.

Author_Institution

MIT Lincoln Lab., Lexington, MA, USA

fYear

1991

fDate

4-7 Nov 1991

Firstpage

814

Abstract

The author describes a downlink acquisition procedure designed for a frequency-hopped, man-portable, EHF satellite communications terminal. The acquisition procedure uses a very low energy threshold to allow synchronization to occur on signals received in sidelobes. The probability of a false alarm due to noise above threshold is reduced by using an algorithm to identify the signal pattern from among the threshold crossings. After the initial synchronization, the spatial search continues in order to align the mainlobe with the satellite. This procedure leads to a reduction in acquisition time when compared to a traditional acquisition scheme that acquires only through the mainlobe

Keywords

antenna radiation patterns; frequency agility; military systems; satellite relay systems; signal detection; EHF satellite communications terminal; acquisition time; downlink acquisition; energy threshold; false alarm probability; frequency hopping; mainlobe; man portable terminal; military systems; sidelobe detection; signal pattern; spatial search; synchronization; timesaving acquisition; Azimuth; Downlink; Flowcharts; Frequency synchronization; Laboratories; Noise reduction; Satellites; Uncertainty; Watches; Wrist;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1991. MILCOM '91, Conference Record, Military Communications in a Changing World., IEEE

Conference_Location

McLean, VA

Print_ISBN

0-87942-691-8

Type

conf

DOI

10.1109/MILCOM.1991.258374

Filename

258374