Title :
A timesaving acquisition procedure using sidelobe detection
Author :
Figucia, Robert J.
Author_Institution :
MIT Lincoln Lab., Lexington, MA, USA
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;
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
DOI :
10.1109/MILCOM.1991.258374
