Accession Number : ADD004597

Title :   Synchronizer for Frequency Hopping Receiver.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Malm,Robert E

Report Date : 10 May 1977

Pagination or Media Count : 7

Abstract : A receiver of a fast frequency hopping (FFH) system is synchronized with a sending transmitter in three phases from a starting condition where the frequency hopping local signal leads the received signal prior to synchronization. During the first phase, the difference frequency of a frequency hopping received signal and the frequency hopping local signal is monitored for IF during each FFH period. Then in the next phase, the IF in the two halves of each FFH period is compared to ascertain whether more of the leading half or more of the trailing half of each FFH period has the IF and the phase of the local signal is adjusted until the phase difference between the frequency hopping local signal and the frequency hopping received signal is less than a predetermined minor fraction of an FFH period.

Descriptors :   *Patents, *Frequency agility, *Frequency synthesizers, *Receivers, Synchronization(Electronics), Spread spectrum analysis

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE