Accession Number : ADD011796

Title :   Simultaneous Detection of Time Coincident Signals in an Adaptive Doppler Tracker.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Roeder,A W

Report Date : 23 Apr 1985

Pagination or Media Count : 12

Abstract : The performance of an adaptive digital doppler tracker having a sample data phase locked loop is improved by a circuit that detects and demodulates interfering signals. The tracker has a coherence sensor that provides signals indicating coherence and non-coherence conditions. An amplitude sensor generates a strong signal when interfering (time coincident) signals are received. The tracker includes both a coherent data detector and SSB processor. An interference detector receives the outputs of the coherence sensor and the amplitude sensor and generates and SSB enable signal in response to the coincidence of a strong sigal and a non-coherent condition signal. The SSB enables the SSB processor which detects both interfering signals. (Author)

Descriptors :   *PATENTS, *COMMUNICATION EQUIPMENT, *TRACKING, ADAPTIVE SYSTEMS, PHASE LOCKED SYSTEMS, SINGLE SIDEBAND COMMUNICATIONS, VOICE COMMUNICATIONS, DATA TRANSMISSION SYSTEMS, MICROCOMPUTERS

Subject Categories : Direction Finding
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE