Accession Number : ADD015622

Title :   Method and Apparatus for Determining Target Elevation Angle, Altitude and Range and the Like in a Monopulse Radar System with Reduced Multipath Errors.

Descriptive Note : Patent Application, Filed 29 May 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Howard, Dean D

Report Date : 29 May 1992

Pagination or Media Count : 30

Abstract : The present invention relates to a method and system for determining target elevation angle, altitude and range and the like in a monopulse radar system with reduced multipath errors. A transmitter/receiver unit receives monopulse sum and difference signals caused by echoes from targets. The sum and difference signals are then logarithmically-amplified in a logarithmic amplifier unit. A selector selects one of the sum and difference signals having the largest amplitude, and generates a selection signal indicating which of the sum and difference signals has the largest amplitude. The selection signal is provided to a search radar target tracking unit which determines whether a target at a given range interval and azimuth interval, for example, has been selected for tracking by an operator. The search radar target tracking unit then controls a gate unit to selectively provide either the logarithmically-amplified sum signal or the logarithmically-amplified difference signal to a peak detection unit based on the selection signal, and based on whether a particular target has been selected for tracking.

Descriptors :   *TRACKING, ALTITUDE, AMPLIFIERS, AMPLITUDE, ANGLES, AZIMUTH, CONTROL, DETECTION, ECHOES, ELEVATION, ERRORS, INTERVALS, INVENTIONS, LOGARITHMIC AMPLIFIERS, MONOPULSE RADAR, RADAR TARGETS, RECEIVERS, SEARCH RADAR, SELECTION, SIGNALS, TARGETS, TRANSMITTER RECEIVERS, TRANSMITTERS

Subject Categories : Direction Finding
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE