Accession Number : ADD016005

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, Filed 29 May 92, patented 31 Aug 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Howard, Dean D

Report Date : 31 Aug 1993

Pagination or Media Count : 18

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 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 :   *MONOPULSE RADAR, *PATENTS, *POSITION FINDING, *RADAR TRACKING, ALTITUDE, AMPLIFIERS, AMPLITUDE, ANGLES, AZIMUTH, ECHOES, ELEVATION, ERRORS, INVENTIONS, LOGARITHMIC AMPLIFIERS, RADAR, RADAR TARGETS, RECEIVERS, SEARCH RADAR, SIGNALS, TARGETS, TRANSMITTER RECEIVERS, TRANSMITTERS, RANGE FINDING, TARGET DETECTION

Subject Categories : Active & Passive Radar Detection & Equipment
      Target Direction, Range and Position Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE