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4136340 |
Sequential probability ratio test for friend identification system
The present invention involves apparatus for performing a sequential problity ratio test to make decisions in a Friend Identification System. The apparatus determines a product of sequential ratio...
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4119966 |
Clutter discriminating apparatus for use with pulsed doppler radar systems and the like
In apparatus for discriminating targets from clutter, a high threshold circuit for passing only signals with sufficient amplitude and a lower threshold circuit passing signals of a sufficient...
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4110753 |
Device for processing signals from a coherent pulse radar
A device for processing radar signals which enable precise Doppler information to be obtained. The signals, demodulated in cartesian coordinate X and Y and then coded are converted into polar...
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4074264 |
Adaptive threshold clutter processor
A time sampling adaptive clutter processor that samples on a scan to scan basis rather than on an area basis and in response to signals received from the object being interrogated develops a mean...
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4070673 |
Radar video digital processor
A video processor for a track-while-scan radar system, wherein each radar return, within a tracking window, is given a range weight corresponding to the range bin within the range sweep and an...
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4068231 |
Automatic clutter-mapper
A system for detecting the presence of clutter utilizing an area overlap technique that effectively rejects scintillating position clutter near the boundaries of the area clutter map ACM cells. A...
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4062012 |
Digital radar signal processor
A radar signal processor employs digital circuits to provide two adaptive resholds which act to reject clutter and noise. A digital constant false alarm unit serves to set the first threshold level...
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4030096 |
Automatic target detector
Apparatus which automatically detects targets of interest in line scanned amplitude modulated data systems such as side scan radar or sonar. The apparatus examines a received signal for target...
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4025919 |
Automatic target detector
Apparatus which automatically detects targets of interest in line scanned amplitude modulated data systems such as side scan radar or sonar. The apparatus examines a received signal for certain...
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4005415 |
Automated radar data processing system
An automated radar data processing system comprised of signal processing cuitry and programmed general purpose digital computer apparatus performs detection, classification and tracking of all...
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4005416 |
Apparatus for processing radar video signals
A video detector wherein the ratio of the energy contained in a range cell of interest to the average energy contained in adjacent range cells is obtained. When the two ratios are both greater than...
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4001823 |
Pulse radar method and system
A pulse radar system which is designed for installation on a vehicle. A control pulse generating circuit is triggered by the trailing edge of a transmitting pulse to generate a pulse train...
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3992710 |
Target tracker having target recognition means
A monopulse radar system having automated target identification capability. first target recognizer, which can recognize a desired target by its radar signature, is used to improve direction...
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3981008 |
Navigational and collision avoidance apparatus
Marine surface radar processing equipment provides digitized target range pulses at a plurality of ranges, and includes target evaluation apparatus that comprises target leading edge signal means...
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3978480 |
Method of identifying the patterns of radar signals
In a PPI display type radar system wherein a sector shaped unit scanning surface is established in a scanning plane and a unit scanning surface is shifted progressively in the radial and...
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3976999 |
Airborne target recognition system
In a radar target acquisition system means are provided for analyzing the video return including an automatic gate circuit causing the range gate to sweep out, and to sequentially sample the video...
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3940762 |
Digital detection criteria control device for video mapping, detection parameter control, optimum radar receiver selection and rejection of non-moving targets
A digital detection criteria control device for use in a radar tracking system incorporating a memory that is electronically synchronized to a surveillance radar in a manner to perform video...
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3919707 |
Radar video processing system
A system in which radar video returns are processed by first converting the returns from each range bin into a multibit code. Codes from a 3x3 range bin pattern, from the same range interval, are...
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3906498 |
Radar interface method and system
A method and system for interfacing a variable interpulse period radar system with a fixed interpulse period output device is disclosed. The radar interpulse period is varied in a predetermined...
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3905032 |
Data extraction, particularly data extraction for radar stations
Data extraction system for radar stations wherein tracked targets are locd in a tracking gate or window based upon points determined by a tracking computer. More particularly, the system includes a...
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3902171 |
Accumulator radar echo detector
An accumulator radar echo detector for generating continuous target indication signals at associated range rings of a PP1-radar screen, wherein a numerical accumulation device and associated...
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3898651 |
Memory noise canceler
A noise canceler for use with radar memory stores wherein memory store out signals below a predetermined value are subtracted from the memory store input and memory store output signals above the...
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3878530 |
Radar video processing apparatus
1. An apparatus for processing successive video sweeps generated by a radar system and quantized into a series of range bins each including a 1 or a 0 representing a target hit or no target hit,...
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3875569 |
Target detection system in a radar system employing main and guard channel antennas
In an airborne radar system of the type including a main high gain narrow beamwidth antenna and a guard low gain wide beamwidth antenna with main and guard receiver channels, a detection system...
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3868685 |
RADAR DIGITAL DETECTOR AND BEAM SPLITTER
This radar signal detector system utilizes a full amplitude digital moving window cross correlator that integrates all of the video amplitude information from a target illuminated by a scanning...
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3849779 |
MULTIPLE TARGET INDICATOR AND DISCRIMINATOR
A multiple target indicator and discriminator is provided for use on a tring radar of the sequential lobe type. Multiple targets occurring within one radar beam-width cause the radar return signal...
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3836964 |
AUTOMATIC DATA PROCESSOR
An automatic data processor which allows a completely automatic track-while-scan function to be performed with a pencil beam radar. Multi-level detection systems are employed to process quantized...
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3831174 |
AUTOMATIC TARGET ACQUISITION IN MTI RADAR SYSTEM
An airborne MTI radar system is disclosed for searching and tracking airborne targets over large bodies of water. In the search mode, returns from staggered PRF's are used to resolve range...
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3806929 |
METHOD FOR THE DETECTION OF RADAR TARGETS
Method and apparatus for detecting targets in high sea states and sea clur. A comparison is made of a stored representation of doppler spectrums from sea returns free of targets with instantaneous...
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3803603 |
METHODS OF DETECTION OF AIR, SPACE OR SUBMARINE TARGETS BY REFLECTION OF ELECTROMAGNETIC OR ACOUSTIC WAVES
A method of detection of air, space or submarine targets by reflection of electromagnetic or acoustic waves, comprising performing two successive scanning operations, the scanning operations...
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3797014 |
AUTOMATIC RADAR TARGET DETECTION AND SCAN CONVERSION SYSTEM
The specification discloses an automatic detection system for use with, for example, an airborne radar system. Automatic gain control circuitry is responsive to a predetermined false alarm rate for...
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3789396 |
RADAR APPARATUS
There is disclosed radar apparatus including a digital feedback indicator which, while including a minimum number of bits, is more precise, - for example, its precision is adequate for automatic...
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3775770 |
METHOD AND MEANS FOR PERFORMING DISTRIBUTION-FREE DETECTION OF SIGNALS IN NOISE
Input data representative of a variable environment including both signals nd noise is delayed by multiple equal delay increments to generate identical multiple versions in delayed form, the time...
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3739377 |
METHOD AND APPARATUS FOR TARGET DISCRIMINATION IN A CLUTTER ENVIRONMENT
A method and apparatus for improved detection of radar targets in a clutter nvironment are disclosed. Basically, a plurality or series of so-called video slicer circuits are selectively preset to...
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3731304 |
TRACK-BEFORE-DETECT SYSTEM
1. A track detection system comprising; receiving means for receiving refted radio frequency signals from an object in a given medium, range storage means operatively coupled to said receiving...
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3727218 |
DIGITAL RADAR DETECTOR SYSTEM
An automatic digital target detector and azimuth measuring system that includes a digital filter whose amplitude weighting function corresponds to the antenna beam pattern so as to provide a...
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3720942 |
VIDEO PROCESSING SYSTEM
A system for automatically processing quantized normal and MTI radar video to provide improved clutter rejection and improved detection of moving targets in clutter. The quantized MTI video is...
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3683380 |
CASCADED DIGITAL INTEGRATOR TARGET DETECTION SYSTEM
An automatic radar target detector system, in a radar receiving system, which performs antenna beam shape weighting as a part of the detection process. A first select control circuit controls the...
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3680095 |
AUTOMATIC DETECTION CRITERIA CONTROL UNIT FOR PENCIL BEAM RADARS
An automatic detection criteria control system for pencil beam radar in which video returns are coded and correlated to provide target reports. The amplitude of the coded returns from each range...
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3631486 |
PROCESSING METHOD AND COMMUTATION SYSTEM FOR PULSE DOPPLER RADAR
In a pulse Doppler radar system, a threshold level for target detection is automatically adjusted as a function of clutter and noise. A commutation network for interrogating each of a plurality of...
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3614626 |
RADAR DETECTOR SYSTEM
A system is disclosed for improved detection of signals in the presence of noise and interference. It employs a distribution-free criteria to indicate either the presence or absence of signal. A...
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3603989 |
TWO-STAGE RADAR SYSTEM
1. An improved multiple-resolution-element radar system comprising; means r developing multiple-resolution-element data having a first order of resolution; means for developing...
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3500396 |
BACKGROUND AVERAGING SYSTEM FOR IMPROVING RADAR TARGET DETECTION
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3460137 |
TRACK INITIATION SYSTEM
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3412397 |
Video correlator and automatic detector for pencil beam radar
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3399404 |
Target detector for acquisition radar
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3386091 |
Statistical zero target recognition system
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3386077 |
Digital signal processing system
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3353177 |
Radar clutter video processing system
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3343162 |
Clutter cancelling system
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