Efficient data association with multivariate Gaussian distributed states
Accordingly, an object of the invention is to track a plurality of objects, or fuse a plurality of data sets, in a computationally efficient manner. Another object is to track a plurality of N objects... Read More
Inventors: Collins, Joseph B.; Uhlmann, Jeffrey K.;, Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC) |
Detector having a constant false alarm rate
The present invention is an improved constant false alarm rate detector circuit in which the variable threshold circuit includes a bistable device such as a tunnel diode which has a first low voltage ... Read More
Inventors: Nicolson, Alexander M.; Mara, Richard M.;, Assignee: Sperry Rand Corporation (New York, NY) |
Short pulse microwave source with a high prf and low power drain
What is claimed is: 1. Apparatus for generating a high voltage, very short pulse, microwave signal operating at a high pulse repetition frequency comprises: means for generating said high voltage and ... Read More
Inventors: Ross, Gerald F.; Mara, Richard M.; Rollins, Kenneth W.;, Assignee: Anro Engineering, Inc. (Lexington, MA) |
High speed transient sampler
What is claimed is: 1. A high speed sampler, comprising: a sample transmission line for transmitting an input signal; a strobe transmission line including a conductive strip for transmitting a strobe ... Read More
Inventors: McEwan, Thomas E.;, Assignee: The Regents of the University of California (Oakland, CA) |
Method and apparatus for reducing a ripple signal in an output of a direct current power supply
An aspect of the present invention is a method for reducing an output ripple signal of a power supply for supplying a DC voltage and current to a load. The method comprises the steps of sensing one of... Read More
Inventors: Gaetano, Mauro Luigi;, Assignee: Motorola, Inc. (Schaumburg, IL) |
Method and apparatus for improving utility of automatic dependent surveillance
The present invention provides an improved apparatus and method for use with Automatic Dependent Surveillance--Broadcast (ADS-B). In a method and apparatus of the present invention, each ADS-B equippe... Read More
Inventors: Smith, Alexander E.; Evers, Carl;, Assignee: Rannoch Corporation (Alexandria, VA) |
Doppler radar detection system
OF THE PREFERRED EMBODIMENTS FIG. 1 illustrates the principal features of the invention. A doppler radar receiver provides received signal A which is filtered by doppler processor 1 and processed by ... Read More
Inventors: Long, Maurice W.;, Assignee: |
Nonhomogeneity detection method and apparatus for improved adaptive signal processing
Briefly stated, the present invention discloses apparatus and method for improving detection of targets in a radar system that employs adaptive filtering. A nonhomogeneity detector eliminates nonhomog... Read More
Inventors: Melvin, William L.; Wicks, Michael C.; Chen, Pinyuen;, Assignee: The United States of America as represented by the Secretary of the Air (Washington, DC) |
Method and system for determining the integrity of a received signal
The present invention satisfies the above described needs by providing an improved system and method for determining the integrity of a received signal in a frequency tracking environment. Briefly des... Read More
Inventors: Daughtry, Jr., Earl A.; Ruff, Mark A.;, Assignee: Matsushita Communications Industrial Corporation (Peachtree City, GA) |
Method for detecting weak signals in a non-gaussian and non-stationary background
A method is described for detecting weak signals in a non-Gaussian and non-stationary background using a hidden Markov parameter estimator. The method comprises the steps of: a) partitioning input dat... Read More
Inventors: Stein, David W. J.;, Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC) |
Phaselock threshold correction
In accordance with the present invention, there is provided a noise estimator for threshold correction of phaselock in a receiver where a noise estimating circuit provides threshold correction of phas... Read More
Inventors: Stephens, Donald R.; Mosley, Jr., William;, Assignee: Raytheon Company (Lexington, MA) |
Adaptive control of the detection threshold of a binary integrator
The present invention achieves technical advantages as an apparatus, method and system of dynamically estimating a coefficient of variation of the fluctuation of a waveform and an optimal binary detec... Read More
Inventors: Frey, Jr., Thomas Lawrence;, Assignee: Lockheed Martin Corporation (Bethesda, MD) |
Communications receiver arrangement
In accordance with a first aspect of the invention, there is provided a communications receiver arrangement for the receipt of digital data, comprising: means for receiving digital data encoded in acc... Read More
Inventors: Barker, Andrew J.;, Assignee: Marconi Communications Limited (Coventry, GB) |
Guided wave radar level transmitter with automatic velocity compensation
In accordance with the invention there is provided a guided wave radar transmitter with automatic velocity compensation. Broadly, in accordance with one aspect of the invention there is disclosed a gu... Read More
Inventors: Berry, James M.; Gard, Alan M.;, Assignee: Magnetrol International (Downers Grove, IL) |
Methods and apparatus for providing robust synchronization of radio transceivers
The present invention fulfills the above-described and other needs by providing a multi-part digital preamble for use in transmitting digital data packets. Advantageously, a preamble according to the ... Read More
Inventors: Mattisson, Sven; Persson, Joakim; Haartsen, Jacobus Cornelius;, Assignee: Telefonaktiebolaget L M Ericsson (Stockholm, SE) |
Noncontact position and orientation measurement system and method
Accordingly, a need has arisen for an improved technique having greater flexibility and applications for position measurement than prior systems. In accordance with the present invention, a noncontact... Read More
Inventors: Junkins, John L.; Hughes, Delcan; Schaub, Hanspeter;, Assignee: The Texas A&M University System (College Station, TX) |
Airborne biota monitoring and control system
OF THE DRAWINGS The instant invention combines knowledge of physical and behavioral characteristics of insect pests, beneficials, and neutrals, as well as other biota, with knowledge of capabilities ... Read More
Inventors: Guice, David L.; Green, Augustus H.; Dent, Jr., William V.;, Assignee: |
Multilateration auto-calibration and position error correction
The Multilateration Auto-Calibration & Position Error Correction System of the present invention is a truly passive method of error detection and correction. The system utilizes the Side Lobe Suppress... Read More
Inventors: Smith, Alexander E.; Lee, Derrick D.;, Assignee: Rannoch Corporation (Alexandria, VA) |
Method and apparatus for correlating flight identification data with secondary surveillance radar data
The present invention includes hardware, software, and a methodology for correlating flight identification data with aircraft registration numbers. In a first embodiment featuring a 1090 MHz receiver,... Read More
Inventors: Smith, Alexander E.; Cohen, Bennett; Evers, Carl;, Assignee: Rannoch Corporation (Alexandria, VA) |
Scan type radar device
A first object of the present invention is to solve the problems in the above-mentioned on-vehicle radar device in the prior art and provide a scan type radar device capable of assuredly acquiring the... Read More
Inventors: Matsui, Sadanori; Shinagawa, Tokio; Kishida, Masayuki; Ono, Daisaku;, Assignee: Fujitsu Ten Limited (JP) |
Interference suppression circuit and method thereof for multi-channel receivers
OF THE DRAWINGS A better understanding of the present invention may be realized by considering the following details and description, taken in conjunction with the accompanying drawings wherein: FIG.... Read More
Inventors: Sullivan, William B.;, Assignee: |
Electric generator arrangement
What is claimed is: 1. An electric generator arrangement comprising at least two wheels arranged to rotate side by side on a common stationary shaft and whereof one supports a field-producing part and... Read More
Inventors: Schonball, Walter;, Assignee: |
Fluid driven power producing apparatus
What is claimed is: 1. An apparatus for use in converting the kinetic energy of an accelerated fluid into mechanical or electrical energy and which comprises: a. a housing; b. two substantially parall... Read More
Inventors: Schneider, Daniel J.;, Assignee: |
Aerodynamic lifting mechanisms
What I claim is: 1. An aircraft comprising: a body with two sides; an engine mounted within said body; means on each side of said body for lifting said aircraft including: a first shaft extending in a... Read More
Inventors: Shaw, Harry;, Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government (London, GB) |
Apparatus for controlling a plurality of electrical devices
It is, therefore, an object of the present invention to provide an apparatus for controlling a plurality of electrical devices, which apparatus would not need a large space for the installation thereo... Read More
Inventors: Nakano, Osamu; Ina, Toshikazu; Kawai, Hisasi;, Assignee: Nippon Soken, Inc. (Nishio, JP) |
Field control for wind-driven generators
We have now discovered a method and apparatus for precisely controlling the field current on a wind-driven generator, whereby the tip speed ratio can be readily held at a substantially constant, prede... Read More
Inventors: Soderholm, Leo H.; Andrew, James F.;, Assignee: The United States of America as represented by the Secretary of (Washington, DC) |
Alternating comparator circuitry for improved discrete sampling resistance control
In accordance with the invention, an alternating comparator circuit, as e.g. for realizing an improved discrete sampling resistance control, utilizes a pair of comparators, which may be provided with ... Read More
Inventors: Bloomer, Milton D.;, Assignee: General Electric Company (Schenectady, NY) |
Stress-crack resistant ethylene-perhaloethylene terpolymers
I claim: 1. Terpolymers of from about 40 to 60 mol percent ethylene, from about 60 to about 40 mol percent of a halogenated comonomer selected from the group consisting of tetrafluoroethylene, chlorot... Read More
Inventors: Schulze, Stephen R.;, Assignee: Allied Chemical Corporation (Morris Township, NJ) |
Nitrile rubber hydrogenation
The nitrile rubber hydrogenated in this invention is a polymer comprising a conjugated C.sub.4 -C.sub.6 diolefin and a C.sub.3 -C.sub.5 unsaturated nitrile. The conjugated C.sub.4 -C.sub.6 diolefin i... Read More
Inventors: Rempel, Garry L.; Guo, Xiang-Yao;, Assignee: Polysar Rubber Corporation (Sarnia, Ontario, CA) |
Aromatic copolyamide from naphthalene dicarboxylic acids
I claim: 1. A copolyamide which comprises substantially 55-90 mole % of a repeating unit represented by the following formula: ##STR5## and 45-10 mole % of a repeating unit represented by the followin... Read More
Inventors: Koide, Shunichi;, Assignee: Showa Shell Sekiyu Kabushiki Kaisha (JP) |
Radio 
