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7936300 |
Method for reducing multipath propagation effects during the processing of replies in mode “S”
The processing method according to the invention is a method of processing replies from targets interrogated by a surveillance radar according to a mode S interrogation of all the targets present...
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7920071 |
Augmented reality-based system and method providing status and control of unmanned vehicles
An augmented reality system identifies and controls a vehicle located within an environment. A tracking system obtains viewpoint information corresponding to a real-time view of the environment. A...
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7688250 |
Method for pre-detecting responses in a secondary radar or application to the detection of mode S responses
The invention relates to a method for pre-detecting responses in a secondary radar. It applies in particular to the detection of mode S responses. An aim of the invention is to process the signals...
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7619557 |
Method and device for filtering a video signal received by a secondary radar, particularly in order to eliminate mode S replies
The invention applies to secondary radars. It makes it possible to carry out filtering when seeking to detect SSR responses, these SSR responses being overlapped by a mode S response. According to...
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7570195 |
High-capacity location and identification system for cooperating mobiles with frequency agile and time division transponder device on board
Cooperating mobiles (ground vehicles, aircraft) are located and identified by Multilateration and Automatic Dependent Surveillance-Broadcast (ADS-B) techniques using the frequency band and the...
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7551120 |
Method and a system for filtering tracks originating from several sources and intended for several clients to which they are supplied
The present invention concerns a method and a system for filtering tracks originating from several sources and intended for several clients to which they are supplied. The method comprises at least...
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7397415 |
System and method for detecting and de-interleaving radar emitters
A method of classifying radar emitters includes the steps of: (a) receiving pulses from multiple radar emitters; (b) categorizing received pulses based on pulse data descriptors (PDWs); (c) forming...
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7277043 |
Tactical aircraft check algorithm, system and method
A method of generating aircraft tactical alerts includes receiving track positions for two aircraft; receiving trajectories and static conformance bounds for the two aircraft; receiving current...
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7095360 |
Secondary surveillance radar system, ground equipment for use therein, and response signal checking method applied thereto
A secondary surveillance radar system for use in surveillance of an airspace, which reliably achieves surveillance of the airspace even when an aircraft including a mode S transponder and an...
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6985102 |
Method and system for deinterleaving
A method of deinterleaving parameter descriptor word (PDW) data includes parallel scoring of pulses in an a posteriori search for associating of pulses based on proximity within a multi-parameter...
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6819282 |
Super-resolution processor/receiver to discriminate superimposed secondary surveillance radar (SSR) replies and squitter
A super resolution processor/receiver to discriminate superimposed secondary surveillance radar (Mode S, Mode A/C) replies and squitter that uses frequency-domain analysis to suppress interference...
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6727842 |
Digital IF processor
Apparatus for processing a signal of a predetermined intermediate frequency (IF) to generate in-phase (I) and quadrature (Q) components thereof comprises: an analog-to digital converter circuit for...
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6573858 |
Tandem-cycle target/track assignment method in combined radar/ADS surveillance environment
A target/track assignment method for a combined radar/ADS surveillance environment uses tandem cycles to help the air traffic control system update the order of system tracks, thereby permitting...
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6483453 |
Method for reducing transmit power for traffic alert and collision avoidance systems and airborne collision avoidance systems
The present invention provides a method for efficient use of the transmit power of a Traffic Alert Collision Avoidance System (TCAS) that allows enhanced surveillance range and limits radio...
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6337652 |
SSR station and aircraft secondary surveillance network
An SSR reply, which is sent out from an aircraft, is received and separated into one SSR reply to one SSR station and the other SSR reply to the other SSR station, thereby generating aircraft...
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6005510 |
Method for the processing of multiple paths
The invention relates to the processing of the multiple paths in an interrogator station which, in response to a salvo of interrogations, receives responses in the form of pulses. The station...
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5920278 |
Method and apparatus for identifying, locating, tracking, or communicating with remote objects
A broadband transmitter element, located at a remote object, transmits a broadband signal at a prescribed transmission time. A broadband receiver element, located at a base platform spaced from the...
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5596326 |
Secondary surveillance radar interrogation system using dual frequencies
A communication system is provided for identifying the position of aircraft in a surveillance area. The communication system includes a dual-frequency interrogator which produces two signals at...
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5583505 |
Radar pulse detection and classification system
A radar pulse detection and classification system receives times-of-arrival of pulses from simultaneous emitters over a wide range of pulse repetition frequencies (PRF's). The pulses are...
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5574459 |
Device for the detection and characterizing of radar pulses
The device comprises an analog-digital converter coupled between a pulse receiver and a device to extract the continuous level of the signal given by the receiver. The continuous level extraction...
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5486829 |
Method of communicating information between an S-mode secondary radar and a target
In a method of communicating data between a transmission/reception center and a target, a transaction is constituted by one or more interrogation pulses sent out by the center followed by one or...
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5477225 |
Method and apparatus for associating target replies with target signatures
Apparatus for associating target reply signals with target signatures, wherein each reply signal is received from a target transponder within a selectable time period, and further wherein each...
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5463398 |
Method and apparatus for multiple reply rejection when decoding transponder replay signals
Apparatus for rejecting multipath reply signals received from a target transponder within a selectable time period, comprising: a top antenna and a bottom antenna to detect reply signals; means for...
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5455586 |
Pulse recognition method and device, and use thereof for the filtering of the S mode responses of a secondary radar
Disclosed are a device for the detection of S mode responses received by a secondary radar receiver and its use for the filtering of the pulses contained in this response. The device furthermore...
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5432517 |
Method and device for the filtering of responses in a secondary radar extractor
A method for the defruiting of the responses from radar transponders received by a secondary radar in response to interrogations sent by the radar recurrently, a recurrence being formed by the...
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5406288 |
Method and device to improve the probability of validity of the codes of secondary radar responses
Disclosed are a method and device for the real-time processing of the responses constituted by pulse signals emitted by secondary radar transponders. The device has an analyzer of sampled...
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5394152 |
Radar processing apparatus and method
A radar processor comprises a multi-port memory device having memory which can be accessed by at least three ports. A first port receives input data from a data providing means. A second port...
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5387915 |
Method and apparatus for detecting and decoding transponder reply signals
Methods and apparatus for detecting and decoding transponder reply signals of the type having a plurality of associated time discrete pulses including two bracket pulses and a number of related...
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5367303 |
Parallel observer spatial evaluator
A method and means for evaluating transponder reply signals in a secondary radar system to differentiate valid replies from false replies. Transponder reply signals received by the interrogating...
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5341139 |
Method and device to detect the garbling of pulses received by a secondary radar
In a method for the detection of the garbling of pulses received by a secondary radar, the secondary radar comprises a monopulse antenna that can be used to obtain a pulse power signal and a pulse...
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5317316 |
Method of altitude track initialization in an aircraft tracking system
A method of processing a plurality of replies of target aircraft provided in response to interrogation signals from the surveillance aircraft during surveillance periods to determine whether an...
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5264853 |
Method of reducing false tracks due to suppression pulse replies in an aircraft tracking system
In an aircraft which has a tracking system, the aircraft interrogates all target aircraft in the vicinity of the aircraft in order to determine potentially dangerous situations. The interrogation...
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5220329 |
Monopulse reply extractor for SSR navigation systems
An SSR reply decoding system for separating pulse codes of a series of closely-spaced or overlapping SSR replies is disclosed. A delay line is connected to receive pulses representing the leading...
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5218365 |
Beacon interrogator beamwidth control using sidelobe signal integration in transponders
A method for inhibiting responses by transponders to interrogation signals originating in the side lobes of an interrogating radar of a secondary radar system. The interrogating radar first...
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5142287 |
Technique for demodulating and decoding MLS DPSK transmissions using a digital signal processor
A system for demodulating and decoding differential phase shift keying (DPSK) transmissions utilizes a bandpass filter, an analog to digital converter and a digital signal processor. Removal of the...
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5126744 |
Beacon and mode-4 defruiter
A defruiter for filtering fruit replies from a reply data signal in a radar system. The defruiter includes a window memory, a main memory, a counter and a main defruiter. Another version of the...
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5089822 |
Interrogation signal processor for air traffic control communications
The present invention is directed to a Mode S uplink or interrogation signal demodulation system which can quickly recognize the Mode S signal and also filter out of noise present in the Mode S...
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5081457 |
Apparatus for reducing synchronous fruit in TCAS surveillance systems
A system wherein TCAS transmissions have two jitter components added to the jitter component utilized in the interscan interval to minimize TCAS interference with ground station operation. The...
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5063386 |
Device for the detection of the signals of transponders interrogated by a secondary radar in the presence of multiple-path phenomena
The device improves the decoding of the replies in S mode deformed by multiple-path phenomena or by imbrication with replies in standard A or C mode. To do this, the device carries out the...
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4945550 |
ATCRBS/SIF/TCAS reply decoder
A decoder for separating pulse code modulated messages of the type used in ATCRBS where the messages are identified by two framing pulses separated by 20.3 us. and contain information pulses...
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4899157 |
Leading edge detector/reply quantizer
An improved Leading Edge Detector/Pulse Quantizer (LED) for use in a pulse code communications system. A prior LED included three shift registers for storing in relative time order, according to...
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4896158 |
Beacon fruit filter
A method and apparatus for prefiltering received target and fruit replies to filter out more obvious occurrences of fruit replies in an air traffic control system. A detector detects reply signals...
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4796030 |
Dual threshold amplitude detector
An amplitude detector is disclosed passing only video input signals whose voltage amplitudes are within specified minimum and maximum limits, and is particularly useful in a secondary radar system...
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4761651 |
Pulse discriminating system for reply signals in a transponder
A pulse discriminating system for reply signals and the like in transponders which may independently and correctly discriminate respective pulse trains in the case where a plurality of reply...
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4642638 |
Apparatus for generating enhanced/regenerative bracket decode signals
An improved bracket decoder apparatus including an enhanced bracket decoder ortion and a regenerative bracket decoder portion operates to generate enhanced bracket decode signals and regenerative...
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4314247 |
Degarbler for an interrogator-transponder system
A degarbler for an interrogator-transponder system with a reply code consisting of two framing pulses which enclose code pulses representative of a reply. The degarbler comprises in combination: a...
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4180815 |
Radio identification systems
To enable a transponder in a radio identification system, such as a secondary surveillance radar system, to remain responsive to a new interrogating signal received while it is processing a...
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4174519 |
Method for the improved utilization of response signals in a _secondary radar system and a secondary radar system for implementing the method
The time interval between the pulses of an interrogation signals transmitted to aircraft in the vicinity of an airport is varied at will in accordance with air traffic conditions. The time interval...
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4137531 |
Radar selective interrogation system
An aircraft ground movement monitoring system is provided similar to that described in co-pending U.S. patent application Ser. No. 608,214, now U.S. Pat. No. 4,109,248, that makes use of an...
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4109248 |
Radar systems
A secondary radar system for establishing the position and identity of aircraft etc. on airfields, particularly for controlling their ground movements during bad visibility, comprises a pair of...
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