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8334800 |
On-vehicle radar device
A radar device includes: a frequency modulating unit for modulating a frequency of a transmission signal by a triangular wave; a transmitting unit for pulsing the frequency modulated transmission...
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7876261 |
Reflected wave clock synchronization
A radar system has a phased-array antenna and plural local oscillators for controlling local transmit/receive units. The local oscillators are slaved to a master oscillator. The analog clock signal...
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7649925 |
Time transfer utilizing ultra wideband signals
Time is transferred from an ultra wideband (UWB) transmitter to UWB receiver by transmitting a signal structure having an associated timing reference point together with a time value for the timing...
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7486221 |
Methods and systems for using pulsed radar for communications transparent to radar function
A method and system are disclosed where transmitted radar pulses are utilized for both a radar sensing function and for data communications. The data communications are performed in a manner that...
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7397420 |
Timing adjustment method for radar, and radar apparatus having automatic timing adjusting function
On/off timing of an amplifier and timing of antenna selection are accurately adjusted. When adjusting the on/off timing of the amplifier, modulation of a transmit signal is stopped, and a switch is...
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7254401 |
Network-based method and system for determining a location of user equipment in CDMA networks
A method and system for determining a location of a user equipment using RTT measurements from a connected node B and RTT measurement of other node Bs which are not connected to the user equipment....
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7075477 |
Radar
A radar includes a transmission signal processing system, a reception signal processing system, an auxiliary signal processing system, a transmission-signal input unit, and a search determination...
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7071868 |
Radar detection method and apparatus
A radar system and method use a radar FMCW chirp having variable chirp characteristics.
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6989784 |
Transmission-reception apparatus and operation determination method thereof
A transmission-reception apparatus includes a transmission section, a reception section, a transmission control section, a signal detection section, and an operation determination section. The...
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6982634 |
Method and apparatus for reducing blind spots in obstacle detection
A method and apparatus for reducing blind spot in obstacle detection as a vehicle moves in reverse relate to widening the transmission angle on two sets of ultrasonic transducers located at the...
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6894635 |
System and method for correction of discontinuities in an antenna model
A system and method is provided for detecting emitter signals and for determining a scan strategy for a receiver system that receives such emitter signals. When revisit times are computed for each...
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6873284 |
System and method for non-maximum dwell duration selection for use in detecting emitter signals
A system and method is provided for detecting emitter signals and for determining a scan strategy for a receiver system that receives such emitter signals. Typically, the minimum dwell duration of...
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6697011 |
Doppler radar device
A doppler radar device having comparing means 142 for comparing the level of pulse signal to be transmitted, sampled through a burst gate, with a predetermined threshold value and search means 143...
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6650274 |
Radar imaging system and method
An imaging system and method. The invention provides an intra-pulse repetition interval (PRI) agile beam technique for enhanced resolution that can be used at aspect angles near the velocity vector...
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6452536 |
Antenna system
A method for scheduling radar transmissions for a phased array antenna system having at least two antenna faces, in which each respective antenna face is configured to receive echoes of possible...
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6272446 |
System and a method for measuring a continuous signal
A system, and method of operating the system, for measuring a continuous signal, having at least two transducers for measuring the continuous signal and for each outputting a signal relating to the...
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6201819 |
Process for transmitting data packets from mobile stations to base stations in mobile radio systems operated on the time multiplex system
A process for the transmission of data packets from mobile stations to base stations in mobile radio systems operated by the time-division multiplex method where an effective utilization of...
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6064331 |
Pulse repetition frequency section method and system
The objectives of the invention are met by an improved radar tracking system and a process of radar tracking. In the improved system and process, an estimate of a target range and a range...
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5973636 |
Radar apparatus with a simplified construction
A single antenna is used so that time-division transmission and reception is carried out in a radar apparatus for obtaining a distance and a relative speed with respect to a target object based on...
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5831569 |
Method and apparatus for injecting synthetic pulses for increased transmitter stability
An apparatus and method for improving stability in a transmitter receiving a staggered pulse train includes maintaining a constant temperature of the transmitter at the start of each pulse of the...
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5095312 |
Impulse transmitter and quantum detection radar system
Pulses of short duration are radiated by an impulse radar transmitter wit time domain intervals under control of a clock to monitor a moving target from which echo pulses are reflected. The echo...
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4942403 |
Phased-array radar
A phased-array radar capable of electronically directing a directional beam of an antenna in any of N different directions, i.e., direction θ1 to direction θN. Scanning of the directional beam is e...
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4912473 |
Radar equipment
A radar equipment comprising a display unit (FIG. 1) and a scanning unit (FIG. 2) linked together by electrical conductors (94,72,106,26) for the transmission of information and/or control signals...
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4746922 |
Method of and device for removing range ambiguity in a pulse-doppler radar and radar including such a device
This invention relates to a method of and a device for removing range ambiguity in a pulse Doppler radar and to a radar including such a device especially for missile guidance. On tracking...
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4710774 |
Aircraft collision avoidance system
A communication system particularly adapted for use in an aircraft collision avoidance system wherein the transmitted portions of messages exchanged between aircraft consist of pulses or pairs of...
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4668950 |
Encoding apparatus and method for a position coded pulse communication system
Pulse position coding is used to transmit several channels of data from a ground radar transmitter to a receiver in an airborne, remotely-piloted vehicle. The system is designed to ignore...
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4654665 |
Radar system
A radar system comprises means for forming a transmission pulse signal as m sets of n pulses, the individual sets having respective PRPs Ti (i=1, 2, . . . , m) moving target detection means, and...
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4642641 |
Variable PRF target tracking radar
A high PRF pulse doppler radar for tracking moving targets is described wherein the PRF of the transmitted signal is varied within predetermined PRF limits to keep the target reflected high PRF...
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4593286 |
Method of operating an agile beam coherent radar
A method of time scheduling mode dwell times corresponding to a multiplicity of targets, displaced in angle, range and velocity, in the frame time of an agile beam coherent radar without reducing...
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4375641 |
Method in a tracking radar to attain a large unambiguous range for detected targets by means of radar pulses with high repetition frequency
The invention relates to a method for a tracking radar which transmits radar pulses towards a certain target whose target range from the beginning is known. The carrier frequency of the transmitted...
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4320397 |
Echo tracker/range finder for radars and sonars
An echo tracker/range finder or altimeter in which the pulse repetition frequency (PFR) of a predetermined plurality of transmitted pulses is adjusted so that echo pulses received from a reflecting...
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4308538 |
AICBM Decoy resolution by coherent integration
A receiver in a radar system has two feed horns which supply a hybrid. The ybrid sums the amplitude of the signals from the feed horns at its first output and subtracts the signals at its second...
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4292638 |
Augmented radiometric system
An improved microwave radiometric system features the employment of incoherent noise illumination of a selected target for improving the measured radiometric temperature contrast between the target...
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4225863 |
Simplified system for estimating pulse radar doppler frequency
A method for determining doppler frequency by the measurement of the maxi pulse-to-pulse difference over one doppler cycle. A box-carred (sample-and-hold) phase detector's output is differentiated...
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4143373 |
Adaptive radar systems and methods therefor
Radar systems in which target detection and unambiguously measured range rate are derived from returns from a high pulse repetition frequency (PRF) transmitted waveform; and wherein a lower PRF...
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4128835 |
Method and apparatus for measuring distance between an aircraft and a ground station
A distance measuring system is provided including a ground station transponder continuously transmitting a repeating pseudorandom coded bit pattern, and at least one aircraft interrogator receiving...
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4126859 |
Ground station for a round-trip-path distance-measuring system
This DME ground station permits the distance from the touchdown point (where no transponder can be installed) to be measured on the aircraft without any change in the airborne equipment. The time...
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4106017 |
System for sensing velocity through the use of altimetry signals
A system for determining the relative velocity of two objects in a direction substantially transverse to a line between them wherein a first of the objects, for example an aircraft, transmits a...
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4086590 |
Method and apparatus for improving the slowly moving target detection capability of an AMTI synthetic aperture radar
Detection of slowly moving and stationary targets that are normally obscured by ground clutter is accomplished by an AMTI synthetic aperture radar system that utilizes multiple receiving antennas...
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4064510 |
High repetition frequency side-looking pulse radar system
The invention relates to side-looking radar systems and more especially to high altitude airborne radar systems functioning at a high repetition frequency. In order to avoid ambiguities in regard...
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4014021 |
Radar for short range measurements
In a radar installation for measuring distances by transmitting and receig signal modulated by sequences of pseudo-random bits, generation both of the sequence of pseudo-random bits and of...
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4001824 |
DME timing apparatus and methods
A ranging timer allows decoded data pulses to toggle a flip flop, thereby initiating a transmission cycle. In a specific embodiment, the data pulses condition a second flip flop to energize the DME...
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3875549 |
TRANSMITTER TRIGGER CIRCUIT FOR ECHO-SOUNDERS OR SIMILAR DEVICES
The invention relates to a device for adjusting the trigger timing of distance measuring equipment based on measuring the delay time for reflection of transmitted pulses of energy, e.g....
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3858208 |
AUTOMATIC PRF SELECTION TO OPTIMIZE RANGE AND DOPPLER VISIBILITY IN RADAR TRACKING
A radar system is disclosed which uses an established track predicted range, Rp, and radial velocity, Rp, of a target to select a frequency, F, and PRF for optimum range and doppler visibility in...
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3833904 |
AIRBORNE SWITCHED ARRAY RADAR SYSTEM
An airborne radar system is disclosed utilizing multiple fixed antenna arrays mounted within the periphery of the aircraft to avoid aerodynamic modifications and optimumly placed to achieve 360° ...
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3801981 |
REMOTE CLOCK SYNCHRONIZATION SYSTEM
A system for the precise synchronization of high frequency electronic clo by providing each station other than the master station with a tracking circuit. The tracking circuit consists of an early...
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3792476 |
METHOD AND SYSTEM OF COMMUNICATION BETWEEN SEVERAL GROUND STATIONS AND A TRANSPONDER SATELLITE
A method of communication between several ground stations and a transponder satellite by time-division multiple access (TDMA) operation, which comprises combining the time-multiplexed and preambled...
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3778827 |
SHORT RANGE MONOPULSE MARINE SEARCH RADAR FOR SMALL OBJECT DETECTION
The subject invention comprises a short range monopulse marine search radar for detecting small targets such as channel markers in the water. The radar has its antenna directed so that its...
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3760414 |
BASE BAND VEHICLE SAFETY APPARATUS
A vehicle safety apparatus includes directive radio means for the detection of an impending collision with another vehicle and for actuation of restraining or other safety devices for protecting...
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3742498 |
SYNCHRONIZATION AND POSITION LOCATION SYSTEM
A master station and N slave stations include synchronization equipment to enable each of the stations to have access to a common repeater in a different one of M time slots of a TDM format at the...
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