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7592944 |
System and method for intrusion detection using a time domain radar array
A system and method for highly selective intrusion detection using a sparse array of ultra wideband (UWB) radars. Two or more UWB radars are arranged in a sparse array around an area to be...
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7576687 |
RF front-end circuitry with reduced DC offset
An RF front-end circuit includes a directional coupler, a mixer, and a reflection circuit. The directional coupler is adapted to receive an antenna signal and an oscillator signal. The mixer is...
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7548192 |
Method of mapping steel reinforcements in concrete foundations
A method of mapping steel reinforcements in an existing concrete foundation. The method includes determining the depth of the concrete foundation. Further the method entails transmitting radar...
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7541968 |
System and method for detecting an intruder using impulse radio technology
An intrusion detection system and method are provided that can utilize impulse radio technology to detect when an intruder has entered a protection zone. In addition, the intrusion detection system...
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7515092 |
Sub-frame synchronized residual radar
A method of using a wireless communication system to determine locations is provided. The method including exchanging communication frames between at least two synchronized nodes in the...
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7446695 |
Precision pulse detection system for radar sensors
A precision pulse detection system for time-of-flight sensors detects a zero axis crossing of a pulse after it crosses above and then falls below a threshold. Transmit and receive pulses flow...
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7439899 |
Encoded transmitted signals in a simultaneous dual polarization weather system
A system for simultaneously propagating dual polarized signals in a polarimetric radar system includes a system for coding at least one of the two signals. The simultaneous dual polarization...
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7417581 |
System and method for intrusion detection using a time domain radar array
A system and method for highly selective intrusion detection using a sparse array of time modulated ultra wideband (TM-UWB) radars. Two or more TM-UWB radars are arranged in a sparse array around...
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7414567 |
ADS-B radar system
A system and method of using a standard ADS-B transmitter and encoder to identify targets to provide a collision avoidance system, wherein the method includes the steps of providing a standard...
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7411539 |
Method for detecting the presence of radar signal emitters, an electronic support measures unit and a system for determining the position and identity of said emitters
A method for passively detecting the presence of radar signal emitters, in which an ESM unit receives radar signals with a number of antennas, each antenna covering a sector of the surrounding...
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7379016 |
Carrier phase detection system for radar sensors
A pulse detection system for expanded time radar, laser and TDR sensors detects specific cycles within bursts of cycles. A sensor transmits and receives short bursts of RF cycles. A transmit pulse...
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7355545 |
Through the wall ranging with triangulation using multiple spaced apart radars
A plurality of multi-tone CW radars are used to generate a swath of ranges to a moving object or individual behind a wall or building structure in which the overlap of the range swaths from...
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7345617 |
Apparatus for collecting ground radar data with polarization information
The present invention concerns an apparatus for collecting ground radar data with polarization information comprising a main body exhibiting structure for moving the apparatus along the ground, a...
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7336219 |
System and method for generating a radar detection threshold
A method for generating a radar detection threshold includes computing a first plurality of percentile values associated with frequency domain values of frequency domain signals. The first...
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7304604 |
Radar sensor and method for operating a radar sensor
In a radar sensor, a continuous microwave signal is passed through an RF switch which is periodically controlled by a pulse signal. The pulse signal is frequency modulated in such a way that the...
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RE39759 |
Time domain radio transmission system
A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in...
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7236120 |
Ultra-wideband detector systems for detecting moisture in building walls
A non-destructive detection method and system enables detecting a moisture patch located inside a building wall or the like. A transmitter generates a series of ultra-wideband pulses while an...
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7224944 |
RF transceiver having a directly radiating transistor
Transistor package leads form quarter-wave antenna elements that directly radiate RF energy into free space without the need for a separate antenna. The transistor operates at a fundamental...
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7199747 |
Generating a fine time offset using a SiGe pulse generator
A method and apparatus for generating short electronic pulses using a modified differential trigger that is partly an analogue sinusoidal voltage and partly a selectable, DC voltage. The...
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7161526 |
Broadband radar and modulator, in particular for microwave switching over a very short period
The present invention relates to an ultrawideband radar. It also relates to a modulator, in particular for switching microwaves over a very short duration. The radar includes a modulator modulating...
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7151477 |
Signal detection
A transmitted signal and a received signal are combined and the combination is expected to determine whether or not a target signal is present. Either the transmitted signal or the received signal...
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7129886 |
System and method for detecting an intruder using impulse radio technology
An intrusion detection system and method are provided that can utilize impulse radio technology to detect when an intruder has entered a protection zone. In addition, the intrusion detection system...
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7129843 |
LC resonant circuit with amplification device
A security tag includes a combination of a resonant frequency circuit with an adjacent amplification shield for enhancing output signal amplitude. The amplification shield is located adjacent to...
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7095357 |
Method and apparatus for transmitting electromagnetic signals into the earth at frequencies below 500 KHz from a capacitor emplaced on the surface of the earth or raised aloft in an aircraft
A method and apparatus comprising four co-planar metallic plates, two for transmission and two for reception, in which each pair of co-planer metallic plates of overall length L are disposed either...
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7075476 |
Ultra-wideband smart sensor interface network and method
A network, sensor and method are provided that utilize the capabilities of impulse radio technology to help monitor and/or control the environment within a building. In particular, the network...
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7071869 |
Radar system using quadrature signal
A radar system using a quadrature signal includes a quadrature push—push oscillator for generating four harmonics with a 90-degree phase difference from each other, and producing two-balanced 2...
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7068210 |
Low-cost position-adaptive UAV radar design with state-of-the-art cots technology
A position-adaptive radar method and device for small UAV platforms capable of detecting “leakage signals” that, for example, propagate between two buildings or “leak through” penetrable...
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7046187 |
System and method for active protection of a resource
An active protection system comprising an ultrawideband radar for threat detection, an optical tracker for precision threat position measurement, and a high powered laser for threat kill or...
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7046186 |
Friend/foe identification system for a battlefield
The invention relates to an IFF apparatus for ground applications, which comprises: (a) an encoder for forming an interrogating or response sequence of pulses, and conveying the same to a UWB...
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7009912 |
Method and system for detection of broadband energy
A system and related method for the detection of low power broadband signal sources in a high noise environment. The system uses multiple collinear arrays of sensors to receive data signals. The...
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6989782 |
Ultra-wideband radar system using sub-band coded pulses
Methods and apparatus are provided for radar systems using multiple pulses that are shorter than the expected range delay extent of the target to be imaged. In one implementation, a method for...
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6930631 |
Sensor front-end with phase coding capability
A sensor front end for an electronic radar sensor is disclosed that provides for a lower parts count while providing technical functionality by using multifunction parts, i.e., parts that are used...
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6867727 |
Multiplatform multifunction avionics architecture
A system-of-systems avionics architecture that is compatible with futuristic multi-function multi-platform sensor applications. The method and device of the invention is based on localized...
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6812884 |
Transceiver system and method utilizing nanosecond pulses
A transceiver for short-pulse radar applications is disclosed in which a shift register or the like is used to collect return signal information in a manner to reduce the number of transmit pulses...
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6801153 |
Spread spectrum radar with leak compensation at baseband
A spread spectrum radar system, characterized in that the receive radar signal is mixed down to baseband and applied to leak cancellation means for subtracting therefrom an attenuated delayed...
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6791734 |
Method and apparatus for information modulation for impulse radios
A method and apparatus for information modulation for impulse radios are presented in both single-tone and pulse stream configurations. The modulation techniques include combinations of amplitude...
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6753803 |
Signal detection
A transmitted signal and a received signal are combined and the combination is expected to determine whether or not a target signal is present. Either the transmitted signal or the received signal...
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6617996 |
Ground penetrating radar with audible output
A ground penetrating radar system including a processor for generating audible output signals having discrete frequency components representative of the depth of buried targets. The amplitude of...
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6606051 |
Pulse-responsive dipole antenna
A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna,...
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6531977 |
Pulse center detector for radars and reflectometers
The pulse center detector (PCD) produces an amplitude-independent center-triggered range output for precision radar rangefinders and TDR systems. Pulse center triggering is accomplished by...
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6529154 |
Method and apparatus for reading two dimensional identification symbols using radar techniques
A method and apparatus are provided for sensing two-dimensional identification marks provided on a substrate or embedded within a substrate below a surface of the substrate. Micropower impulse...
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6512474 |
Ultra wideband signal source
A method and system to create an ultra wideband (UWB) signal are disclosed. The UWB signal comprises a carrier frequency with each cycle reversing in phase. The UWB signal is generated from a...
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6469657 |
FFT-based filtering for low-quality signal direction finding
A radio direction finding system for a low signal quality transmission signal performs a Fast Fourier Transform (FFT) on an entire received RF band into a number of FFT bins, each serving as an IF...
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6462696 |
Radar apparatus
The invention provides a man-portable, non-ground-contacting, ultra-wide band impulse radar system ( 1 ), the system having separate transmit and receive antennae located in a common non-metallic...
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6456231 |
Radar sensor having a CFAR detector
A constant false alarm rate (CFAR) detector prevents false radar triggers due to RF interference by proportionally increasing the radar detection threshold as interference increases. The radar...
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6429805 |
Low-cost radar with high-resolution imaging
A radar including a plurality of reception antennas corresponding to a plurality of homodyne reception channels, and a transmission antenna positioned with respect to the plurality of reception...
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6429801 |
Method and apparatus for precursor based radar
A method and apparatus is described for signal processing to identify an object in an environment. A precursor associated with an electromagnetic wave interacting with the object is received and a...
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6404377 |
UHF foliage penetration radar antenna
A low cost array with wide band elements interleaved into an “egg-crate” structure. The radiating elements are flared notch radiators. Good impedance match over a wide band was achieved by...
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6384773 |
Adaptive fragmentation and frequency translation of continuous spectrum waveform to make use of discontinuous unoccupied segments of communication bandwidth
Identity transform filters, such as sin(x)/x filters, are used to coherently fragment the frequency continuum of a wideband waveform, such as an ultra wideband radar signal, into a plurality of...
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6377201 |
Radar and method therefor
A radar ( 300 ) comprises a transceiver ( 302 ) for transmitting pulses directed to a subsurface area of interest ( 102 ) and for receiving a reflected wave ( 210 ) from the subsurface area of...
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