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7616929 |
Cross-core calibration in a multi-radio system
A Radio Frequency (RF) transceiver includes a first RF transceiver group, a second RF transceiver group, local oscillation circuitry, and calibration control circuitry. Each of the RF transceiver...
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7598910 |
Direction finding and mapping in multipath environments
Determining the direction of a direct arrival path between a receiver and a transmitter in a multipath environment by determining a transmitter heading relative to the receiver as proportional to a...
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7598905 |
Systems and methods for monitoring transponder performance
There are presented various approaches to monitor performance of RF systems and circuitry such as those used in aircraft transponders. Such monitoring may be designed to verify operational...
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7592949 |
Near field electromagnetic positioning calibration system and method
A system and method for electromagnetic position determination utilizing a calibration process. For calibration, a transmitter is positioned at multiple locations in an area of interest and...
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7592948 |
System and method for dual polarization radar with automatic built-in test equipment and calibration
A method of calibrating a dual polarization weather radar system has been developed. The method first generates a transmission pulse from the radar system. The transmission pulse is then modified...
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7589665 |
Multistatic method and device for radar measuring a close distance
A multistatic detection device for measuring a distance to an object includes a transmitter and a receiver, each having a high-frequency oscillator and a pulse generator. The pulse generators can...
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7587174 |
Antenna unit and radio base station therewith
A radio base station apparatus provided with an array antenna having a plurality of antenna elements for calibrating a phase difference among the array antenna elements. The base station has a...
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7584020 |
Occupancy change detection system and method
A robot platform includes perceptors, locomotors, and a system controller. The system controller executes instructions for producing an occupancy grid map of an environment around the robot,...
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7583229 |
Method for detection of faulty antenna array elements
A method for early detection of faulty antenna arrays comprising the step of treating said detection as a special case of target recognition; wherein targets of interest are all previous examples...
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7583224 |
Radar apparatus with automatic local oscillator tuning function
The portion corresponding to a main bang signal leaking from a transmission/reception switching unit is extracted as a frequency estimation signal from an IF signal from a mixer in a signal...
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7579988 |
Method, device and system for determining direction of arrival of signal
A method, device and system for determining a DOA of a signal are described. Determination of the DOA of the signal may include receiving first and second UWB waveforms of the signal at one or more...
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7576686 |
Method and system for calibrating an antenna array for an aircraft surveillance system
In accordance with one aspect of the present invention, a method is provided for calibrating an aircraft surveillance system for a protected aircraft. The system has a phased antenna array...
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7576685 |
Radar sensor
A radar sensor having a transceiver device ( 10, 12 ), an analog/digital converter ( 14 ) for converting the received signals (A) into digital data, a memory device ( 18 ) for storing the digital...
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7573272 |
Antenna reconfiguration verification and validation
A method of testing the electrical functionality of an optically controlled switch in a reconfigurable antenna is provided. The method includes configuring one or more conductive paths between one...
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7570201 |
Radar exciter including phase compensation of the waveform generator
Phase compensation for the phase non-linearities introduced by the filters, amplifiers, and other microwave devices included in waveform generators in a radar system is achieved by first measuring...
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7562123 |
Systems and methods for distributed group formation and maintenance in geographically based networks
In a distributed sensor network, one or more devices, for example, forming a collaborative group, are associated with a physical phenomenon based on geographical proximity. The sensor network is...
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7555051 |
Method and device for estimating IQ imbalance
A quadrature transmitter and receiver have configurable I and Q channel paths that facilitate the application of selected test signals to determine gain and phase imbalances introduced by the...
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7554486 |
System and method for dual polarization radar with automatic built-in test equipment and calibration
A calibration system for the receiver of a dual polarization radar system has been developed. The system includes a radar transmitter that transmits signals in horizontal and vertical polarizations...
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7548189 |
Using radar targets of opportunity to build a monopulse calibration table
In a radar system, a monopulse calibration table is constructed from live targets of opportunity. A center of gravity or weighted average of normalized signals ΔV received at SUM and DIFF channels...
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7545321 |
Array antenna calibration apparatus and method
The apparatus comprises a calibration signal supply means, which supplies calibration signals to a plurality of antenna elements that are to be subjected to calibration; a calibration signal...
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7545313 |
Off-axis angle estimation method and apparatus using the same
Without using a traveling velocity of a vehicular object mounted with a radar device, an off-axis angle which is an offset angle between a reference direction of the radar device and a traveling...
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7538714 |
System for measuring physical relationship between vehicle and object
In a radar system installed in a vehicle, a first measuring unit measures a first physical relationship between the vehicle and a first object based on a received first echo signal A second...
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7535411 |
System and method for detecting drifts in calibrated tracking systems
A method and system for detecting drift in calibrated tracking systems used to locate features with respect to one or more coordinate systems allows medical devices to be accurately tracked within...
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7532156 |
Radar apparatus
In a radar apparatus having a plurality of antennas having switches respectively, malfunctions of the switches are detected by comparing the reception signal levels of the respective antennas with...
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7528767 |
Variable ratio power divider for a dual polarization radar system with automatic built-in test equipment and calibration
A variable ratio power divider (VRPD) used for adjusting a calibration signal for a dual polarization radar system has been developed. The VRPD includes an input line that receives a calibration...
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7525476 |
System and method for filling level determination
A method for determining a filling level of a product contained in a tank, by means of a radar level gauge system comprising a transceiver for generating, transmitting and receiving electromagnetic...
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7522097 |
Radar platform angular motion compensation
A method to compensate for radar platform angular motion may include measuring or estimating any radar platform angular motion. The method may also include substantially decoupling each array...
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7522096 |
Method for phase calibrating antennas in a radar system
A method for phase calibrating antennas in a radar system is disclosed. The method comprises providing a transmit antenna and two or more receive antennas, the receive antennas each in...
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7522090 |
Systems and methods for a terrain contour matching navigation system
Systems and methods for terrain contour matching navigation are provided. In one embodiment, a method for terrain contour matching navigation comprises: receiving at least one sample point...
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7501980 |
Method and device for calibrating sensors in a motor vehicle
A method and a device are described for calibrating at least two sensors, the sensors being of a different sensor type. The sensors may be located in or on a motor vehicle. It is possible to...
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7498977 |
Field probe form the angular response of a rigid body
Probing incident radar fields in a target test zone of a RCS test facility by exploiting angular radar response of a long and uniform rigid body supported horizontally across or vertically through...
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7498971 |
In-vehicle radar device
An in-vehicle radar device includes: phase storing means 12 that prestores the phase of a received wave incoming secondarily from outside a target; received wave importing means 13 that imports...
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7482971 |
Time-of-flight-ranging system and method for calibrating such a system
An embedded calibration mechanism and method for a time-of-flight ranging system. The calibration mechanism ( 200 ) comprises a channel ( 202 ) having known characteristics. Periodically or as part...
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7474259 |
Traffic sensor and method for providing a stabilized signal
A traffic sensor is mounted at a fixed location to monitor multiple lanes of traffic. The traffic sensor (a) generates a programmable time-varying modulating signal; (b) generates a modulated...
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7471237 |
Built-in missile RADAR calibration verification
Array antenna calibration verification coupling interrogator and responder with mode-related interrogation signal having a previous calibration phase angle, producing in responder a characteristic...
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7468690 |
Method and system for calibrating ESA, distributed waveform generator and receivers in sub-arrays
A system for calibrating waveform generators and receivers of non-overlapping electronic scanning antennas includes a first sub-array, a second sub-array and a calibration cable. The first...
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7446699 |
Error corrector for radar timing systems
A feedback loop corrects timing errors by reducing deviations from a constant radar sweep rate. Errors are detected and fed back to a phase corrector in a high gain feedback system. A precision...
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7446698 |
Pulse-coded remote calibration of an active phased array system
A method for remotely calibrating an active phased array system, and more particularly an antenna, (APA), used in transmission and/or in reception, comprising transmitting and/or receiving a set of...
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7446697 |
Method and system for calibrating radar altimeters
A method for calibrating an altimeter is disclosed. The method comprises monitoring signal strength of one or more altitude measurements. Based on the signal strength, the method applies piecewise...
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7439901 |
Active phased array antenna for aircraft surveillance systems
An active antenna is provided that includes an antenna element for transmitting RF transmit signals at a predetermined effective radiated power (ERP). An antenna module is configured to be mounted...
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7436350 |
Combined aircraft TCAS/transponder with common antenna system
The present invention is a combined aircraft TCAS/Transponder with common antenna system and transmitter. Common TCAS/Transponder multi-monopole top and bottom antennas may be connected to a top...
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7430070 |
Method and system for correcting angular drift of laser radar systems
A method of calibrating angle drift of a laser radar system is provided, in one aspect of the present invention. The method includes, providing a plurality of virtual fiducials into an xy scanner;...
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7429950 |
Method and apparatus to extend ADS performance metrics
A method and system are provided for measuring and monitoring performance metrics of a non-ADS-B tracking system and generating performance metrics for the non-ADS-B tracking system in terms of...
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7429948 |
Device and method for calibrating and improving the accuracy of barometric altimeters with GPS-derived altitudes
In a combined GPS/altimeter device, the calibration and hence the accuracy of barometric altimeter measurements are enhanced with the aid of derived altitudes from a GPS. The device determines the...
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7429947 |
Radar apparatus for detecting distance or velocity with respect to an object
A radar apparatus includes a plurality of receiver circuit systems to correspond with a plurality of receiving antennas. Channel signals having the same characteristics are generated by the...
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7423585 |
Navigation signal group delay calibration
Navigation signal group delay calibration methods and systems are described. In an embodiment, a code signal generated in a navigation system platform can be measured where the code signal includes...
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7417586 |
Methods and systems for interferometric cross track phase calibration
A method to compensate for variances in signal path delays for a plurality of radar return processing channels is described. The method comprises providing a signal in the signal path between an...
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7417580 |
Object detection system and object detection method
An object detection system includes a radar detection means ( 2 ), an image detection means ( 3 ), and a collating means ( 4 ). The collating means ( 4 ) performs a collation between an object...
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7411548 |
Reference beacon identification using transmission sequence characteristics
A method and apparatus for encoding information in a reference beacon signal for use in a time-difference-of-arrival/frequency-difference-of-arrival (TDOA/FDOA) geolocation system. Information is...
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7405696 |
Method for calibrating and AOA location system for frequency hopping air interfaces
A method for calibrating an antenna and signal processing system enabling angle of arrival (AOA) determination for a frequency hopping signal, in which a calibration coefficient is determined in...
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