Entries |
Document | Title | Date |
20090102700 | METHOD AND SYSTEM FOR REDUCING POWER LOSS OF TRANSMITTED RADIO WAVE THROUGH COVER - In a power-loss reducing system, a transmitting unit causes a radar to transmit a measurement radio wave, and a power monitoring unit monitors power of the measurement radio wave transmitted from the radar through a cover while changing a positional relationship between the cover and the radar. An extracting unit extracts a value of the changed positional relationship between the cover and the radar based on a result of the monitoring of the power such that the extracted value of the positional relationship allows reduction of power loss of a radar wave transmitted, through the cover, from the radar located based on the extracted value of the positional relationship. | 04-23-2009 |
20090121919 | VOR MONITORING RECEIVING APPARATUS AND VOR MONITOR RECEIVING METHOD - A VOR monitoring receiving apparatus includes a receiving circuit for receiving a field signal from a VOR apparatus, and outputting content of the field signal to a plurality of signal systems, first and second monitoring receiving circuits provided in first and second signal systems included in the plurality of signal systems, respectively, for monitoring the content of the field signal, a self-check signal generator for generating a self-check signal necessary to confirm whether the first and second monitoring receiving circuits normally operate, a VOR monitoring controller for detecting an abnormality of the VOR apparatus based on monitoring results of the first and second monitoring receiving circuits, a switch for performing switching to alternately output the field signal and the self-check signal to the first and second signal systems, and a switch controller for controlling the switch to perform switching whenever a preset time elapses. | 05-14-2009 |
20100026560 | METHOD AND SYSTEM FOR ANTENNA TRAINING AND COMMUNICATION PROTOCOL FOR MULTI-BEAMFORMING COMMUNICATION - A method and system for antenna training for communication of multiple parallel data streams between multiple-input multiple-output communication stations is provided. An implementation involves performing antenna training by obtaining optimal antenna training coefficients by multi-stage iteration in estimating the multi-dimensional beamforming coefficients. | 02-04-2010 |
20100066591 | RADAR SYSTEM CHARACTERISTIC DETERMINATION - The invention is related to radar system characterization. In one embodiment, a radar module characterization system comprises a target, a conveyor comprising at least one connector configured to removably couple a radar module to the conveyor and to linearly displace the radar module relative to the target, and a control system communicatively coupled to the conveyor. In another embodiment, a method comprises linearly displacing a radar module relative to a target, transmitting a signal from the radar module toward the target, and determining a characteristic of the radar module based on a reflection of the signal from the target. | 03-18-2010 |
20100073219 | METHOD OF ELECTROMAGNETIC INTERFERENCE ASSESSMENT - A method of electromagnetic interference assessment applicable to a receiver, comprising the following steps: initially, scanning a plurality of frequencies; next, for each scanned frequency, measuring corresponding signal strength value; finally, based on the correspondence between the frequencies and the signal strength values, acquiring an analysis curve graph, furthermore assessing the extent of electromagnetic interference occurring in the receiver through the acquired analysis curve graph. | 03-25-2010 |
20100171650 | MULTI-ANTENNA MEASUREMENT METHOD AND MULTI-ANTENNA MEASUREMENT SYSTEM - There is provided a multi-antenna measurement method of measuring a device under test having at least two receive antennas and capable of considering the spatial correlation between antennas in a simpler configuration. Two different uncorrelated signal sequences “a” and “b” are generated by the pseudo base transceiver station | 07-08-2010 |
20100214157 | Range gated holographic radar - Narrow virtual transmit pulses are synthesized by differencing long-duration, staggered pulse repetition interval (PRI) transmit pulses. PRI is staggered at an intermediate frequency IF. Echoes from virtual pulses form IF-modulated interference patterns with a reference wave. Samples of interference patterns are IF-filtered to produce high spatial resolution holographic data. PRI stagger can be very small, e.g., 1-ns, to produce a 1-ns virtual pulse from very long, staggered transmit pulses. Occupied Bandwidth (OBW) can be less than 10 MHz due to long RF pulses needed for holography, while spatial resolution can be very high, corresponding to ultra-wideband (UWB) operation, due to short virtual pulses. X-Y antenna scanning can produce range-gated surface holograms from quadrature data. Multiple range gates can produce stacked-in-range holograms. Motion and vibration can be detected by changes in interference patterns within a range-gated zone. | 08-26-2010 |
20100214158 | RF magnitude sampler for holographic radar - A gated peak detector produces phase-independent, magnitude-only samples of an RF signal. Gate duration can span as few as two RF cycles or thousands of RF cycles. Response is linearly proportional to RF amplitude while being independent of RF phase and frequency. A quadrature implementation is disclosed. The RF magnitude sampler can finely resolve interferometric patterns produced by narrowband holographic pulse radar. | 08-26-2010 |
20100253570 | ANTENNA CALIBRATION - The present invention relates to antenna calibration for active phased array antennas. Specifically, the present invention relates to a built in apparatus for autonomous antenna calibration | 10-07-2010 |
20110037643 | Enhanced Impulse Response Measurement of an FM Radar Transmitter Pulse - An enhanced impulse response measurement for a pulsed frequency modulation (FM) radar signal provides a more accurate measurement of the amplitude of a secondary response relative to the amplitude of a main response. The pulsed FM radar signal is sampled to produce a time-domain sample record. The sample record is windowed to produce a windowed sample record. The windowed sample record is transformed into a frequency-domain spectrum. The spectrum is multiplied with the complex conjugate of a frequency-domain estimate of a transmitted pulsed FM radar signal to produce a de-spreaded pulse. The de-spreaded pulse is transformed into the time domain to produce a measurement of the impulse response having a main response and a secondary response. The amplitude of the secondary response is corrected to eliminate errors caused by the windowing. | 02-17-2011 |
20120139775 | Method for Testing GNSS-Based Positioning Systems in Obstructed Environments - Methods of testing GNSS-based positioning systems in obstructed environments may include specifying a required accuracy threshold for use in determining a reference trajectory. One or more difficult areas of relatively poor or missing GNSS availability may be located within the obstructed environment. Positioning information may be established for first reference points outside the difficult areas. Subsequently, by surveying with respect to the first reference points, positioning information may be established for second reference points within the difficult areas. The first and second reference points may then be used to determine a true path associated with the reference trajectory. When an improved GNSS-based positioning system is navigated along the reference trajectory, a set of measured points may be gathered, and errors between the true path and a measured path (derived from the measured points) may thereby be evaluated with respect to statistical characteristics, or to other improved GNSS-based positioning systems. | 06-07-2012 |
20120154205 | METHOD OF DETERMINING ADEQUACY AND ADEQUACY DETERMINING DEVICE - A method of determining adequacy of acquisition includes: attempting to acquire a satellite signal from a satellite and decoding first satellite orbit data; and determining the adequacy of acquisition of the satellite signal by using the first satellite orbit data and second satellite orbit data that has been acquired from the satellite. | 06-21-2012 |
20120162005 | APPARATUS AND METHOD FOR RAY-TRACING IN WIDEBAND GBYTE GBPS COMMUNICATION SYSTEM - A method for ray-tracing in a wideband Gbyte Gbps communication system includes deriving scattering distribution characteristics of reflected signals reflected on a reflection plane, analyzing amplitude distribution of the scattering distribution characteristics to distinguish a specular signal and a diffuse signal, and comparing signal amplitudes of the specular signal and the diffuse signal to calculate received power of the reflected signals according to a result of the comparing. | 06-28-2012 |
20120182177 | MIXER MONITORING - In a method for checking the functionality of a mixer, the mixer is supplied with a high-frequency signal and a high-frequency comparison signal in order to generate a baseband signal. The amplitude of the high-frequency signal is modified as a function of time. A direct-current voltage component of the baseband signal which is output by the mixer is analyzed to determine the functionality of the mixer. | 07-19-2012 |
20120229329 | METHOD AND SYSTEM FOR DETECTING RADAR SIGNALS - A method and system for detecting RADAR signals in a radio communications system is provided. A detection system includes a pulse examination. Based on the result from the examination/analysis, a RADAR pulse is detected. The examination/analysis may include a correlator for correlating received pulses with themselves or samples previously obtained. | 09-13-2012 |
20140035778 | METHOD OF MONITORING THE INTEGRITY OF RADIO-NAVIGATION STATIONS IN A SATELLITE BASED AUGMENTATION SYSTEM - A method of monitoring the integrity of stations for observing radio-navigation signals in a satellite based augmentation system SBAS comprises: defining a geographical zone comprising a plurality of observation stations, calculating, for each observation station of the said zone and for each line of sight between the said station and a satellite, the discrepancy between the theoretical pseudo-distance D and the measured pseudo-distance D′, calculating the average m of the said discrepancies D-D′ over the said zone for at least one satellite in visibility of the said zone, validating the integrity of at least one observation station of the said zone if the said discrepancy, for the said station and for at least one line of sight between the said station and a satellite, is less than or equal to the said average that is multiplied by a predetermined exclusion threshold, and excluding this observation station in the converse case. | 02-06-2014 |
20140091963 | APPARATUS AND METHOD FOR ANALYZING PROPAGATION OF ELECTROMAGNETIC WAVE IN RADIO WAVE SYSTEM - Disclosed are an apparatus and a method for analyzing propagation of an electromagnetic wave by effectively using a ray tracing scheme in a radio wave system, in which; an electromagnetic wave scattered in an electromagnetic wave incident to an interface in a service area is detected; average scattering power for the interface is calculated by the scattered electromagnetic wave; the propagation of the electromagnetic wave in the service area is analyzed based on the average scattering power. | 04-03-2014 |
20140218229 | ADVANCE MANUFACTURING MONITORING AND DIAGNOSTIC TOOL - A device and a method for monitoring and analysis utilize unintended electromagnetic emissions of electrically powered components, devices or systems. The emissions are received at the antenna and a receiver. A processor processes and measures change or changes in a signature of the unintended electromagnetic emissions. The measurement are analyzed to both record a baseline score for future measurements and to be used in determining status and/or health of the analyzed system or component. | 08-07-2014 |
20140300507 | RADAR PERFORMANCE MONITOR, PULSE-COMPRESSION RADAR APPARATUS, AND RADAR PERFORMANCE MEASURING METHOD - A radar performance monitor is provided. The monitor includes a receiver for receiving a transmission signal of which a temporal change of a frequency is non-linear, the transmission signal being transmitted from a radar unit of a pulse-compression radar apparatus, and a response signal generator for generating a response signal of which a temporal change of a frequency is linear and transmitting the response signal to the radar unit as a response to the transmission signal received by the receiver. | 10-09-2014 |
20140340254 | RADAR DEVICE AND A METHOD FOR DETECTING A MALFUNCTION OF A RECEIVER CHANNEL OF A RADAR DEVICE - A radar device for transmitting and receiving a signal in a frequency band for target detection. The invention includes a control means, an oscillator, with an input of the oscillator being connected via a converter to the control means, with it being able to address the oscillator via control means in order to generate a signal, and with it being possible to tap the signal generated via the oscillator at an output of the oscillator, at least one transmission antenna for transmitting the signals provided at the output of the oscillator, with the transmission antenna being connected to the output of the oscillator, and at least one receiver channel for receiving a receiver signal, for processing the receiver signal, and for forwarding the processed receiver signal to the control means, with the receiver channel comprising at least one receiving antenna for receiving the receiver signal and a mixer for mixing the receiver signal with the signal provided at the output of the oscillator, and with the mixer being connected to the output of the oscillator. | 11-20-2014 |
20140354468 | RADAR APPARATUS AND METHOD OF MEASURING RADAR PERFORMANCE - A radar apparatus is provided. The radar apparatus includes a transmitter configured to transmit radar signals via a radar antenna, a receiver configured to receive reflection waves that are echoes of the radar signals, via the radar antenna, a radar image generating module configured to generate a radar image based on the reflection waves received by the receiver, a performance monitor configured to measure performance of at least one of the transmitter and the receiver, and a controller configured to cause the performance monitor to perform the measurement while the transmission of the radar signals is suspended. | 12-04-2014 |
20150138012 | CHECKING METHOD AND SYSTEM FOR RADAR DEVICE - A first step sets a second inclination angle of a housing to an angle different from a reference housing angle by a limit angle; drives an actuator to set a first inclination angle to an angle different from a substrate inclination angle by the limit angle such that a beam axis is kept to be oriented to a specified direction; and measures, based on transmission and reception of a radar beam, first received power. A second step drives the actuator to set the first inclination angle to an angle located outside the adjustment range by a predetermined additional angle while the first inclination angle is maintained; and measures, based on transmission and reception of the radar beam, second received power. A third step determines whether a difference between the first received power and the second received power is greater than a predetermined determination threshold, and checks an operating state of the actuator based on a result of the determination. | 05-21-2015 |
20150301157 | METHOD FOR DETECTING INTERFERENCE IN A RECEIVED SIGNAL OF A RADAR SENSOR, DRIVER ASSISTANCE DEVICE AND MOTOR VEHICLE - The invention relates to a method for detecting interference in a received signal (s) received by a radar sensor ( | 10-22-2015 |
20150338508 | Determination of an indicator for a blindness of a radar sensor - A method for determining an indicator for a blindness of a radar sensor, includes: controlling the radar sensor to transmit a transmission signal in the form of at least two successive frequency ramps having the same ramp slope and in the same frequency range, and to receive detection signals associated with the frequency ramps; examining, for multiple frequencies, whether a ratio between the received powers in the frequency spectra of the received signals, at a respective frequency, corresponds to a ratio between the transmission powers of the associated frequency ramps; and determining an indicator for a blindness of the radar sensor based on the result of the examinations. | 11-26-2015 |
20150378010 | System And Method For Testing Frequency Synthesizer - A method of testing a frequency synthesizer over a predetermined frequency range using a delay unit complying with a spectral delay distribution model modeling a spectral delay distribution of the delay unit over the predetermined frequency range. The method comprises generating at least one test signal with the frequency synthesizer according to at least one test command; passing the at least one test signal through the delay unit so as to obtain at least one delayed test signal; measuring at least one shift of a signal attribute between the delayed test signal and the test signal; estimating an accuracy of the frequency synthesizer by comparing the at least one measured shift with an expected shift, the expected shift being derived from the spectral delay distribution model of the delay unit and from the at least one test command. | 12-31-2015 |
20160033624 | MEASURING DEVICE AND A MEASURING METHOD ESPECIALLY FOR THE MEASUREMENT OF FMCW SIGNALS - A measuring device for measuring a measurement signal of a device under test comprises a processing unit and a display unit. The processing unit comprises a detection unit configured to automatically determine at least one parameter characterizing the measurement signal. The processing unit further comprises a reconstruction unit configured to reconstruct an ideal measurement signal on the basis of the at least one parameter characterizing the measurement signal. The display unit is configured to display the measurement signal or a signal derived from the measurement signal and the reconstructed ideal measurement signal. | 02-04-2016 |
20160377702 | RADAR AXIS DISPLACEMENT AMOUNT CALCULATION DEVICE AND RADAR AXIS DISPLACEMENT CALCULATION METHOD - A processor generates first position information on a relative position between a camera and a radar, acquires, from the radar, second position information on a relative position between the radar and a reflector, the second position information being generated by using an arrival direction of the radar transmission wave, and calculates a displacement amount by comparing the first position information and the second position information with each other. | 12-29-2016 |
20190146059 | BUILT-IN SELF-TEST RADAR UNIT AND METHOD FOR PHASE SHIFT MEASUREMENT THEREIN | 05-16-2019 |