Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8174435 | Methods and apparatus for non-isotropic sea clutter modeling Methods and apparatus to provide computing, using a processor, sea clutter threshold bias values as a function of range and azimuth, receiving a first shape corresponding to a first region of sea clutter about a radar, combining the sea clutter threshold bias values... | 05/08/2012 |
| 8169361 | Electronically scanned radar system A sampled beat signal RD is split into a plurality of short-time data SD in the time direction, for each of antenna elements. Interference component frequency of an interference wave is detected from a frequency spectrum of the short-time data SD. A digital beam for... | 05/01/2012 |
| 8164512 | Gaussian model adaptive processing in the time domain Embodiments of the present invention provide a Gaussian adaptive filter for ground clutter filtering and signal parameter estimation for weather radars in the time domain. In some embodiments, the filtering can be applied to dual polarization radar systems. In some ... | 04/24/2012 |
| 8159388 | Method for filtering sea clutter in a radar echo using a hydrographic model There is disclosed a method for filtering sea clutter in a radar echo using a hydrographic model. The method comprises the steps of determining parameter values of the hydrographic model using the radar echo, estimating the sea clutter corresponding to the sea surfa... | 04/17/2012 |
| 8144050 | Removing clutter from radar cross section measurements using spectral tagging A system for performing radar cross section measurements of a target may include a radar system and an antenna associated with the radar system to transmit signals and to receive reflected signals from the target and a clutter source. An EM tagging device is locatab... | 03/27/2012 |
| 8125375 | Radar A radar that detects the presence or absence of interference when detecting a target based on a frequency spectrum of a beat signal of a transmission signal and a reception signal. Whether or not the number of peaks exceeding a noise threshold in the frequency spect... | 02/28/2012 |
| 8059026 | Interference avoiding transform domain radar An ultra-wideband pulse Doppler radar employing a transform domain communication system class of output waveform, a waveform additionally modified for enhanced radar usage. The achieved waveform includes sequential radar output pulse discrimination, improved pulse r... | 11/15/2011 |
| 8013782 | Method, use of said method and arrangements in an electronic support measures system A method and arrangement for processing signals emitted by a plurality of apparent emitters that is detected by an Electronic Measures System/Direction Finder unit (ESM1). The ESM1 unit is adapted to identify a real emitter and at least one fal... | 09/06/2011 |
| 7990311 | Adaptive clutter filter for maritime surface search radar A time sequence of raw radar data for a region of space is subdivided into a plurality of processing frames. The processing frames are subdivided into a plurality of processing cells and iteratively processed by selecting a single processing cell for processing, tra... | 08/02/2011 |
| 7924218 | System for enhanced detection of a target A method for discrimination of a target from clutter, comprising: providing phase-range data associated with a return pulse of a radar device and second phase-range data associated with a subsequent return pulse; comparing the phase-range data and the second phase-r... | 04/12/2011 |
| 7916067 | Removing clutter from radar cross section measurements using spectral tagging A system for performing radar cross section measurements of a target may include a radar system and an antenna associated with the radar system to transmit signals and to receive reflected signals from the target and a clutter source. An EM tagging device is locatab... | 03/29/2011 |
| 7852259 | Clutter filtering Clutter filtering of broadband radar signals is performed by obtaining a measure of the impedance of an echo target. A distance resolution is selected and then a power spectrum is calculated for the necessary transmitting signal. Further a target area profile ρ(τ)... | 12/14/2010 |
| 7773029 | System and method for filtering clutter A system and method for filtering clutter is contemplated that in one aspect performs clutter-filtering on complex-voltages. In one aspect, spectral coefficients identified from a series of spectral coefficients as having been affected by clutter are replaced by a r... | 08/10/2010 |
| 7760133 | Radar apparatus enabling simplified suppression of interference signal components which result from reception of directly transmitted radar waves from another radar apparatus In a FM-CW or CW radar apparatus, when interference components are contained in channel signals obtained as beat signals from array antenna elements of respective channels, and the interference components result from directly receiving transmitted CW radar waves fro... | 07/20/2010 |
| 7728765 | Method and apparatus for clutter filtering staggered pulse repetition time signals A method for clutter filtering staggered pulse repetition time data signals is provided. The method comprises the steps of receiving a plurality of staggered pulse repetition time data signals. The data signals may comprise one or more desired signals and one or mor... | 06/01/2010 |
| 7728764 | Sidelobe blanking characterizer system and method According to a particular embodiment, a method for evaluating different antenna designs includes receiving different sets of antenna patterns representative of the different antenna designs from a corresponding number of data sources. The different sets of antenna p... | 06/01/2010 |
| 7683827 | System and method for reducing the effect of a radar interference signal A system and method are provided to reduce the effect of an interfering signal in a radar return signal for a frequency modulated continuous wave (FMCW) radar. Once the interfering signal is detected, an extent of the interfering signal is determined and the data th... | 03/23/2010 |
| 7683826 | Method of electromagnetic coupling between a radar in the L band and radionavigation equipment item and autoprotection and radionavigation device A device and a method for eliminating interference between a radar working on the L frequency band and an aeronautical radio navigation equipment item, such as DME (Distance Measurement Equipment). When the radio navigation equipment operates, the radar emits period... | 03/23/2010 |
| 7675458 | Dual beam radar system Various embodiments are described herein relating to a radar system and associated methods for detecting targets in the presence of certain types of clutter. The radar system generally comprises hardware operatively configured to obtain first and second sets of rada... | 03/09/2010 |
| 7675459 | Equivalent time sampling radar A dither clock generating section 1 generates a dither clock. A transmission pulse generating section 2a generates a transmission pulse emitted to the outside from a transmitting antenna 2c on the basis of the dither clock. A sampl... | 03/09/2010 |
| 7602331 | Computationally efficient adaptive radar pulse compression system One aspect of this disclosure relates to a method for processing a received, modulated radar pulse to resolve a radar target from noise or other targets. According to an embodiment of the method, a radar return signal is received and samples of the radar return sign... | 10/13/2009 |
| 7548187 | Adaptive clutter filtering to improve high sub-clutter visibility radar detection performance In an aircraft-mounted Doppler radar clutter rejection system, a flexible, sharp band pass filter uses Taylor weighting, an FFT and a module for selecting which of the Doppler cells are to be activated, thus to control the band pass characteristic and set the clutte... | 06/16/2009 |
| 7538717 | Adaptive ground clutter cancellation The present invention refers to an airborne radar device (1) comprising at least two antennas (2, 3) and clutter suppressing means (4). The radar device is arranged, via the antennas (2, 3) to send out radar pulses focused in main lobes (... | 05/26/2009 |
| 7535409 | Imaging radar method and system A time-reversal imaging radar system for acquiring an image of a remote target includes an antenna array having a plurality of spaced-apart antennas, and a transceiver coupled to the antenna array for alternately transmitting a radar signal via the antenna array tow... | 05/19/2009 |
| 7492312 | Multiplicative mismatched filters for optimum range sidelobe suppression in barker code reception Very efficient sidelobe suppression of Barker codes is achieved through the use of a mismatched filter, which is comprised of a conventional matched filter cascaded with a computationally efficient filter based on multiplicative expansion. Several constant parameter... | 02/17/2009 |
| 7474257 | Multistatic adaptive pulse compression method and system A radar receiver system includes a receiver, a processor, and a detector. The processor is programmed with a Multistatic Adaptive Pulse Compression (MAPC) algorithm for estimating adaptively a pulse compression filter, for each range cell of a plurality of range cel... | 01/06/2009 |
| 7474258 | System and method for detection and discrimination of targets in the presence of interference Systems and method of detection and discrimination of targets in the presence of interference are disclosed. A system transmits a signal and then receives signals including interference and reflections of transmitted signals. The system processes the received signal... | 01/06/2009 |
| 7460059 | Removing interfering clutter associated with radar pulses that an airborne radar receives from a radar transponder Interfering clutter in radar pulses received by an airborne radar system from a radar transponder can be suppressed by developing a representation of the incoming echo-voltage time-series that permits the clutter associated with predetermined parts of the time-serie... | 12/02/2008 |
| 7450056 | Search/detection apparatus The search/detection apparatus modulates a carrier signal by a modulation signal, generates a probe signal for detecting the location of a target, and receives the probe signal reflected by the target as an echo signal. Then, the search/detection apparatus detects t... | 11/11/2008 |
| 7439906 | Doppler-compensated radar pulse compression processing system and method A radar receiver system includes a receiver, a processor including a Doppler Compensated Adaptive Pulse Compressor (DCAPC) algorithm, possible other intermediate processing and a target detector. The DCAPC algorithm processes samples of a radar return signal, applie... | 10/21/2008 |
| 7439903 | Method of preventing interference between radars and radar system having interference preventing function A radar system mounted on a vehicle includes a first radar and a second radar, each having a transmitter-receiver and a signal processor. The transmitter-receiver transmits radar waves to detect objects such as another vehicle or other obstacles. An operating cycle ... | 10/21/2008 |
| 7436348 | Interferometer-type radar A transmitter for transmitting signals to targets and a receiver having a large-diameter array antenna for receiving signals reflected from targets are included. The transmitter has a function of outputting an FMCW signal for detecting direction and velocity of the ... | 10/14/2008 |
| 7436352 | Radar protection device for wireless networks A method for radar protection. The method includes recording energy events and calculating differences in recorded energy events to determine pulses. The method further includes sorting intervals between pulses into histogram bins, each bin representing a range of t... | 10/14/2008 |
| 7427948 | Combining signals exhibiting multiple types of diversity Combining signals includes receiving first signals having a first frequency and second signals having a second frequency. A first weight reflecting a signal-to-noise ratio associated with a first signal is determined for each first signal, and a first signal output ... | 09/23/2008 |
| 7423581 | Radar and similar apparatus A radar device is provided that can reliably display sensed image data of an object, regardless of the state of the object (echo) within a sensed range and of the surrounding environment. A behavior data detector 11 generates current level detection data by d... | 09/09/2008 |
| 7424269 | System, method and device of radar detection Embodiments of the present invention provide a method, apparatus and system of radar detection. The method, according to some demonstrative embodiments of the invention, may include comparing an energy level of signals received over a wireless communication channel ... | 09/09/2008 |
| 7424405 | Method and arrangement for signal processing comprising first and second pulse compression filters The invention refers to a method and an arrangement for signal processing for a target detecting device (1) where a return signal (8) is divided into two parallel branches where a first compression filter (15) compresses the signal in the first ... | 09/09/2008 |
| 7417579 | Weather radar with significance determination A weather radar system includes processing electronics. The processing electronics sense weather and determine significant weather based upon the altitude of the weather. The altitude of the weather can be compared to a flight path to determine its significance. A d... | 08/26/2008 |
| 7414572 | Method and apparatus for signal detection A method and apparatus for signal detection is provided herein. During operation logic circuitry will determine if a de-sensing signal exists within any received signal and, if a de-sensing signal exists, then it will be assumed that a radar pattern exists where the... | 08/19/2008 |
| H2222 | Normalized matched filter—a low rank approach This invention addresses the problem of radar target detection in severely heterogeneous clutter environments. Specifically, we present the performance of the normalized matched filter test in a background of disturbance consisting of clutter having a covariance mat... | 08/05/2008 |
