Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 7408499 | Generations of sequences of waveforms A sequence of waveforms is generated by producing a primary symbol sequence and, for each symbol within the sequence, substituting a randomly-selected waveform. The primary symbol sequence has a narrow autocorrelation function, and may be a train of pulses, with the... | 08/05/2008 |
| 7365603 | FET amplifier, pulse modulation module, and radar device An FET amplifier includes an FET for amplifying a high-frequency signal to be input to the gate on the basis of a gate bias voltage from a gate bias control circuit. In the FET amplifier, a high-frequency signal input circuit and the output portion of an inverting a... | 04/29/2008 |
| 7362261 | Linear frequency-modulated pulse radar A linear frequency-modulated pulse radar system is provided in which the echo signal is mixed with a de-ramp signal, in order to reduce the bandwidth. The transmission signal of the pulse radar and the de-ramp signal are generated with the same reference oscillator,... | 04/22/2008 |
| 7358888 | 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 the perimeter of a building. Each TM-UWB radar transmits ultra wideban... | 04/15/2008 |
| 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 spectrum of the pulse signal is expanded without decorrelation occurrin... | 12/04/2007 |
| 7259713 | Ranging systems A continuous wave ranging system, comprising a modulator 2 for modulating an r.f. carrier wave in accordance with a pseudo random code, a transmitting antenna 5 for radiating the modulated signal towards a target, a receiving antenna 6 and recei... | 08/21/2007 |
| 7245599 | Application of complex codes to maximize user link utilization A method of increasing utilization of user link bandwidth for a code division multiple access communications system is disclosed that includes the steps of selecting a set of orthogonal complex codes each having a code length that is greater than a code length of an... | 07/17/2007 |
| 7236124 | Radar system and method for reducing clutter in a high-clutter environment A radar system transmits an environment-sensing pulse and processing circuitry time-reverses an order of radar return samples and generates a convolution matrix from the radar return samples resulting from a transmission of the environment-sensing pulse. The process... | 06/26/2007 |
| 7236508 | Application of complex codes to maximize feeder link utilization A method of increasing utilization of user link bandwidth for a code division multiple access communications system is disclosed that includes the steps of selecting a set of orthogonal complex codes each having a code length that is greater than a code length of an... | 06/26/2007 |
| 7212154 | Apparatus for producing an amplified radio frequency pulse Apparatus for producing an amplified Radio Frequency pulse includes a controller for monitoring the output amplified pulse and determining therefrom a correction for a deviation in the characteristics. The correction is applied by a phase shifter or amplitude contro... | 05/01/2007 |
| 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 differential trigger is applied to a differential base band pulse generator hav... | 04/03/2007 |
| 7197062 | Method and apparatus to detect and decode information Briefly, in accordance with an embodiment of the invention, a method and apparatus to detect and decode information is provided, wherein the method includes sampling a radio frequency (RF) impulse signal to generate a sample signal and storing the sample signal for ... | 03/27/2007 |
| 7196658 | Waveform generation method, waveform generation program, waveform generation circuit and radar device A conventional waveform generation circuit was required to increase a number of bits or a sampling rate for a D/A converter to enhance a precision of waveform shaping, and had a problem that a cost was increased. Therefore, as a method for enhancing the precision of... | 03/27/2007 |
| 7170408 | System and method for information assimilation and functionality control based on positioning information obtained by impulse radio means A system and method for information assimilation and functionality control based on positioning information obtained by impulse radio techniques, which utilizes the position information and communication abilities inherent in impulse radio technology to correlate po... | 01/30/2007 |
| 7158077 | Radar device and method for suppressing interference with a radar device A radar device is described having an arrangement to generate a carrier signal having a carrier frequency fT, an arrangement to generate pulses having a pulse repetition rate fPW, an arrangement to split the carrier signal between a transmissio... | 01/02/2007 |
| 7151483 | System and method for concurrent operation of multiple radar or active sonar systems on a common frequency A system and corresponding method for the concurrent operation of multiple radar systems on a common frequency and in the same geographical area includes a waveform generator that specifies certain operating parameters for the transmitted radar pulses. In a first in... | 12/19/2006 |
| 7151484 | Pulse compression processor A pulse compression processor 20 compressing a modulated pulse signal correlately received by a receiver, includes a coefficient calculator 30 calculating a set of filtering coefficients for converting sampled output signal values outside a vicinity of... | 12/19/2006 |
| 7106250 | Robust predictive deconvolution system and method A method for processing a received, modulated pulse (i.e. waveform) that requires predictive deconvolution to resolve a scatterer from noise and other scatterers includes receiving a return signal; obtaining L+(2M−1)(N−1) samples y of the return signal, where y(... | 09/12/2006 |
| 7064705 | Method of and apparatus for increasing the peak output pulse power delivered by capacitor-driven high-power diode and square-loop saturable reactor pulse compression generators with the aid of minority carrier sweep-out circuits within the pulse compression circuit A technique and apparatus for increasing the peak output pulse power of a capacitor driven high-power diode and square-loop saturable reactor pulse compression generator or transmitter (such as a Loran-C transmitter or other high power pulse generator) with the aid ... | 06/20/2006 |
| 7019686 | RF channel calibration for non-linear FM waveforms A system, method, and computer program product that performs self-calibration of pulse-compression radar signals. The system includes an antenna, a receiver, a transmitter, and a radar signal processor. Under normal (non-calibration) operation the radar transmitter ... | 03/28/2006 |
| 6965341 | High resolution SAR processing using stepped-frequency chirp waveform A stepped-frequency chirped waveform improves SAR groundmapping for the following reasons. Range resolution in SAR image is inversely proportional to the transmitted signal bandwidth in nominal SAR systems. Since there is a limit in the transmitted bandwidth that ca... | 11/15/2005 |
| 6959031 | Method and system for fast acquisition of pulsed signals A method and system for fast acquisition of pulsed radio signals where said signals comprised uniquely-spaced pulses or symbols. The receiver searches for and detects two ore more symbols, determines the interval or intervals between the symbols, and because the int... | 10/25/2005 |
| 6940450 | Robust predictive deconvolution system and method A method for processing a received, modulated pulse (i.e. waveform) that requires predictive deconvolution to resolve a scatterer from noise and other scatterers includes receiving a return signal; obtaining L+(2M−1)(N−1) samples y of the return signal, where y(... | 09/06/2005 |
| 6933880 | Programmable source of pulse trains on intermediate frequency and IFF emitting assembly using it The invention relates to a pulse-modulated source with adjustable parameters and to its use in an IFF or secondary radar emitting assembly. The architecture of currently used IFF emitting assemblies is such that there is a limit to the possible reduction in the spac... | 08/23/2005 |
| 6920188 | Method and apparatus for processing a multiple-component wide dynamic range signal An apparatus is provided for processing a wide dynamic range analog signal which comprises multiple components such as a signal with an in-phase component and a quadrature-phase component in for example separate I and Q data channels, wherein each channel has a dyna... | 07/19/2005 |
| 6914556 | Method and apparatus for magnetron coherence A pulsed magnetron is caused to emit a series of RF energy pulses which are phase coherent with an injection signal by supplying the magnetron with a pedestal pulse during low-power signal injection. The pedestal being of a magnitude and duration such that the slow-... | 07/05/2005 |
| 6799141 | Method for determining the channel gain between emitters and receivers A method for determining the channel gain between one or more emitter(s) and one or more receiver(s) by using a linear transform, such as a wavelet transform. Provides a fast and robust method for determining the channel gain, the signal being emitted with a very lo... | 09/28/2004 |
| 6750809 | High resolution SAR processing using stepped frequency chirp waveform A radar system has improved range resolution from linear frequency modulated (LFM) first sub-pulse and second sub-pulse, both having linear frequency modulation about different center frequencies. The first transmitted sub-pulse and the second transmitted sub-pulse ... | 06/15/2004 |
| 6700532 | Magnetron drive circuit The invention provides a magnetron drive circuit which drives a magnetron to produce a generally rectangular-shaped narrow transmission pulse having sharply shaped rising and falling edges. The magnetron drive circuit includes a nonlinear load circuit and... | 03/02/2004 |
| 6563450 | Shipboard point defense system and elements therefor A combined defense and navigational system on a naval vessel is disclosed. The disclosed system includes a track-while-scan pulse radar which is controlled to provide either navigational information or tracking information on selected targets. Additionall... | 05/13/2003 |
| 6502043 | Process and device for reducing the spectral line noise inside an aircraft, especially a rotating-wing aircraft, in particular a helicopter Process and device for reducing the spectral line noise inside an aircraft, especially a rotating-wing aircraft, in particular a helicopter. Said device (1) comprises sensors (Ca, Cb) for measuring the values of vibratory and/or acoustic parameters, controllab... | 12/31/2002 |
| 6420992 | On board jammer A method and apparatus for jamming radar and other electromagnetic signals is disclosed in which the jammer includes a single port, keyed primed oscillator which is primed with the low level signal received at its antenna. In one embodiment the priming si... | 07/16/2002 |
| 6388609 | Radar devices for low power applications and bathroom fixtures A fluid flow device includes an actuator, an RF transmitter, a gated RF receiver, and a processor. The RF transmitter is configured and arranged to produce a plurality of pulses of RF energy spaced apart in time to form a sensor field. The gated RF receiv... | 05/14/2002 |
| 6184817 | Master frequency generator A system is provided for generating multiple frequencies in a specified frequency band, with a specified step size between frequencies, in which the spectral purity of the frequencies is assured. The switching speed between frequencies is very fast, limit... | 02/06/2001 |
| 6081226 | Multi-mode radar exciter A radar exciter including a direct digital synthesis (DDS) wideband waveform generator which performs the frequency synthesis function heretofore performed by a direct analog synthesizer. This is achieved by deriving the DDS frequencies, the exciter RF fr... | 06/27/2000 |
| 6067043 | Pulse compression radar The invention concerns a method of synthesizing a replica used in the compression filter of pulse compression radar. The replica is calculated from the spectrum of a required impulse response. The required impulse response is preferably obtained from an analytical ... | 05/23/2000 |
| 6020843 | Technique for implementing very large pulse compression biphase codes A processing method for use in providing improved SAR imagery at high duty factors that provides for enhanced radar sensitivity. Radar signals are transmitted that embody a high duty factor ultra-high resolution SAR waveform generated using a biphase code... | 02/01/2000 |
| 5945941 | Pulsed radar apparatus and method employing power distribution system having reduced cost and weight and enhanced efficiency and reliability A power distribution system (12) is provided in radar apparatus to distribute power from a 270 VDC source (60) through an intermediate power converter (70) and very high frequency (VHF) regulator/modulator units (80). Bus conductors (71,74) interconnect t... | 08/31/1999 |
| 5920282 | Digitally-controlled pulse shaper for pulsed radar systems and radar wind profilers A digitally-controlled pulse shaper (DCPS) is provided which precisely controls the shape of the leading and trailing edges of a transmit pulse in a radar wind profiler, or pulsed-radar. In the case of pulse coding, where phase transitions are used to seg... | 07/06/1999 |
| 5854604 | High-power waveform generator A method and apparatus for generating a low phase noise RF signal where the output from a low phase-noise stabilized local oscillator operating at relatively high frequencies in the GHz range is combined in a power combiner with a digital data stream gene... | 12/29/1998 |
