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| Number | Title | Issue Date |
| 8188911 | Low noise generator for frequency swept signals A signal generation system suitable for use in a radar system comprises a local oscillator (LO) and an intermediate frequency (IF) oscillator, wherein the IF oscillator is a Direct Digital Synthesizer (DDS), and the LO is a free running oscillator not itself locked ... | 05/29/2012 |
| 7994969 | OFDM frequency scanning radar A radar system is disclosed, which comprises an orthogonal frequency division multiplexing (OFDM) modem and a frequency scanning antenna. In transmit, the OFDM modem modulates radar waveforms and the frequency scanning antenna radiates the OFDM modulated radio frequ... | 08/09/2011 |
| 7990313 | Radar arrangement An FMCW radar has a variable frequency microwave signal source for outputting a microwave signal, a frequency divider, a phase-locked loop, a loop filter and a reference signal source. The frequency divider is connected between the output of the variable frequency m... | 08/02/2011 |
| 7952516 | System and method for coherent frequency switching in DDS architectures The present invention is directed to an integrated circuit device that includes a primary signal synthesizer configured to generate a free-running first digital frequency signal and at least one secondary signal synthesizer disposed in parallel with the primary sign... | 05/31/2011 |
| 7701386 | Universal frequency generation and scaling Generation of electromagnetic or other waves of any frequency, coherence, modulation, power, etc. and for scaling such waves in frequency by any factor. Generation is achieved by incorporating an available source of desired coherence, modulation and power properties... | 04/20/2010 |
| 7679549 | Waveform generation method, radar device, and oscillator for radar device It is possible to generate D/A conversion voltage in which an error generated by numeric irregularities of a D/A conversion element such as resistor constituting a D/A converter 11 is corrected. A waveform generation method characterized in that input data in... | 03/16/2010 |
| 7548195 | Waveform generation method, radar device, and oscillator for radar device It is possible to generate D/A conversion voltage in which an error generated by numeric irregularities of a D/A conversion element such as resistor constituting a D/A converter 11 is corrected. A waveform generation method characterized in that input data in... | 06/16/2009 |
| 7355484 | Oscillator and radar apparatus using the same An oscillator and a radar apparatus that includes a resonator electro-magnetically connected to a micro strip line and a rotor connected to the resonator by capacitance. The bottom surface of the rotor has a changing height in the circumferential direction of the ro... | 04/08/2008 |
| 7345619 | Generating event signals in a radar system A radar system having a transmit signal path and a receive signal path and an event generator which is responsive to command signals provided by a digital signal processor (DSP) is described. The DSP generates command signals and provides the command signals to the ... | 03/18/2008 |
| 7345803 | Optical modulator and optical modulating method In an optical modulation device (10) having an electrical/optical interaction region (11), an electrical signal line (3) is connected to an electrical signal input terminal (2a), another electrical signal line (4a) is... | 03/18/2008 |
| 7333051 | Methods and devices for determining the linearity of signals A method (for example, machine-implemented, e.g., via a receiver), for determining whether a transmitted pulsed-signal is a linear or non-linear frequency modulated (FM) signal, includes: iteratively determining upper and lower bound slopes associated with frequency... | 02/19/2008 |
| 7327308 | Programmable method and test device for generating target for FMCW radar A test device for a frequency modulated continuous wave (FMCW) radar is provided. The test device has a central control unit for monitoring the FMCW radar. When the FMCW radar transmits a frequency modulated continuous signal to search for a target, the central cont... | 02/05/2008 |
| 7283087 | Radar having a transmission oscillator which can be excited quasi-phase coherently by an evaluation oscillator A radar is provided with transmitting means for transmitting a signal and with receiving means for receiving a reflection of the transmitted signal. The inventive radar is characterized in that the transmitting means is provided with a transmitting oscillator and th... | 10/16/2007 |
| 7265712 | Method and apparatus for processing high time-bandwidth signals using a material with inhomogeneously broadened absorption spectrum Techniques for analog processing of high time-bandwidth-product (TBP) signals use a material with an inhomogeneously broadened absorption spectrum including multiple homogeneously broadened absorption lines. A first set of signals on optical carriers interact in the... | 09/04/2007 |
| 7239266 | Radar altimeter The present invention provides a radar altimeter system with a closed loop modulation for generating more accurate radar altimeter values. The system includes an antenna, a circulator, a receiver, and a transmitter. The circulator receives or sends a radar signal fr... | 07/03/2007 |
| 7236024 | Configurable circuit structure having reduced susceptibility to interference when using at least two such circuits to perform like functions A PLL function may be implemented as a dual-loop structure having a first PLL circuit which generates an intermediate signal from the reference signal, and a second PLL circuit which generates an output signal from the intermediate signal. The intermediate signal fr... | 06/26/2007 |
| 7224053 | Semiconductor device responsive to different levels of input and output signals and signal processing system using the same A semiconductor device which integrates a plurality of semiconductor chips into a single package includes a first semiconductor chip and a second semiconductor chip. The first semiconductor chip includes a plurality of first bonding pads outputting first signals hav... | 05/29/2007 |
| 7221309 | FM-CW radar system In an FM-CW radar system, a frequency modulating said modulating wave output from said modulating signal generator has a frequency variation skew with respect to a time axis (modulation skew), and the radar system includes a means for varying the modulation skew by ... | 05/22/2007 |
| 7209074 | Temperature compensation improvements in radar apparatus A radar-based distance measurement apparatus comprises a microwave circuit comprising a frequency generator which produces a microwave frequency signal, the frequency of which is modulated by an amount determined by a modulation signal applied to the frequency gener... | 04/24/2007 |
| 7209532 | Phase lock loop and method for coded waveforms A communication system from maintaining synchronization includes a communication signal comprising a carrier and a data signal that is sent from a transmitter to a receiver which includes a phase lock loop. The receiver compares the output of a Viterbi decoder with ... | 04/24/2007 |
| 7199751 | Radar equipment A radar equipment of the present invention amplifies a reception signal with feedback based on the delay amount obtained from the correlation detection result. Accordingly, it becomes possible to maintain the reception signal (demodulated signal) level to a proper l... | 04/03/2007 |
| 7187220 | Memory clock slowdown Circuits, methods, and apparatus for slowing clock circuits on a graphics processor integrated circuit in order to reduce power dissipation. An exemplary embodiment of the present invention provides a graphics processor having two memory clocks, specifically, a swit... | 03/06/2007 |
| 7095366 | High-frequency oscillation apparatus, radio apparatus, and radar A high-frequency oscillation apparatus wherein an oscillation signal output from a voltage controlled oscillator (VCO) is transferred through a transfer line to a resonator and the resonator is excited. The resonator is coupled with a second transfer line and an RF ... | 08/22/2006 |
| 7068216 | Method for the linearization of FMCW radar devices A method for the linearization of frequency modulated continuous wave (FMCW) radar devices having non-linear, ramp-shaped, modulated transmitter frequency progression x(t). With this invention, a correction phase term for compensation of the phase error in the recep... | 06/27/2006 |
| 7068118 | Pulse modulator for nonradiative dielectric waveguide, and millimeter wave transmitter/receiver using the same A pulse modulator includes a circulator which comprises: two ferrite plates; a plurality of mode suppressors for transmitting therethrough an LSM mode electromagnetic wave while shutting off an LSE mode electromagnetic wave; and an impedance matching member mounted ... | 06/27/2006 |
| 7049999 | Modulation circuit for a vehicular traffic surveillance Doppler radar system A modulation circuit for a traffic surveillance Doppler radar system is disclosed. In one embodiment, the modulation circuit is utilized in a vehicular traffic surveillance Doppler radar system that processes a reflected double-modulated FM signal to determine a tar... | 05/23/2006 |
| 7050000 | Radar based application programmable waveform generator component An exemplary radar system includes a waveform generator that generates a control waveform. An in-phase and quadrature modulator receives the control waveform from the waveform generator and in turn generates a waveform output that is amplified by a power amplifier b... | 05/23/2006 |
| 7002512 | FM-CW radar system which discriminates between signals related to a target object and signals not related to a target object In an FM-CW radar system, a frequency modulating wave output from said modulating signal generator has a frequency variation skew with respect to a time axis (modulation skew), and the radar system includes a means for varying the modulation skew by controlling the ... | 02/21/2006 |
| 7002511 | Millimeter wave pulsed radar system A millimeter wave pulsed radar system includes a radar synthesizer having a voltage controlled oscillator/phase locked loop (VCO/PLL) circuit, direct digital synthesizer (DDS) circuit and quadrature modulator circuit that are operative to generate an intermediate fr... | 02/21/2006 |
| 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 performing radar includes the steps of: transmitting a plurality of pulse... | 01/24/2006 |
| 6970030 | Dual phased-locked loop structure having configurable intermediate frequency and reduced susceptibility to interference A PLL function may be implemented as a dual-loop structure having a first PLL circuit which generates an intermediate signal from the reference signal, and a second PLL circuit which generates an output signal from the intermediate signal. The intermediate signal fr... | 11/29/2005 |
| 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 |
| 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 |
| 6909405 | Radar head module A radar head module includes a high-frequency circuit that sends and receives a radar beam for a radar, a case that covers the high-frequency circuit, and a mounting member for attaching the radar head module to an outside body on which the radar head is to be mount... | 06/21/2005 |
| 6859167 | Method for increasing the unambiguous distance in FSK radars A method used to increase the ambiguity distance of FSK radars implements a waveform made up of patterns consisting of frequency plateaux whose frequencies are alternately shifted by plus or minus a value Δf′. With this waveform, the method associates processing ... | 02/22/2005 |
| 6744402 | High-frequency diode oscillator and millimeter-wave transmitting/receiving apparatus An object of the present invention is to facilitate positioning of a metal member for mounting a high-frequency diode and of a dielectric strip, thereby remarkably improving control of oscillation characteristics and workability in production. The invention provides... | 06/01/2004 |
| 6707419 | Radar transmitter circuitry and techniques A radar transmitter includes a digital ramp generator circuit for generating a VCO control signal. The ramp generator includes a digital signal processor and a digital-to-analog converter. In one embodiment, the VCO output signal is up-converted to provide the trans... | 03/16/2004 |
| 6697011 | Doppler radar device A doppler radar device having comparing means 142 for comparing the level of pulse signal to be transmitted, sampled through a burst gate, with a predetermined threshold value and search means 143 for changing a set position of the gate, wherein a timing ... | 02/24/2004 |
| 6577270 | Radar transceiver A compact millimeter wave radar transceiver at low cost is provided wherein a direct current voltage applying circuit is coupled to a high frequency line to apply a fast pulse wave without losing a sharp input pulse pattern. A voltage is applied to a nega... | 06/10/2003 |
| 6366236 | Neural network radar processor A neural network radar processor (10) comprises a multilayer perceptron neural network (100.1) comprising an input layer (102), a second layer (122), and at least a third layer (124), wherein each layer has a plurality of nodes (108), and respective subse... | 04/02/2002 |
