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8081105 |
Method for measuring the radial velocity of a target with a doppler radar
An embodiment of the invention includes a step of transmitting an OFDM waveform including several frequency carrier signals transmitted simultaneously, the frequency carrier signals being coded in...
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8018374 |
Radar
A radar having a high time and high spatial resolution and being capable of performing volume scanning with an inexpensive and simple structure, while enabling reduction is size and weight. A radar...
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7994966 |
Device for generation of microwaves
The invention relates to a device for generation of microwaves comprising a virtual cathode oscillator (1) in a coaxial embodiment with an outer cylindrical tube forming a cathode (2) and connected...
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7812760 |
Short-range radar and control method thereof
A transmitting unit of a short-range radar includes a first pulse generating unit, a second pulse generating unit, an oscillator and a switch, and while complying with the spectrum mask specified...
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7800529 |
Method and apparatus for creating and processing universal radar waveforms
A new approach to radar imaging is described herein, in which radar pulses are transmitted with an uneven sampling scheme and subsequently processed with novel algorithms to produce images of...
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RE41630 |
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....
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7783110 |
Semicoherent channel estimator
One embodiment is a system for processing a complex ambiguity function (CAF) comprising creating a CAF surface from incoming data and a model vector, wherein the CAF surface has at least one...
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7741989 |
Radar system, radar transmission signal generation method, program therefor and program recording medium
Disclosed is a radar system capable of detecting near targets even in case of using discrete bands transmission signal. For this end, a discrete bands selection unit 1 selects discrete bands that...
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7688257 |
Marine radar systems and methods
Marine radar systems and methods for producing low power, high resolution range profile estimates. Non-linear Frequency Modulation (NLFM) pulse compression pulses are frequency stepped to form a...
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7561100 |
Correlation processor for receiver
A correlation processor for a receiver is capable of carrying out a correlation process with highly suppressed side lobes, improved resolution, and minimized S/N loss. The correlation processor is...
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7535408 |
Apparatus and methods for detection of multiple targets within radar resolution cell
A method and apparatus is operative for multiple target detection in a radar system which employs a radar waveform of two or more frequency diverse subpulses. The apparatus adds coherent processing...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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;...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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)...
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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...
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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...
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5847677 |
Random number generator for jittered pulse repetition interval radar systems
A random number generator for generating a pseudo-random code for use with ittered pulse repetition interval radar systems has been disclosed in which the code generated by the random number...
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5831569 |
Method and apparatus for injecting synthetic pulses for increased transmitter stability
An apparatus and method for improving stability in a transmitter receiving a staggered pulse train includes maintaining a constant temperature of the transmitter at the start of each pulse of the...
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5777574 |
High resolution imaging radar linear frequency modulation bandwidth multiplier
An apparatus and method of linear frequency modulation waveform bandwidth multiplication including a digital linear frequency modulation waveform synthesizer for generating a synthesized waveform...
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5760736 |
Direct X-band waveform generator
X-band signals are generated from the output of a Josephson junction array which is excited by a first RF frequency waveform digitally implemented in a data stream generated by a digital waveform...
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5731784 |
Adaptive pulse shaping implementation and method for control of solid state transmitter spectrum and time sidelobes
A radar detection system includes a transmitter and a receiver. The transmitter generates a pulse including a first subpulse generated at a first predetermined frequency and a second subpulse...
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5726658 |
CDMA code generator employing mixing ergodic transformation
A codeword generator produces codewords in the form of digital electronic signals which may be employed, for example, in spread spectrum communications system or RADAR systems. The generator...
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5576713 |
Compensation circuit for improving modulation characteristic, and modulator and radar equipment using the same
A differential gain characteristic can be equivalently improved by providing a compensation circuit. The compensation circuit compensates a differential gain of a voltage-controlled oscillator, of...
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5563605 |
Precision digital pulse phase generator
A timing generator comprises a crystal oscillator connected to provide an output reference pulse. A resistor-capacitor combination is connected to provide a variable-delay output pulse from an...
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5552793 |
Self calibrated act pulse compression system
A self-calibrating pulse compression system which is able to optimally compress a chirped waveform notwithstanding variations in the chirped spectrum due to changes in transmitter characteristics...
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5495209 |
Switched-inverter modulator for producing modulated high voltage pulses
A switched-inverter modulator for use in driving a load that comprises master and slave high voltage power supplies for providing output pulses that directly drive the load. A synchronized pulse...
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5486833 |
Active signalling systems
A signalling system in time-frequency space for detecting targets in the presence of clutter and for penetrating media, includes a transmitter antenna system, receiver and processor system. The...
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5469479 |
Digital chirp synthesizer
A monolithic digital chirp synthesizer (DCS) chip using GaAs/AlGaAs HI2 L technology. The 6500 HBT gate DCS chip is capable of producing linear frequency modulated (chirp) waveforms or single...
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5448245 |
Signal processing apparatus in radar
The present invention relates to a signal processing apparatus for use in radars, which can detect a target from a receive signal by digital processing. An A-D converter samples the receive signal...
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5381154 |
Optimum matched illumination-reception radar for target classification
A bank of matched filters are employed to impose on a transmitted pulse, as well as the optimum matched filter receiver response, exact amplitude and phase modulations necessary to maximize the...
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5321409 |
Radar system utilizing chaotic coding
A radar system (20) has a chaotic code source (22) with a chaotic code output (23), which generates a chaotic code according to a chaotic difference equation. The radar system (20) further includes...
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