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| Number | Title | Issue Date |
| 7714772 | Transmit-receive FM-CW radar apparatus A transmit-receive FM-CW radar apparatus according to one mode of the invention comprises: a mixer for downconverting an IF signal; a switch provided on the input side of the mixer; and a switch controller for controlling the switch on and off in different modes and... | 05/11/2010 |
| 7432850 | Wideband radar The invention refers to a method and device for wideband radar, the method comprising: —generating a wideband signal (1, 6) with a bandwidth B; —copying the wideband signal (1, 6); —transmitting the wideband signal (6′); —receiving a r... | 10/07/2008 |
| 7423579 | Transmit-receive FM-CW radar apparatus A transmit-receive FM-CW radar apparatus according to one mode of the invention comprises: a mixer for downconverting an IF signal; a switch provided on the input side of the mixer; and a switch controller for controlling the switch on and off in different modes and... | 09/09/2008 |
| 7372396 | Transmit-receive FM-CW radar apparatus A transmit-receive FM-CW radar apparatus according to one mode of the invention comprises: a mixer for downconverting an IF signal; a switch provided on the input side of the mixer; and a switch controller for controlling the switch on and off in different modes and... | 05/13/2008 |
| 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 |
| 7165009 | Apparatus, method and articles of manufacture for velocity and bearing determination of an object A sensor front end is disclosed that is able to discriminate objects based on their range from the sensor and to derive bearing information therefrom. The sensor system includes a signal source for transmitting at least a first and a second sensor signal toward the ... | 01/16/2007 |
| 7126526 | Phased null radar A method for reducing the interference between a source transmitting pulses and equipments having nominal bandwidths which are outside the nominal bandwidth of the transmitted pulses, but which respond to sideband energy of the pulses. Phase perturbations are applie... | 10/24/2006 |
| 6972710 | Automotive radio wave radar and signal processing In an automotive radio wave radar, a center frequency of a transmitted wave is shifted at a certain cycle, and position information of an obstacle detected at three or more center frequencies is subjected to decision by majority to determine whether detection result... | 12/06/2005 |
| 6930631 | Sensor front-end with phase coding capability A sensor front end for an electronic radar sensor is disclosed that provides for a lower parts count while providing technical functionality by using multifunction parts, i.e., parts that are used both in transmitting and receiving. The sensor front end includes a c... | 08/16/2005 |
| 6911934 | Apparatus, method and articles of manufacture for sequential lobing high resolution radar A sensor front end that is able to discriminate objects based on their range from the sensor and to derive bearing information therefrom. The sensor system may include a signal source for generating source signal; an antenna system for transmitting the source signal... | 06/28/2005 |
| 6909668 | Ultrasonic displacement sensor using envelope detection An apparatus and method is provided for detecting motion or displacement of an object in a monitored zone. The apparatus is disposed between a load and a power source and comprises a transmitter for providing a pulsed signal within a monitored zone. The pulsed signa... | 06/21/2005 |
| 6788246 | In-vehicle pulse radar device An in-vehicle pulse radar device includes: an oscillator that generates an electromagnetic wave; a transmission amplifier that transmits the electromagnetic wave generated by the oscillator toward a target substance; an antenna that receives the reception electromag... | 09/07/2004 |
| 6480142 | Method and apparatus for measuring velocity and turbulence of atmospheric flows A method and apparatus for measuring the parameters of atmospheric turbulent flows utilizes the Doppler shifted frequencies of received radar signals backscattered from sound generated aerodynamically by atmospheric turbulent flows. Doppler frequency band... | 11/12/2002 |
| 6281833 | Range rate aiding in a pulsed radar system A timing and control method and apparatus (111) for performing precise range rate aiding includes a range gate delay means (114) for generating an estimate of the range gate delay (135) each pulse repetition interval as a function of the initial range (13... | 08/28/2001 |
| 6239736 | Range-gated radar motion detector A motion detector combines an FCC approved homodyne pulsed range-gated radar ("RGR") detector (10) and a PIR detector (158). Narrow microwave pulses are transmitted at a predetermined pulse repetition frequency ("PRF") and the pulses are reflected by a ta... | 05/29/2001 |
| 6232912 | Method for detecting a target by means of a high pulse repetition frequency radar system The invention particularly relates to the detection of fast-flying targets by means of an HPRF radar system that operates with a plurality of switchable pulse-repetition frequencies (PRFs). In the method, a high velocity resolution is attained, which perm... | 05/15/2001 |
| 6072424 | Method for measuring the ground speed of a vehicle by means of radar using reflection of electromagnetic waves from the driving surface A method for measuring the speed (V) of a vehicle (1) relative to the ground, of the type using the deviation in frequency associated with the Doppler effect between a transmitted wave (3) sent by radar (2) solidly connected to the vehicle and a reflected... | 06/06/2000 |
| 5977905 | Target detection method and device for wideband unambiguous pulse Doppler radar Coherent bursts of N wideband, low repetition frequency width-modulated pulses are transmitted, and they are received with pulse compression and then sampling. For each range gate and each speed hypothesis, a selection is made of the corresponding samples... | 11/02/1999 |
| 5781282 | Distance measurement device A distance measurement device is provided which determines the measurement zone of an object and also determines the direction of movement of the object within the measurement zone. The distance measurement device comprises distance measurement means for ... | 07/14/1998 |
| 5621397 | Electrical fault detecting device An apparatus for detecting illegal tampering with an electricity meter which is adapted to record the amount of electricity supplied to the meter through cables has a first signal generating sensing coil situated externally of, and upstream of, the meter ... | 04/15/1997 |
| 5508706 | Radar signal processor A radar system includes a radar transceiver for generating transmit signals and for receiving signals reflected by targets. The radar system includes a mixer for combining the transmit signals and the reflected signals into a mixer signal. A radar signal ... | 04/16/1996 |
| 5049887 | Target range detector with moving target indication An apparatus for determining a target position within a selected range segment includes a range gate generator which provides a range gate signal that enables a detector for a time interval corresponding to the range segment and a signal generator, respon... | 09/17/1991 |
| 4931799 | Short-range radar transceiver employing a FET oscillator A field effect transistor FMCW radar transceiver for short-range target detection, employs a varactor-tuned, gallium arsenide field effect transistor, voltage-controlled oscillator in the dual role of the transmitter signal source and the local oscillator... | 06/05/1990 |
| 4847622 | Coherent pulse radars A coherent pulse radar is activated successively according to at least two pulse repetition frequencies. These frequencies are of values such that (a) the received signal is ambiguous both with regard to distance and with regard to velocity, and (b) their... | 07/11/1989 |
| 4651153 | Low complexity digital processor for MX security radar The radar signal processor multiplies in real time samples from a radar system and coefficients representing desired frequency windows to be examined and integrates those products over a time period related to the particular frequency window in order to d... | 03/17/1987 |
| 4400700 | Doppler frequency analysis of radar signals A Doppler radar is adapted to respond only to walking human targets by prding means to detect the frequency modulation of the Doppler signals caused by the oscillatory body movements of such walking targets. A frequency locked loop frequency modulation d... | 08/23/1983 |
| 4382258 | Airborne frequency-modulation radar and its application to a missile homing head In an airborne frequency-modulation radar designed for the homing head of a guided missile, enhanced resolution both in distance and in velocity is obtained by making use of a solid-state transmitter in conjunction with a frequency-modulating oscillator a... | 05/03/1983 |
| 4219812 | Range-gated pulse doppler radar system A range-gated radar system which includes a phase modulator that modulates n r.f. generator with a signal which may be binary coded. In a preferred embodiment, the binary signal is a periodic signal of 2N -1 bits per period. Starting at some arb... | 08/26/1980 |
| 4210912 | Pulsed doppler moving target detector A pulsed doppler radar for detecting a moving target includes a plurality of antennae with patterns covering different spatial regions, wherein adjacent regions have overlapping spatial regions. Pulses having a predetermined carrier frequency are applied ... | 07/01/1980 |
| 4184154 | Range and angle determining Doppler radar A range, angle, and Doppler (velocity) measuring radar in which a CW, PRC radar floodlights a volume of interest. A receiving antenna in the form of a linear array generally broadside with respect to the bisector of the volume of interest is commutated (s... | 01/15/1980 |
| 4114152 | Pulse radar apparatus with integration device Pulse radar apparatus employs integration circuits following demodulator circuits to control the suppression of interference signals and prevent the display of interference on a PPI scope.... | 09/12/1978 |
| 4106019 | Range resolving doppler radar system A system for measuring unambiguous target range for targets at high velocities in which target range and doppler frequency data from three sequential transmission dwells of radar returns are stored, each dwell having a different pulse repetition frequency... | 08/08/1978 |
| 4078234 | Continuous wave correlation radar system A CW radar transmitter is simultaneously frequency modulated with a sinusal wave and phase-modulated with a pseudorandom binary code. Both the frequency of the FM signal and the bits and bit duration in the binary code can be varied to change the resolut... | 03/07/1978 |
| 4034373 | Airborne moving-target indicating radar system Radar detects relatively low velocity moving ground targets having relatively tiny radar cross sections, although the radar itself is moving at relatively high velocity with respect to ground. This is achieved with the use of spectrum tracking means and r... | 07/05/1977 |
| 4023170 | Charge transfer device range gate filter A charge transfer device comprising a time demultiplexer for separating in time, segments of a signal, such as a return radar video, and filtering the output from each time segment in order to a) reject zero doppler clutter or b) determine the frequency o... | 05/10/1977 |
| 4016567 | CCD range-doppler processor Signal processing wherein signals are processed using chirp-Z-transform (CZT) techniques and charge transfer device (CTD) transversal filters. The chirp weighting signal may be amplitude modulated to achieve signal apodization and may be generated by impu... | 04/05/1977 |
| 4003051 | Expanded range gate moving target indicator The range bin width of a range gated moving target indicator (RG-MTI) is expanded to decrease the sensed range resolution to that which is compatible with the displayable range resolution, without limitation by the pulse width of the transmitted radar pul... | 01/11/1977 |
| 4001826 | Range-gated moving target signal processor A range-gated doppler processor, adapted for cooperation with a non-coherent receiver of a pulsed energy system and comprising a plurality of switched R-C signal-storage (integrating) networks, each switched-on for a preselected interval corresponding to ... | 01/04/1977 |
| 3967284 | Radar apparatus for detecting a coherent Doppler signal in cluttered environments 1. Radar apparatus comprising means for generating a series of pulses of oscillation, scanning aerial means for transmitting said pulses as a beam narrow in azimuth in different directions sequentially, the repetition frequency of said pulses being suffic... | 06/29/1976 |
| 3942035 | Charge coupled device signal processing apparatus using chirp-Z-transform techniques Signal processing wherein signals are processed using chirp-Z-transform (CZT) techniques and charge transfer device (CTD) transversal filters. The chirp weighting signal may be amplitude modulated to achieve signal apodization and may be generated by impu... | 03/02/1976 |
