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Class 342/128 - With frequency modulation


Subclass of Class 342 - Communications: directive radio wave systems and devices (e.g., radar, radio navigation)
Definition: Subject matter including determining distance by using a
No. of patents: 303
Last issue date: 07/19/2011


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NumberTitleIssue Date
7982661Coherent frequency modulated continuous wave radar
A frequency modulated continuous wave (FMCW) radar is described. The radar includes a first discriminator for receiving a portion of the swept frequency signal generated by a frequency sweep generator and for producing a reference difference-frequency signal of freq...
07/19/2011
7834804Radar apparatus
A beat signal normalizing section in a correction control section normalizes a group of sampling data of an input beat signal in one processing group. A phase amount measuring section calculates an amount of phase change of each sampling data. A correction control v...
11/16/2010
7791530Time duplex apparatus and method for radar sensor front-ends
A radar system and method for determining the range and, optionally, the azimuth of a target, while maintaining a high transmitting duty factor is provided. A waveform generator is connected to an antenna aperture by a transmit-receive switch, and the waveform is tr...
09/07/2010
7460058Radar
A radar for detecting a target wherein a standard deviation of the amplitude of a beat signal from a transmission signal and a reception signal is determined for a predetermined period. A threshold is determined by adding a predetermined value to the standard deviat...
12/02/2008
7436350Combined aircraft TCAS/transponder with common antenna system
The present invention is a combined aircraft TCAS/Transponder with common antenna system and transmitter. Common TCAS/Transponder multi-monopole top and bottom antennas may be connected to a top and bottom antenna modules, the top and bottom antenna modules being el...
10/14/2008
7432849Frequency modulation radar apparatus for vehicle use background of the invention
A frequency modulation radar apparatus for vehicle use can suppress the influence of noise to avoid incorrect estimation due to noise thereby to provide a beat frequency with high accuracy and at high speed without increasing the frequency resolution of the beat fre...
10/07/2008
7427946Object sensing apparatus
While an FM-CW mode for sensing an object, in which a frequency of an electromagnetic wave transmitted from a transmission/reception antenna 6 is continuously modulated, and also, a CW mode for judging an abnormal condition, in which the frequency of the elec...
09/23/2008
7425917Radar for detecting the velocity of a target
A radar including a target measurement component, a differential velocity calculator and an overall velocity determination portion. The target measurement component transmits and receives an electromagnetic wave over a detection range repeatedly at measurement inter...
09/16/2008
7423579Transmit-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
7397420Timing adjustment method for radar, and radar apparatus having automatic timing adjusting function
On/off timing of an amplifier and timing of antenna selection are accurately adjusted. When adjusting the on/off timing of the amplifier, modulation of a transmit signal is stopped, and a switch is set so as not to select any one of the antennas, thereby totally ref...
07/08/2008
7391362Linear FM radar
A FM-CW radar system comprises a frequency modulated continuous wave digital generator that produces both in-phase (I) and quadrature-phase (Q) outputs to orthogonally oriented transmitter antennas. A linearly polarized beam is output from a switched antenna array t...
06/24/2008
7379013Detecting objects within a near-field of a frequency modulated continuous wave (FMCW) radar system
The present disclosure relates to a radar device and technique for detecting the presence of objects located in the near-field of a frequency modulated, continuous wave (FMCW) radar device. The technique includes transmitting and receiving a frequency modulated sign...
05/27/2008
7372396Transmit-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
7365676Sensor for transmitting and receiving electromagnetic signals
The invention relates to a sensor comprising a housing, inside of which a transmitting antenna array that transmits electromagnetic transmission signals in a radiation area and a receiving antenna array that receives received signals reflected by at least one object...
04/29/2008
7352320FM-CW radar
An FM-CW radar includes a transmitting section, a mixing section, an A/D conversion section, a storage unit, and a signal processing section. The transmitting section transmits a continuous wave frequency-modulated with a triangular wave. The mixing section mixes th...
04/01/2008
7339518FMCW radar device and method for detecting interference
An FMCW radar device executes a frequency analysis for a beat signal in a frequency increase interval and a frequency decrease interval, to obtain frequency components in a predetermined high frequency range exceeding a frequency range corresponding to a target dete...
03/04/2008
7336218Radar system with peak frequency analysis and window functions
A radar system in which a beat signal is generated by transmitting a transmission signal that is subjected to frequency modulation into a triangular wave and receiving a reflection signal from a target, the beat signal is sampled, and a window function is applied to...
02/26/2008
7333051Methods 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
7327440Distance measuring device
A distance measuring device is disclosed which can measure the distance to an object located within a known range. The device uses beam splitters and lenses to focus and direct energy reflected from an object onto at least two bi-sensors. The bi-sensors each have an...
02/05/2008
7327308Programmable 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
7324039Short-range automotive radar transceiver
Automotive vehicle including a radar transceiver each including a heterodyne active IMPATT multiplier module arranged to receive a signal from a VCO, a first balance mixer arranged to receive a signal from a VCO, a second balance mixer arranged to receive a signal f...
01/29/2008
7312742Computerized tomography using radar
Sensing characteristics of an object includes transmitting a stepped-frequency radar through an object and detecting, with multiple receiving structures, deflected portions of the radar signal. The detected portions are processed to generate processed data including...
12/25/2007
7295152Timing adjustment method for radar, and radar apparatus having automatic timing adjusting function
On/off timing of an amplifier and timing of antenna selection are accurately adjusted. When adjusting the on/off timing of the amplifier, modulation of a transmit signal is stopped, and a switch is set so as not to select any one of the antennas, thereby totally ref...
11/13/2007
7292166Analog/digital converter and program therefor
There is provided an analog-to-digital conversion apparatus that corrects digital data output from a plurality of analog-to-digital conversion units. The analog-to-digital conversion apparatus includes an interleaving unit operable to align the digital data respecti...
11/06/2007
7286078Radar system for motor vehicles
A radar system for motor vehicles, having an antenna, a first processor which is developed to transform signals supplied by the antenna via a primary signal path into a spectrum, and a second processor for the additional evaluation of the spectrum, wherein at least ...
10/23/2007
7283087Radar 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
7271761Distance calculating method and system
In a system, a frequency-modulating unit is configured to frequency-modulate a radar wave signal within a predetermined frequency modulation range from bottom to top so that a frequency of the frequency-modulated radar wave changes in time. The rate of frequency cha...
09/18/2007
7269207Method of symbol index selection in code division multiple access
A method and device for estimating a target chip index value in a code-division multiple access receiver. The receiver receives signals from a transmitter that uses a plurality of transmitted chips for data transmission through a plurality of multipath channels. As ...
09/11/2007
7259716Quadrature mixture LO suppression via DSW DAC noise dither
A Quadrature Error Corrected Digital Waveform Synthesizer (QECDWS) employs frequency dependent phase error corrections to, in effect, pre-distort the phase characteristic of the chirp to compensate for the frequency dependent phase nonlinearity of the RF and microwa...
08/21/2007
7248207System and method for sidelobe reduction using point spread function expansion
Systems and methods for detecting targets using pulse-compressed radar signals are disclosed. In one application, relatively small targets that are masked by the time-sidelobes of a larger target's return signal can be detected. The methods include a signal expansio...
07/24/2007
7242344Radar apparatus and radar signal processing method
A radar apparatus calculates distances or relative speeds of a target according to a plurality of formulae. An predicted distance calculation formula is obtained at the following observation from the distances or the relative speeds thus calculated. A determination ...
07/10/2007
7239266Radar 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
7221310Electric wave axis adjusting apparatus for radar mounted on vehicle
The present invention provides an electric wave axis adjusting apparatus for an on-vehicle radar capable of readily and precisely adjusting an electric wave axis only by making the scanning range and a detection range identical to each other and changing a scanning ...
05/22/2007
7221309FM-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
7218274System and method for detection and tracking of targets
System and method for detection and tracking of targets, which in a preferred embodiment is based on the use of fractional Fourier transformation of time-domain signals to compute projections of the auto and cross ambiguity functions along arbitrary line segments. T...
05/15/2007
7209073Method and device for determining the filling level of a medium in a container
The invention relates to a method for determining the filling level of a medium in a container. A mixer that has at least one mixer blade and a mixer frequency (fR) is disposed in the container. Measuring signals are emitted at a predetermined meas...
04/24/2007
7209074Temperature 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
7205932Method and apparatus for improved determination of range and angle of arrival utilizing a two tone CW radar
An improved system is provided for aiming a shotgun-based or other countermeasure system so as to be able to countermeasure incoming rockets or projectiles. In one embodiment a shotgun aimed and controlled by the subject system projects a pattern of pellets to inter...
04/17/2007
7196654Vehicle positioning and tracking radar system
A vehicle positioning and tracking radar system includes a rotating antenna with a pair of spatially separated transmit feeds for simultaneously transmitting a pair of frequency-modulated continuous-wave (FMCW) electromagnetic signals having a first polarisation and...
03/27/2007
7190305Radar apparatus
In a radar apparatus, a receiving antenna includes a plurality of antenna elements, each receiving, as a reception signal, radio waves emitted into space and reflected off a target object. An analog signal is obtained by downconverting and putting a bandwidth constr...
03/13/2007
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