Matches 1 - 50 out of 165 1 2 3 4 >


Match Document Document Title
8909217 Wireless internet radio system and method for a vehicle  
An apparatus for wirelessly connecting a smartphone to a remote FM radio system, for controlling playback of audio content delivered wirelessly to the smartphone via a wide area network, on the...
8866667 High sensitivity single antenna FMCW radar  
One embodiment is directed towards a FMCW radar having a single antenna. The radar includes a transmit path having a voltage controlled oscillator controlled by a phase-locked loop, and the...
RE42316 Systems and methods for self-test of a radar altimeter  
Systems and methods for testing a signal generated by a Direct Digital Synthesizer (DDS) in a radar altimeter. In an embodiment of the method, a voltage signal derived by comparing a fixed...
7893864 Radar apparatus and control method of the same  
A radar apparatus is provided. An antenna is configured to transmit a frequency-modulated transmission wave toward an object and receive a reception wave from the object. A mixer is configured to...
7714774 False lock filter for pulsed radar altimeters  
A false lock filter circuit for a pulsed altimeter is provided. The circuit includes a low pass filter having a relatively low bandwidth (LBW LPF), a low pass filter having a relatively high...
7701384 Antenna system for a micro air vehicle  
An antenna for a micro air vehicle (MAV) takes the form of a wrap-around antenna (e.g., wrapped around a portion of the MAV) that selectively emits radio signals in different directions depending...
7295151 Systems and methods for self-test of a radar altimeter  
Systems and methods for testing a signal generated by a Direct Digital Synthesizer (DDS) in a radar altimeter. In an embodiment of the method, a voltage signal derived by comparing a fixed...
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...
7248342 Three-dimension imaging lidar  
This invention is directed to a 3-dimensional imaging lidar, which utilizes modest power kHz rate lasers, array detectors, photon-counting multi-channel timing receivers, and dual wedge optical...
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,...
7161527 Navigation system  
A radar altimeter system with a closed-loop modulation for generating more accurate radar altimeter values. The present invention combines flight safety critical sensors into a common platform to...
6992614 Radar altimeter  
A radar altimeter is provided that includes a transmitter operable to generate a radio signal at a modulation frequency, and transmit the radio signal toward a ground surface for reflection...
6977611 FM-CW altimeter detector  
A receiver for detecting the presence of FM-CW signals emanating from a radio altimeter, and for determining the identity of the source. The received signals are amplified and applied both...
6897803 Radar altimeter with forward ranging capabilities  
A method for incorporating a forward ranging feature into a radar altimeter is described. The method comprises positioning an antenna of the altimeter such that a side lobe of a radar signal...
6812885 Radio altimeter test method and apparatus  
A method, apparatus and circuit for testing a radio altimeter is disclosed. During the test-mode operation of the altimeter, a signal processor controls a transmitter to generate a radio frequency...
6761064 Movement-detecting altimeter  
To provide a movement-detecting altimeter designed so as to be capable of avoiding excessive accumulation of errors. The movement-detecting altimeter has a movement dependent altitude updating...
6753806 Methods and apparatus to compensate for zero Doppler returns  
A method for simulating a Doppler signal under stationary conditions is described. The method includes sampling a radar return signal at an integer multiple of the return signal frequency plus a...
6750807 Radar altimeter with forward obstacle avoidance capabilities  
A radar altimeter is described which includes a transmitter for transmitting a radar signal, a receiver for receiving the reflected radar signal, and at least one antenna coupled to one or both of...
6744397 Systems and methods for target location  
A method of determining a target location from a vehicle is described. The method includes identifying the target utilizing a video system, determining an angular location vector to the target...
6731234 Radar anti-fade systems and methods  
A method for suppressing ground return radar fading in a radar altimeter is described. The method includes providing a radar gate width which corresponds to an area that is smaller than an antenna...
6486826 Arrangement for the precise distance measuring, in particular the filling level measuring  
An arrangement for the precise measuring of the distance with a FMCW radar device having a frequency-variable digitally-actuated oscillator to generate a transmitting frequency which can be tuned...
6476759 Method for the calibration of an FM/CW type radio altimeter, and radio altimeter designed for the implementation of this method  
A radio altimeter using a linear oscillator to transmit a saw-toothed signal comprises, in addition to this first oscillator, a second linear oscillator to transmit, in synchronism with the first...
6437730 Method for checking an fm/cw type radio altimeter, and radio altimeter designed for the implementation of this method  
A radio altimeter using a linear oscillator to send out a continuous wave that is frequency modulated linearly between two boundary values sends the antenna installation an incident signal,...
6426717 Single antenna FM radio altimeter operating in a continuous wave mode and an interrupted continuous wave mode  
A single antenna FM radio altimeter operates in continuous wave (CW) and interrupted continuous wave (ICW) modes to provide an altitude indication. An altimeter transmitter generates a constant FM...
6384770 Linearizing device for a frequency-modulation ramp and its application to a radio altimeter  
The invention relates to a device for the linearization of a frequency modulation ramp comprising a voltage controlled oscillator associated with a phase locked-loop. The device comprises a...
6255982 Method of characterization of an overflown ground from a FM/CW radio altimeter signal  
The invention proposes a novel method for using the signals provided by an airborne FM/CW radio altimeter, allowing to perform an analysis of the ground overflown by an aircraft for the purpose...
6255984 Sensor system  
FMCW doppler radar, in which a reference signal is generated from the transmit signal via a delay line and a mixer. A measuring signal which is received and mixed with the transmit signal is...
5999118 Method of spectral analysis, FM/CW type radio altimeter with digital processing  
A spectral analysis carried out on the beat signals obtained by the mixing of a transmission signal, the frequency of which is modulated in the form of recurrent sawteeth, with this same signal...
5963509 Method and device for distance measurement  
In a distance measurement to an object, the distance measurement operating according to the FMCW principle, a linear frequency-modulated signal is transmitted and mixed with the signal reflected...
5923283 Altimetric type measurement method for use on a satellite  
An altimetric type measurement method for use on a satellite transmits a pulse towards the surface of the sea and carries out frequency transformation on the return signal resulting from the...
5781148 Continuous wave radar altimeter  
A continuous wave radar altimeter comprises a memory (24, 26), means for storing in the memory in digital form an array of return signals representative of the variation of reflected amplitude...
5719581 Low-cost radio altimeter  
A relatively low-cost FMCW radio altimeter includes a voltage-controlled oscillator based upon a GaAs FET. The oscillator produces, for example, a 4.3 GHz microwave signal that is modulated with a...
5477226 Low cost radar altimeter with accuracy enhancement  
A low cost frequency modulated (FM) radar altimeter system with enhanced accuracy for continuously providing an altitude of a target, comprising a transmitter means for transmitting a carrier...
5442361 Microwave transceiver using a reflection pumped mixer  
A microwave transceiver using a reflection pumped mixer includes an electromagnetic signal generator, a subreflector, a reflector of electromagnetic signals from the subreflector, a mixer,...
5387917 Radar fuze  
A method and apparatus for determining an altitude for a radar fuze. The method includes the steps of receiving a return signal and transmitting a transmitted signal. The return signal and the...
5315258 Method and apparatus for determining the moisture content of a material  
In the method of the invention, a microwave signal is passed through a material whose moisture content is to be measured, the change in the velocity of the signal which has travelled through the...
5072223 Radar system for measuring the nearest distance to an object  
This radar system for measuring the nearest distance "h" comprises transmitting means (9, 7, 5) for transmitting towards an object a frequency-modulated wave, receiving means (15, 17) for...
5047778 FMCW radar range tracker and method  
A range tracking technique for producing a ground return signal in an FMCW radar system. The radar system produces an IF signal having frequencies within a range extent band, the IF signal...
5047779 Aircraft radar altimeter with multiple target tracking capability  
An aircraft radar altimeter includes a programmed microcontroller which permits effective simultaneous tracking of at least two targets such that, for example, both ground and obstacles on the...
5046010 Fixed-echo cancelling radio altimeter and method of operating same  
A low altitude radio altimeter of the FM/CW type which transmits a sawtooth frequency wave and has a transmitting and a receiving aerial. A beat frequency signal Fbt between the transmitted and...
5016016 Volume-scattered echo discrimination device for FM/CW range measuring radar and use in a radio altimeter  
The device comprises, in a control loop of the subtractive beat frequency fb between transmitted waves and waves received as an echo, a pursuit discriminator (11) establishing the frequency fb at...
5014063 Integrated altimeter and doppler velocity sensor arrangement  
A transmitter section of the arrangement includes an altimeter transmitter and a Doppler transmitter. The transmitters both provide frequency-modulated outputs. The altimeter transmitter is...
4973967 Radioaltimeter type of detector and a proximity fuse equipped with such a detector  
The invention relates to a radioaltimeter type detector comprising an oscillator-transmitter (10), a modulator (20) suitable for frequency modulating the oscillator-transmitter according to a...
4958161 Frequency-modulated continuous-wave radar altimeter system  
The radar system of the FM/CW type transmits a wave which has a virtually linear frequency, between two frequencies f1 and f2 and supplies a first beat signal (Fb1) between transmitted and...
4947354 Measuring apparatus for detecting the distance "H" to an object  
A measuring apparatus for detecting the distance h to an object transmits and receives returns of a linearly frequency-modulated wave obtained by means of an oscillator (5) and a signal generator...
4945360 Radar altimeter  
The present radar altimeter operates in accordance with the frequency modulated continuous wave principle in the C-band. The altimeter is constructed with microminiaturized integrated circuits and...
4912472 FM-CW radar apparatus  
The invention relates to an FM-CW radar apparatus where the frequency sweep duration (R) corresponding with the transmitted signal is increased to obtain a mixing signal which is operational in a...
4857935 RF circuit arrangement  
An input signal for a travelling wave or distributed amplifier having input and output transmission lines is supplied to one end (1) of the input line and an output signal is derived from one end...
4812035 AM-FM laser radar  
A laser radar system wherein a beam of continuous wave (CW) electromagnetic energy is generated with frequency modulation (FM) and amplitude modulation (AM) being imposed thereon to produce an...
4806935 Closed loop velocity/altitude sensor for FM-CW doppler radars  
A Doppler navigation system includes an altimeter section with increased accuracy resulting from closed loop operation of signal processing portions for reflected signals including phase shift...

Matches 1 - 50 out of 165 1 2 3 4 >