Abstract: The present invention relates to a system and a method for correcting position information of a surrounding vehicle, which provide accurate position information of a surrounding vehicle by correcting the position information of the surrounding vehicle received through vehicle-to-vehicle communication, and identifies a license-plate number of a front vehicle through a sensor mounted in a vehicle, calculates a position of the front vehicle, and compare position information, which is included in information including the identified number of the front vehicle in information received from the surrounding vehicle, with the calculated position of the front vehicle to correct the position information of the surrounding vehicle.

Abstract: The moving object recognition system includes: a camera that is installed in a vehicle and captures continuous single-view images; a moving object detecting unit that detects a moving object from the images captured by the camera; a relative approach angle estimating unit that estimates the relative approach angle of the moving object detected by the moving object detecting unit with respect to the camera; a collision risk calculating unit that calculates the risk of the moving object colliding with the vehicle, based on the relationship between the relative approach angle and the moving object direction from the camera toward the moving object; and a reporting unit that reports a danger to the driver of the vehicle in accordance with the risk calculated by the collision risk calculating unit.

Abstract: Various implementations described herein are directed to an apparatus having a transmit signal generator for a pulse compression radar. The transmit signal generator may include a frequency modulation stage with phase-lock-loop (PLL) circuitry configured to generate a transmit signal at antenna frequency. The transmit signal generator may include an amplitude modulation stage configured to shape an amplitude of the generated transmit signal.

Abstract: The invention relates to a detection device (1) for a motor vehicle (VI) comprising at least one optical detector (3). Said at least one optical detector (3) being configured for detecting the approach of a person (U) in a predefined area in the vicinity of the vehicle in order to activate opening command means of a device for opening a movable panel (5, 7) of the vehicle (VI). According to the invention: —said detection device (1) comprises switching means for switching the function of the at least one optical detector (3) to a detecting function of an obstacle (V2) at a predefined distance of the vehicle (VI) when the identifier of an authorized person (U) is detected inside the vehicle (VI) and the vehicle movable panels (5, 7) are closed, and wherein—said detection device (1) comprises processing means configured to react depending on a detection of an obstacle (V2) by the optical sensor (3).

Abstract: A radar apparatus is provided to receive a transmission wave reflected by a target object by antennas. The radar apparatus includes a signal analysis unit to analyze reception waves, and to obtain amplitudes and phases of the reception waves, at a frequency with which reception strength shows a peak. The radar apparatus also includes a direction detection unit to detect a direction of the target object based on the phases of the reception waves, and an estimated amplitude and phase output unit to output estimated amplitudes and estimated phases of reception waves to be received, assuming that the target object exists in the detected direction. The radar apparatus further includes a comparison unit to compare the amplitude or phase obtained by the signal analysis unit with that output by the estimated amplitude and phase output unit.

Abstract: A frequency modulated continuous wave (FMCW) radar system that includes a transceiver coupled to an analog to digital converter (ADC), and a digital signal processor (DSP) coupled to the ADC. The transceiver is configured to transmit a plurality of FMCW chirps, receive a plurality of reflected FMCW chirps, and mix the reflected FMCW chirps with at least one of the FMCW chirps to generate a plurality of beat signals. The reflected FMCW chirps are the FMCW chirps after being reflected off of a target object. The ADC is configured to convert the beat signals into a plurality of digital chirps. The DSP is configured to receive the digital chirps and quantify a relative velocity of the target object as compared to a velocity of the FMCW radar system by removing an effect of a range to the target object from a two dimensional range Doppler processing signal.

Abstract: A system includes one or more processors, and data storage configured to store instructions that, when executed by the one or more processors, cause the system to perform functions. In this example, the functions include receiving sensor data that is collected by one or more sensors of a device over one or more locations and over a time period. Further, in the present example, the functions also include determining location estimates of the device by performing filtering of the sensor data to determine offsets for a least one sensor providing sensor data. The filtering is an iterative process of filtering control input data to determine the sensor bias based on data from a second sensor of the at least two sensors and adjusting the set of sensor data based on the determined bias.

Abstract: In one embodiment, a towed implement proximity system, the system comprising: a first device comprising a transceiver, the first device configured to: transmit a signal; receive a first signal at a first angle and a second signal at a second angle responsive to the transmitted signal, the first and second signals comprising first information and second information, respectively, the first and second information each corresponding to respective positional information; and a controller coupled to the first device, the controller configured to determine a relative position in three axes between a first machine and a second machine based on the first and second information.

Abstract: An antenna array, particularly for a radar system, having first antenna elements which are situated in a horizontal direction in a plane and which are developed to receive a first radio signal, having second antenna elements which are each situated above or below the horizontally situated first antenna elements and which are developed to receive the first radio signal, and having a processing device which is developed to calculate an azimuth angle and an angle of elevation of an object, that is located in front of the antenna array, from the radio signal received by the first antenna elements and from the radio signal received by the second antenna elements. Also described is a radar system, a vehicle and a method.

Abstract: A radar device generates pair data items by associating angle peaks of an up section and angle peaks of a down section. Thereafter, on the basis of a plurality of specific pair data items whose positions are close to each other in an angle direction and which are substantially the same in the position in a distance direction intersecting with the angle direction and are substantially the same in relative speed, the radar device derives one representative pair data item. The derivation of one representative pair data item is performed before continuity determination of a continuity determining unit at the same process timing is performed.

Abstract: A vehicle remote function system is provided for determining locations of a fob relative to a vehicle. The system may include a controller configured for communication with antennas mounted at different locations in the vehicle, the controller for use in determining locations of the fob based on ultra-wide band wireless signals transmitted between the antennas and the fob. The controller is configured to use a first filtering of the wireless signals to determine an initial location of the fob, and a second filtering of the wireless signals to determine a subsequent location of the fob. A method is also provided which may include transmitting ultra-wide band wireless signals between the fob and antennas mounted in the vehicle, using a first filtering of the wireless signals to determine an initial location of the fob, and using a second filtering of the wireless signals to determine a subsequent location of the fob.

Abstract: Resolution of perspective in three dimensions is necessary for intermeshing real players into simulated environments during virtual training exercises. With the advent of high resolution image sensors the ability to sense position and orientation using image capture devices is possible. The combination of small sized sensors and image recognition tracking algorithms allows the tracking element to be placed directly on the device whose perspective is desired. This provides a solution to determining perspective as it provides a direct measurement from the center axis of the observer. This invention employs a perspective tracking device to determine a point-of-gaze or a point-of-aim in a three-dimensional space to a high degree of accuracy. Point-of-gaze may be used to determine views for head mounted displays and aim-points for weapons. The invention may operate in an unconstrained space allowing simulation participants to operate in a larger, open environment.

Abstract: A method and apparatus for determining a direction of arrival of an acoustic event of interest that arrives at an array. Data acquired from the array is received. A portion of the data that represents an acoustic signature for the acoustic event of interest is identified. An azimuth angle may be computed for an acoustic event using the portion of the data identified. An elevation angle for the acoustic event is computed using a beamforming process customized based on the azimuth angle computed.

Abstract: A steering wheel in a vehicle can be in one of an operating position and a stowed position. Crash sensor data is monitored to detect a first and second frontal collision. Upon detecting the first frontal collision, a selected one of a first airbag and a second airbag is deployed depending on whether the steering wheel is in the stowed position or the operational position. When the steering wheel is in the operational position and a second collision is detected both the first and second airbags may be deployed.

Abstract: A system includes one or more processors, and data storage configured to store instructions that, when executed by the one or more processors, cause the system to perform functions. In this example, the functions include receiving sensor data that is collected by one or more sensors of a device over one or more locations and over a time period. Further, in the present example, the functions also include determining location estimates of the device by performing filtering of the sensor data to determine offsets for a least one sensor providing sensor data. The filtering is an iterative process of filtering control input data to determine the sensor bias based on data from a second sensor of the at least two sensors and adjusting the set of sensor data based on the determined bias.

Abstract: A non-wearable Personal Emergency Response System (PERS) architecture is provided, implementing RF interferometry using synthetic aperture antenna arrays to derive ultra-wideband echo signals which are analyzed and then processed by a two-stage human state classifier and abnormal states pattern recognition. Systems and methods transmit ultra-wide band radio frequency signals at, and receive echo signals from, the environment, process the received echo signals to yield a range-bin-based slow signal that is spatio-temporally characterized over multiple spatial range bins and multiple temporal sub-frames, respectively, and derive from the slow signal multiple characteristics of human(s) in the environment. The reception antennas may be arranged in several linear baselines, implement virtual displacements, and may be set into multiple communicating sub-arrays.

Abstract: A collision determination device includes: a radar detection unit that detects an object in front of a vehicle using a radar wave; an image detection unit that captures an image in front of the vehicle and detects the object using the captured image; and a collision determination unit that determines a collision between the vehicle and the object based on a composite target which is generated using a detection result of the radar detection unit and a detection result of the image detection unit. The collision determination unit performs collision determination on the basis of the detection result of the image detection unit, instead of the collision determination based on the composite target, when it is determined that the object cannot be detected by the radar detection unit and can be detected by the image detection unit and the object is stationary in a traveling direction of the vehicle.

Abstract: Generally, this disclosure provides systems and methods for a modular antenna array using radio frequency (RF) and baseband (BB) beamforming. A system may include a plurality of antenna modules, each of the antenna modules further including an array of antenna elements coupled to an RF beamforming circuit, the RF beamforming circuit to adjust phase shifts associated with the antenna elements to generate an antenna beam associated with the antenna module; and a central beamforming module coupled to each of the antenna modules, the central beamforming module to control the antenna beam associated with each of the antenna modules and to generate signal adjustments relative to each of the antenna modules, wherein the arrays of antenna elements of the antenna modules combine to operate as a composite antenna beamforming array.

Abstract: Determining distance and relative speed includes a transmitter transmitting electromagnetic signals defined by a plurality of sections, a first section comprising a continuous-wave (CW) signal, a second section comprising a chirp electromagnetic signal, the chirp electromagnetic signal comprising a plurality of subsections. A detector detects reflected signals being the transmitted electromagnetic signals reflected from an object, and comprising a reflected CW signal and a reflected chirp signal. The detector detects the reflected signals by: (i) generating a plurality of samples of the reflected CW signal, and (ii) generating a plurality of samples of the reflected chirp signal. A processor determines a first set of phase differences among the plurality of samples of the reflected CW signal and a second set of phase differences among the plurality of samples of the reflected chirp signal, and processes the first and second sets of phase differences to determine the distance, relative speed and bearing.

Abstract: A radar system for discriminating between sources of radar interference and targets of interest. The system includes a transmitter for transmitting radar signals into a region, a receiver for receiving return signals of the radar signals returned from within the region, and a processor for processing the return signals to discriminate between return signals returned from a first object and return signals returned from a second object where the return signals from the second object comprise both zero and non-zero Doppler components and interfere with the return signals from the first object. The radar system is operable for discriminating between the return signals when the return signals are received at a distance from the second object which is less than a proximity limit based on the geometry of the object.

Abstract: There is provided a radar apparatus configured to emit a transmission wave, to receive a reflected wave as a reception signal, and to derive target information including at least position information of a target from peak signals which are extracted by performing FFT processing for a beat signal that is generated from the reception signal. A determination unit is configured to determine whether a specific peak signal exists at a frequency that is distant from a frequency of the peak signal existing at a first frequency by a frequency of one selected peak signal selected from the plurality of peak signals. An exclusion unit is configured to exclude the target information corresponding to the selected peak signal from an output object of the radar apparatus when the specific peak signal exists.

Abstract: A method and associated apparatus using delay correlation for determining whether an input signal is a target signal is provided. The method includes sampling the input signal to generate 2N sample values, the sample values having a period N, where N is a positive integer; calculating the 2N sample values to obtain a first value according to a first operation method; calculating the 2N sample values to obtain a second value according to a second operation method; obtaining a determination value according to the first value and the second value; and determining whether the input signal is the target signal according to the determination value and a threshold.

Abstract: The present disclosure provides a method, includes: a first stepped-impedance transmission line configured to receive a first signal of a first differential signal; a second stepped-impedance transmission line configured to receive a second signal of the first differential signal, where the first stepped-impedance transmission line and the second stepped-impedance transmission line superpose the first signal of the first differential signal on the second signal of the first differential signal to obtain a first frequency multiplied signal; a first inverse stepped-impedance transmission line configured to be inversely ground-coupled with the first stepped-impedance transmission line and grounded at an end near an output end of the first stepped-impedance transmission line; a second inverse stepped-impedance transmission line configured to be inversely ground-coupled with the second stepped-impedance transmission line and grounded at an end near an output end of the second stepped-impedance transmission line.

Abstract: The present invention relates to a polychronous wave propagation system that is based on relative timing between two or more propagated waves through a wave propagation medium. The relative timing may be associated with interference patterns of energy between the propagated waves. Operational behavior of the polychronous wave propagation system is based on the relative timing of the propagated waves and distances between initiators that transmit the propagated waves and responders that receive the propagated waves. The operational behavior may include arithmetical computations, memory storage, Boolean functions, frequency-based computations, or the like. The polychronous wave propagation system relies on time delays between the propagated waves that result from propagation velocities of the propagated waves through the wave propagation medium. By incorporating the time delays into the system, operational capacity may be greatly enhanced.

Abstract: An apparatus measures an electromagnetic signal (e.g., light) propagation time delay that varies with system speed relative to its propagation medium. A one-way light propagation time measurement in the medium between two fixed points moving relative to the medium is used. The delay is compared with light propagating in a constant reference path that is independent of motion. A two-way system is also used, as well as increasing sensitivity through a light zigzag and fiber optic coil delay. The apparatus is a compact and extremely sensitive speedometer.

Abstract: In a dual-frequency CW radar apparatus, first/second beat signals that include reflection components of radar waves conforming to transmission signals of first/second frequencies are generated for each antenna element and the generated signals are Fourier transformed. A power spectrum average of the beat signals is used as a basis for the detection of a peak frequency fp corresponding to the frequency of the reflection components. A second eigenvalue ?2 of a correlation matrix: Ry=(½)·[y1,y2][y1,y2]H is calculated, the matrix being based on first received vector y1/second received vector y2 having elements that are Fourier transformed values of the peak frequency fp. Based on the magnitude of the eigenvalue ?2, whether or not the reflection components corresponding to the peak frequency fp are synthetic components of the reflected waves from a plurality of targets is decided.

Abstract: Provided is a technique capable of suppressing the deterioration in azimuth resolution and distance resolution in even a modulated and transmitted or received signal or a signal reflected by an object and varied in intensity when acquiring waveform information. A measurement device comprise: a plurality of sensors which receive waves propagating through a space; and a sampling timing calculation means which obtains, on the basis of the relative positions of the sensors and the velocities of the waves, the difference between the arrival times of the waves received by the respective sensors and calculates, for each sensor, sampling timing for acquiring the waveform information relating to the waves, on the basis of the difference between the arrival times.

Abstract: The invention consists of a method that makes it possible to produce an association of bistatic blips, formed by the different bistatic bases of a multistatic radar system comprising a plurality of transmitters and receivers remote from one another, this association making it possible to transmit to the tracking means only bistatic blips that probably correspond to one and the same target so as to facilitate the work of the tracking means. The association of blips that is produced takes into account the parameters defining, in three dimensions, the bistatic measurements (distance and speed), as well as the azimuth measurement, relating to the corresponding target.

Abstract: An embodiment of the present invention relates to a radar apparatus, wherein a distance to a target and a velocity of the target are measured by transmitting a digitally modulated transmitting signal using a digital code and receiving and demodulating an echo signal returned due to reflection of the transmitting signal from the target.

Abstract: A method for determining at least one parameter for the purpose of correlating two objects (10, 20), particularly the distance (r) and/or the relative speed (v) of the two objects (10, 20). A plurality of transmission pulse sequences following one after the after, each with at least one transmission pulse of an electromagnetic signal, forms a series of transmission pulse sequences. The duration of transmission of the individual transmission pulses is varied from transmission pulse sequence to transmission pulse sequence in order to reduce the susceptibility to interference in the determination of the at least one parameter.

Abstract: There is a calculation device for a radar apparatus which is configured to specify a direction of a target based on a reception signal of an antenna. A calculation unit is configured to calculate a relative displacement magnitude in a lateral direction of the target relative to a traveling direction of a moving object having the antenna mounted thereon, from data of the target position-measured by the reception signal while the moving object is moving, and evaluate a relative inclination between a reference axis of a scanning direction of the radar apparatus and a reference axis of the traveling direction of the moving object, based on the displacement magnitude.

Abstract: According to one embodiment, a target tracking apparatus calculates N-dimensional predicted values from a respective stored (N+1)-dimensional tracks for each of the targets, determines whether or not the N-dimensional predicted value for each of the targets is correlated with the received N-dimensional angle observed value for the target, if the N-dimensional predicted value is not correlated, generates a new (N+1)-dimensional track for the target based on the N-dimensional track corresponding to the N-dimensional angle observed value and if the N-dimensional predicted value is correlated, updates and stores the (N+1)-dimensional track using the N-dimensional angle observed value.

Abstract: A method for detecting the motion of object by ultra-wideband radar imaging and system thereof to be used to present the motion of object in a reference gray-level image by using the delay time to analyze the distance between the detected position of object and the detecting position to compare the time-varying distance variation between the reference distance and the detecting distance. The system includes a transmitter module, a receiver module and a signal processing module. The transmitter module is used to transmit a first ultra-wideband signal from a detecting position to the object. The receiver module is used to receive a second ultra-wideband signal reflected from the object in the detecting position. The signal processing module is used to analyze the signal delay time of the second ultra-wideband signal received in the detecting position to analyze the detecting distance between the second ultra-wideband signal and the detecting position.

Abstract: A traffic collision avoidance system (TCAS) based navigation system including a TCAS equipped with a directional antenna, the TCAS configured to generate a RF transmission pattern at a selected frequency, the transmission pattern including a plurality of directional beams, receive a plurality of RF signals reflected from the ground across a selected frequency band, the selected frequency band including the selected frequency, and measure frequency differences between one or more beams of the plurality of RF beams and one or more beams of the plurality of RF signals reflected from the ground, and a computing systems in communication with the TCAS, the computing system configured to calculate a ground speed of the aircraft utilizing the measured frequency differences, calculate a drift angle of the aircraft utilizing the measured plurality of frequency differences, receive a heading reference of the aircraft, and determine an aircraft navigation parameter of the aircraft.

Abstract: A weapon-locating ladar system estimates a backward trajectory of an airborne target by using flow field measurements to follow the wake turbulence trailing the airborne target from a position at which the target is detected backwards until the wake is no longer observable. The system may use the backward trajectory to estimate the point-of-origin of the target. The system may also use the flow field measurements along the backward trajectory to classify the target. Target classification may be used to refine the point-of-origin estimate, to influence counter-fire or to adapt the flow field measurements.

Abstract: A radar device including a frequency peak detection unit for receiving reflected waves from objects, a first combination group determination unit for combining up frequency peaks with down frequency peaks, a first pairing candidate group determination unit for calculating a Mahalanobis distance for each combination, a second combination group determination unit for combining down frequency peaks with up frequency peaks, a second pairing candidate group determination unit for calculating a Mahalanobis distance, a pairing candidate group extraction unit for removing the pairs having larger Mahalanobis distances, a current pairing candidate group determination unit for removing the pairs having a Mahalanobis distance larger than or equal to a threshold value, and a current data calculation unit for calculating current data values that include a distance, relative velocity and angle of the objects. The characteristic values include angles, power and spectrum intensity.

Abstract: The conventional ESPRIT method is accompanied by the problem of very long signal processing time. The radar device of the invention includes a signal vector-forming unit for forming signal vectors based on waves reflected from an object and received by using a plurality of receiving antennas; a submatrix-forming unit for forming submatrices based on the signal vectors; a regular matrix operation unit for calculating a regular matrix from the submatrices; an eigenvalue decomposition unit for calculating an eigenvalue of the regular matrix; and an angle calculation unit for calculating an angle at where the object is present from the eigenvalue.

Abstract: In a method of determining a deviation of a path of a projectile from a predetermined path, the method uses an image of a target area in which the desired path or direction is pointed out. Subsequently, the real direction or real path is determined and the deviation is determined.

Abstract: An electronic scanning radar apparatus mounted on a moving object includes a receiver unit including a plurality of antennas receiving a received wave arriving from a target having reflected a transmitted wave, a beat signal generating unit generating a beat signal from the transmitted wave and the received wave, a frequency resolving unit resolving the beat signal into beat frequencies having a predetermined frequency bandwidth and that calculates complex data based on the beat signal resolved for each beat frequency, and an azimuth detecting unit estimating a wave number of the received wave based on singular values calculated from a matrix created based on the complex data calculated based on the beat signal and calculating a direction of arrival of the received wave based on coefficients calculated based on a pseudo-inverse matrix of the matrix included in a signal subspace determined by the estimated wave number.

Abstract: A method using an antenna arrangement. The antenna arrangement includes a switched transmission antenna array with a number of transmission antennas, which radiate a radar transmission signal one after the other corresponding to a predetermined switching sequence. A first receiving antenna and a second receiving antenna receive the transmitted radar signals and reflected by at least one radar target. A first set of received signals by the first receiving antenna during the switching sequence of the transmission antenna array; receiving a second set of received signals by the second receiving antenna simultaneously with receiving the first set of received signals by the first receiving antenna during the switching sequence of the transmission antenna array; and from these signals the angular position of the at least one radar target based on the first set and the second set of received signals using an ESPRIT method is determined.

Abstract: Systems and methods for providing personal radar, object presence detection, and object localization are provided. Multiple devices that perform high-resolution ranging can be operated to perform radar in an area, detect objects and motion of objects in the area, and generate a virtual steerable antenna.

Abstract: In exemplary implementations of this invention, a radio signal is transmitted between a transmitter and a receiver. Either the transmitter, or receiver, or both, have a directional antenna. When organic tissue passes between (or is stationary between) the transmitter and receiver, the tissue causes a reduction of the received signal strength (RSS) of the signal, as compared to a baseline RSS. The larger the amount of tissue, the greater is the reduction of the RSS. By analyzing the degradation of the signal, information about organic tissue between the transmitter and receiver may be determined. For example, the number of persons passing through a physical threshold may be determined. Or the fact that one person is walking faster than, and catching up with, a second person as they pass between the transmitter and receiver may be determined.

Abstract: In a radar apparatus, a peak extractor performs frequency analysis on a beat signal to obtain a frequency spectrum for each of first and second detection modes based on the beat signal for a corresponding one of the first and second detection modes. The peak extractor extracts a plurality of first peak-signal components from the frequency spectrum obtained for the first detection mode, and a plurality of second peak-signal components from the frequency spectrum obtained for the second detection mode. A determiner compares each of the plurality of first peak-signal components with a corresponding one of the plurality of second peak-signal components to deter mine whether a noise is included in the beat signal according to a result of the comparison.

Abstract: Various targets are detected in a more accurate manner. Provision is made for a receiving antenna part that has a plurality of receiving antennas arranged in a horizontal direction with a part thereof being shifted in a vertical direction from the others, and has a plurality of combinations of the receiving antennas, of which each combination detects an azimuth in the horizontal direction and an azimuth in the vertical direction of a target; and detection means that detects the target a plurality of times while changing the combination of the receiving antennas. The detection accuracy of the target can be enhanced by making a comparison between at least two detection results obtained by the detection means.

Abstract: A device and a method for determining the position of an object, in particular of a moving object, in a three dimensional space is made available. Here the device comprises at least two switchable transmitting antenna arrays having different vertical beam alignments and a number of receiving antennas arranged in a row. The transmitting antennas are arranged spaced apart by a distance that corresponds to the distance between the outer phase centres of the receiving antennas. Otherwise the transmitting antennas can be positioned arbitrarily around the receiving antenna. The horizontal beam sweep over a wide angle range is implemented by the “digital beam forming” method. The vertical object position is measured by comparing the amplitude of the received signals with sequentially operated transmitting antennas having different vertical beam directions.

Abstract: A radar system comprising a transmitter to transmit radar signals into a region, a receiver to receive return signals of said radar signals reflected from within the region wherein the transmitter and receiver are adapted for location on a structure at a wind farm, and a processor to process the return signals to extract wind farm associated data for said region.

Abstract: A method for estimating the position and the speed of a target with a radar is provided. The radar emits a waveform including a train of pulses, each pulse having an OFDM chip constructed from subcarriers, the subcarriers covering the whole bandwidth of the radar. Upon receipt of the echoed pulses, some of the subcarriers are used in a step of Doppler processing, each of the subcarriers being fixed over the pulses. Upon receipt of the echoed pulses, other subcarriers, which are not used for Doppler processing, are used in a step of High Range Resolution processing, the subcarriers being randomly distributed over the pulses.

Abstract: A system for providing a multi-mode, multi-static interferometer may include a transmitter array, a receiver array and a processor. The transmitter array includes at least a first transmitter and a second transmitter spatially separated from each other by a first known distance. The receiver array includes at least a first receiver and a second receiver spatially separated from each other by a second known distance. The receiver array is positioned to enable receipt of a return signal from transmissions provided by the transmitter array and reflecting off an object. The processor is configured to enable the transmitter array to generate uniquely coded signals and configured to distinguish, based on the uniquely coded signals, a first signal transmitted by the first transmitter from a second signal transmitted by the second transmitter in response to reception of a combined signal including reflected signals corresponding to at least the first and second signals by the receiver array.

Abstract: The system of the present invention is a vehicle collision warning and prevention system. It is capable of detecting and calculating the speed, distance, location, and arrival time of the oncoming vehicles and determining whether the oncoming vehicles may collide with the vehicle having the system on board. The system thus warns the driver in the vehicle about the speed, distance, location, and the arrival time of the oncoming vehicle (time of accident). The system is capable of deploying barriers (i.e. air cushions or air bags) in a fraction of a second before the collision between the vehicle and the oncoming vehicle. The system is capable of reducing the impact of the auto collision more than any or most auto collision protection in the market today. The system will protect or prevent most body damages to the front and rear of the car in an auto collision.

Abstract: A driving assist apparatus for a vehicle is disclosed. The driving assist apparatus includes a transmitter for transmitting a transmission wave, a receiver for receiving a reflected wave, an obstacle presence determination section for detecting a presence of an obstacle in the surrounding of the vehicle based on the reflected wave, a measurement section for measuring a frequency of phase delay and advance of the reflected wave with respect to a reference signal, and a detection section for detecting the obstacle having a specific relation with the vehicle based on the presence of the obstacle determined by the obstacle presence determination section and the frequency of delay and the frequency of advance measured by the measurement section.