Apparatus and methods for contact-minimized automated teller machine (“ATM”) use and transaction processing using Doppler-radar based gesture recognition and authentication. The apparatus and methods may include an ATM including a millimeter-wave radar transmitter and receiver. Movement of one or more objects, including fingers, within a radar field may be analyzed and translated into gestures and authentication passcode(s). By utilizing the radar field instead of physical buttons or a touchscreen, contact with the ATM may be minimized.

A system for observing a flow characteristic of a fluid is provided. The system includes a nadir-facing sensor, an angle flow sensor, and processing circuitry. The nadir-facing sensor and the angle flow sensor are both provided at a distance above the fluid. The nadir-facing sensor and the angle flow sensor are both radar sensors. The processing circuitry is configured to receive sensor data from the nadir-facing sensor and the angle flow sensor. The sensor data includes at least one of a fluid speed or a fluid surface level. The processing circuitry is configured to determine the flow characteristic based upon the sensor data.

A multi node radar network system is disclosed. The system includes a base node configured to transmit a directional 5G RF signal, a request node configured to request the base node to transmit the 5G RF signal, and one or more listening nodes configured to receive reflections of the 5G RF signal off of a target object. The system further includes a computation module configured to determine the location of the target object from data received from at least one of the base node, the request node, or the one or more listening nodes. A method for determining the position of a target object in a multi node radar system is disclosed.

Methods and systems include, in at least one aspect: determining an optical model of an object in flight using two dimensional image data obtained from a camera, determining a radar model of the object in flight using radar data obtained from a radar device, combining the radar model with the optical model to produce three dimensional location information of the object in flight in three dimensional space, comparing the three dimensional location information of the object in flight with data representing an expected ball launch, and rejecting (or verifying) the object as an actual ball launch in response to the three dimensional location information of the object in flight differing (or not differing) from the data representing the expected ball launch by a threshold amount.

Systems and methods for determining fine grain motions and vibrations of live and/or inanimate objects are described based on using a radar system. For example, biometric information may be extracted from such vibrations associated with a live object. In different embodiments, processing circuitry may perform different statistical analysis on reflections from the objects. Moreover, the processing circuitry may perform different processing functions based on the statistical analysis to determine the vibrations with high accuracy. Furthermore, the processing circuitry may also select one or multiple target maps based on a field of view of the radar system for a more robust measurement of the vibrations associated with one or multiple objects.

The present invention provides a radar velocity measurement system, method, and radar device. The system includes a radar module and an electrically connected signal processor. The radar module includes a transmission antenna and a receive antenna. The signal processor includes a sequence unit, a conversion unit, and a compare calculation unit that are coupled with each other. The sequence unit establishes an even number receive sequence and an odd number receive sequence. The conversion unit carries out a time domain to frequency domain conversion upon the receive sequences to generate a first reflection signal and a second reflection signal, respectively. The compare calculation unit uses an interpolation method to compare the phase difference between the reflection signals with a comparison model to obtain a true velocity. Therefore, the present invention effectively prevents the velocity ambiguity issue of radar system.

A method for monitoring the traffic flow with the aid of a stationary radar sensor, which operates in the frequency band of 76 GHz to 77 GHz and is operated in such a way that it meets a radiation protection criterion according to which, in a sequence of consecutive time intervals which all have the same length T, each of these time intervals includes an uninterrupted radiation-free time period of at least 0.9 T. An arbitrary stationary point in the surroundings of the radar sensor within each of these time intervals is exposed to the radar radiation of this radar sensor for no more than a radiation duration of L≤T/100. The radar sensor is static during the measuring operation, and the radiation protection criterion is met by the temporally clocked operation of the radar sensor.

A system may include a transmitter node and a receiver node. Each node may include a communications interface including at least one antenna element and a controller operatively coupled to the communications interface, the controller including one or more processors, wherein the controller has information of own node velocity and own node orientation. Each node of the transmitter node and the receiver node may be in motion. Each node may be time synchronized to apply Doppler corrections associated with said node's own motions relative to a common reference frame. The common reference frame may be known to the transmitter node and the receiver node prior to the transmitter node transmitting signals to the receiver node and prior to the receiver node receiving the signals from the transmitter node.

A method for estimating a spin of a projectile, the method comprising obtaining a first data series representing a radial velocity of a projectile over time in accordance with a radar signal reflected from the projectile, subtracting a center velocity of the first data series from the first data series to form a second data series representing a variation of the radial velocity of the projectile around the center velocity over time, dividing the second data series into respective time intervals, estimating, for each of the time intervals of the second data series, a frequency of the variation of the radial velocity of the projectile around the center velocity, and determining a spin of the projectile based on the estimated frequencies of the variation of the radial velocity of the projectile.

The present disclosure relates to a radar apparatus including a transmitter for transmitting a frequency-modulated continuous-wave radar signal, wherein the transmitter is configured to generate the continuous-wave radar signal with a sinusoidally varying modulation frequency, a receiver for receiving a reflection signal of the frequency-modulated continuous-wave radar signal, which is reflected by at least one object, and for mixing the reflection signal with the frequency-modulated continuous-wave radar signal in order to obtain a downmixed reception signal, and a device for correlating the downmixed reception signal with at least one pattern signal which is based on the modulation frequency and a predetermined distance.