A plurality of transmission antennas include Nt1 transmission antennas arranged in a first direction and Nt2 transmission antennas arranged in a second direction orthogonal to the first direction, a plurality of reception antennas include Na1 reception antennas arranged in the first direction and Na2 reception antennas arranged in the second direction. In the first direction, an inter-element space between any two of the Nt1 transmission antennas and an inter-element space between any two of the Na1 reception antennas are each a value which is a product of a first space and an integer and are all values different from each other, and in the second direction, an inter-element space between any two of the Nt2 transmission antennas and an inter-element space between any two of the Na2 reception antennas are each a value which is a product of a second space and an integer and are all values different from each other.

A MIMO radar system. The system includes transmitter and receiver arrays, and a control and evaluation unit, designed to: transmit transmission signals according to a time and frequency multiplex scheme in each of multiple repeatedly implemented measuring cycles, the time space and frequency space being divided into non-overlapping time slots and frequency sub-bands and only one single transmitting antenna being active in each time slot and transmitting in only one single frequency sub-band, carry out preliminary distance estimations and Doppler estimations, each based on signals of an individual transmitting antenna, in a first evaluation stage based on signals received in one measuring cycle, and carry out joint distance, Doppler, and angle estimations using a multi-dimensional estimation algorithm in a second evaluation stage based on phases of the signals transmitted by various transmitting antennas, results of the first evaluation stage being refined by increasing the accuracy and/or by eliminating ambiguities.

A method of tracking objects using a radar, includes sending a beamcode to at least one radar antenna to set a predetermined direction, using samples from a random distribution of at least one of a phase or an amplitude to generate a tracking signal pulse train, transmitting the pulse train from the at least one antenna within a pulse time window, receiving return signals from objects at the at least one antenna, and using the return signals to gather data to track the objects. A radar system has at least one radar antenna to transmit a tracking signal, a memory to store a set of random distributions, a controller connected to at least one radar antenna and the memory, the controller to execute instructions to determine which random distribution to use, generate a pulse train using the random distribution, transmit the pulse train to the at least one radar antenna as the tracking signal, and gather measurement data about objects returning signals from the tracking signal.

A full duplex dual polar radar transceiver comprising a dual polarisation radar antenna, a transmission path, a horizontal polarisation receive path, and a vertical polarisation receive path, a first cancellation path connected between the transmission path and the vertical polarisation receive path, and a second cancellation path connected between the transmission path and the horizontal polarisation receive path. Each cancellation path is configured to vary a transmission signal provided by the transmission path by varying at least one of a phase shift, a delay, or an amplitude so as to cancel self-interference on each of the vertical and horizontal polarisation receive paths.

Approaches for synchronising electronic animal identification tag readers for reading electronic animal identification tags attached to animals Embodiments include using a pulse from a GNSS receiver, adjusting for an error between a reference cadence signal and a local cadence signal, and using a synchronisation signal.

Approaches for synchronising electronic animal identification tag readers for reading electronic animal identification tags attached to animals Embodiments include using a pulse from a GNSS receiver, adjusting for an error between a reference cadence signal and a local cadence signal, and using a synchronisation signal.

The present invention is to provide a distance measuring device capable of distinguishing between a reflection from fog or the like and a reflection from an actually existing object in an environment such as fog. The invention is a distance measuring device including a light-emitting element 12 that transmits a signal, a light-receiving element 15 that receives a signal transmitted by the light-emitting element 12 and reflected by an object, and outputs a reception signal corresponding to a received signal strength, a comparator 19 that outputs a first signal equal to or greater than a first threshold value with respect to signal strength and a second signal equal to or greater than a second threshold value higher than the first threshold value from the reception signal, and a signal processing unit 10 that distinguishes the reception signal as valid or invalid or not from a relationship between a first time span from when the first signal becomes equal to or greater than the first threshold value until the first signal becomes less than the first threshold value and a second time span from when the second signal becomes equal to or greater than the second threshold value until the second signal becomes less than the second threshold value.

An elevator system has an elevator controller system to control movement of an elevator car between a predetermined number of floors of a building, and an elevator operating panel communicatively coupled via a multicore cable to the elevator controller system. The elevator operating panel includes at least one push-button having an open state and a closed state, wherein the push-button is configured to close in the closed state a wire loop of the multicore cable, and wherein the push-button is configured to be in the closed state when a user presses the push-button to enter an elevator call. In addition, the elevator system includes an ancillary operating panel arranged next to the elevator operating panel and having a proximity sensor for touchless entry of an elevator call.

A method for determining presence of an object via a vehicular radar sensing system includes providing a radar sensor having a plurality of antennas, which includes a plurality of transmitting antennas and a plurality of receiving antennas. The plurality of antennas includes a plurality of sets of antennas, each set having a V shape or an X shape, and with each of the shaped sets of antennas having an apex. A signal feed is provided to the apex of each of the shaped sets of antennas. A radar beam is transmitted via the plurality of transmitting antennas and side lobes of the transmitted radar beam are reduced via the plurality of shaped sets of antennas. An output of the receiving antennas is communicated to a processor, and the processor determines presence of one or more objects exterior the vehicle and within the field of sensing of the radar sensor.

A method to select multiple returns in a light detection and ranging (LIDAR) system includes thresholding a frequency domain waveform to identify a number of peaks above a threshold level. After thresholding, a primary peak selection is applied to identify a primary peak. After identifying a primary peak, a secondary peak selection is applied to a portion of the frequency domain waveform outside a guard-band area to identify a secondary peak.