There is provided an estimation device that estimates a living body orientation. The estimation device includes: transceivers that transmit transmission signals using M transmission antenna elements arranged to surround a predetermined range including a living body, and receive reception signals using N receiving antenna elements; and a circuit that, for each of M sets of N reception signals corresponding to transmitted M transmission signals, performs calculation of a characteristic quantity based on the N reception signals included in the set, the characteristic quantity with a greater value indicating a waveform having a larger amplitude and higher regularity, identifies a first transmission antenna element corresponding to a first characteristic quantity having a greatest value among M characteristic quantities by comparing the M characteristic quantities obtained by the calculation with each other, and estimates the living body orientation to indicate a predetermined direction based on the first transmission antenna element identified.

During operation, transmitters in the electronic device provide first and second FMCW radar signals, where carrier frequencies of the first and the second FMCW radar signals have a predefined variation as a function of time over a predefined frequency range, and the predefined variation as a function of time of a second carrier frequency of the second FMCW radar signal has a predefined delay relative to the predefined variation as a function of time of a first carrier frequency of the first FMCW radar signal. Furthermore, at least a receiver in the electronic device receives first and second reflected FMCW radar signals within a bandwidth of the receiver, where, at a given time, a frequency difference between carrier frequencies of the first and the second reflected FMCW radar signals, which corresponds to the predefined delay, is less than the bandwidth (and which may be less than a predefined value).

In some examples, a system is configured to be mounted on a vehicle, the system including one or more phased-array radar devices configured to transmit first radar signals, receive first returned radar signals, transmit second radar signals, and receive second returned radar signals. In some examples, the system also includes processing circuitry configured to detect an object based on the first returned radar signals and determine an estimated altitude of the vehicle above a ground surface based on the second returned radar signals.

A radar image processing method includes acquiring captured images from radars synchronized to perform beamforming on a same point at a same time, synthesizing the captured images based on at least one overlapping area of the captured images, and generating a high-resolution image based on the synthesized images.

A radar image processing method includes acquiring captured images from radars synchronized to perform beamforming on a same point at a same time, synthesizing the captured images based on at least one overlapping area of the captured images, and generating a high-resolution image based on the synthesized images.

A positioning sensor includes m receiving antennas connected to a feeder circuit and n variable loads, and a receiver that receives a first signal via the m receiving antennas. The positioning sensor further includes a memory that stores a first signal strength value of a first signal that the receiver receives when a variable load varies in value, and a processor that calculates a second signal strength value from a complex propagation channel, searches for a complex propagation channel candidate that has a minimum difference between a first signal strength and a second signal strength, determines the complex propagation channel candidate to be a complex propagation channel when the receiver receives the first signal, and estimates an incoming direction of the first signal from the determined complex propagation channel.

A positioning sensor includes m receiving antennas connected to a feeder circuit and n variable loads, and a receiver that receives a first signal via the m receiving antennas. The positioning sensor further includes a memory that stores a first signal strength value of a first signal that the receiver receives when a variable load varies in value, and a processor that calculates a second signal strength value from a complex propagation channel, searches for a complex propagation channel candidate that has a minimum difference between a first signal strength and a second signal strength, determines the complex propagation channel candidate to be a complex propagation channel when the receiver receives the first signal, and estimates an incoming direction of the first signal from the determined complex propagation channel.

A radar system includes two or more nodes. Each node includes one or more transmit antennas and one or more receive antennas. The radar system also includes a processor to obtain received signals at each of the two or more nodes, estimate an angle of arrival of each target identified based on the received signals, estimate an offset of each of the two or more nodes from a known location, and compensate for the offsets in the process of estimating the angle of arrival for subsequent targets in the received signals.

A radar system includes two or more nodes. Each node includes one or more transmit antennas and one or more receive antennas. The radar system also includes a processor to obtain received signals at each of the two or more nodes, estimate an angle of arrival of each target identified based on the received signals, estimate an offset of each of the two or more nodes from a known location, and compensate for the offsets in the process of estimating the angle of arrival for subsequent targets in the received signals.

A radar sensor device including a first radar sensor arrangement configured to measure a fill level of a medium in a container and a second radar sensor arrangement configured to monitor an environment of the radar sensor outside the container.