A method for evaluating overlapping targets in a two-dimensional radar spectrum, wherein the following steps are carried out: providing the two-dimensional radar spectrum, selecting at least one region of interest as an input signal from the spectrum, and performing an evaluation of the input signal to determine an information about the overlapping targets, wherein the evaluation is specific for a model order selection method.

Complex transfer functions indicating characteristics of propagation between transmission antenna elements and N reception antenna elements are calculated from reception signals received by the N reception antenna elements during a predetermined period. Components affected by vital activity are extracted from the calculated complex transfer functions. A correlation matrix is calculated from changed components affected by vital activity. A steering vector for regions divided from a target region is calculated. A living-body signal intensity vector is estimated by performing compressed sensing for an unknown value that is the living-body signal intensity vector using a correlation matrix vector and an extended steering vector. The number of components constituting the living-body signal intensity vector and having a value of at least a predetermined threshold is estimated to be the number of living bodies, and positions of regions corresponding to the components are estimated to be estimated positions of the living bodies.

A method includes receiving from a transceiver, at a processor of an electronic device, a radar signal, the radar signal including a set of signal strength values across a range of Doppler frequency shift values and a range of time values. The method further includes extracting a time series of frequency features from the radar signal, wherein frequency features of the time series of frequency features include a determined Doppler frequency shift value for each time value of the range of time values, identifying segments within the time series of frequency features, analyzing the segments to determine a start time for a classification engine, at the start time, analyzing, by the classification engine, at least one of a subset of the time series of frequency features or a subset of the radar signal to identify a control gesture, and triggering a control input associated with the control gesture.

The invention relates to a device and method for laboratory ice jam and ice dam radar measurement tests, the device includes a non-metal water tank, a truss spans the top of the non-metal water tank, the truss is connected with a radar plate parallel to a surface of water through a lifting mechanism, a measuring radar is provided on the radar plate, a permeable measuring barrel soaked in the water is provided below the radar plate, a barrel bottom of the permeable measuring barrel is a permeable plate capable of rising and falling, model ice blocks are provided in the permeable measuring barrel, and a handle capable of shaking the truss upwards, downwards, leftwards and rightwards is provided on the truss. According to the invention, through establishing simulated ice jam and ice dam in the permeable measuring barrel, the formation and characteristics of the ice jam and the ice dam are tested, and systematic research can be carried out to address the difficulties, such as radar echo images and the dielectric constant, in the radar measurement of the ice jam and the ice dam and a water depth underneath the ice, so that the measurement accuracy of corresponding equipment is improved, and further development of related disciplines is promoted. A whole set of the device is simple in structure, low in cost, and facilitated and effective in the implementation of tests.

A radar system including a transmit antenna for transmitting a radio frequency (RF) signal or a radar signal and a receive antenna for receiving a plurality of reflected signals created by a plurality of targets reflecting the RF signal or radar signal. The reflected signals include noise. The radar system also includes an analog-to-digital converter (ADC) that digitizes or samples the reflected signals to provide a digitized or sampled noisy input signal. The radar system further includes a reservoir computer that receives the noisy input signal. The reservoir computer includes a time-varying reservoir and is configured to de-noise the noisy input signal and provide a range measurement for each of the plurality of targets.

A wireless multimode system includes: an array of N antenna elements that includes a first portion of M antenna elements and a second portion of L antenna elements; M transmission amplifiers configured to transmit, via the M antenna elements, frames of transmit data, where the frames of transmit data include transmit radar signals and transmit communication signals; M reception amplifiers configured to receive, via the M antenna elements, frames of receive data, where the frames of receive data includes receive communication signals; and L reception amplifiers configured to receive, via the L antenna elements, receive radar signals; and a resource scheduler configured to allocate bandwidth for transmit radar signals and transmit communication signals within the frames of transmit data based on one or more predetermined parameters.

Embodiments of this disclosure provide a radar-based posture recognition apparatus, method and an electronic device. The method includes: acquiring radar reflection point information based on radar echo signals reflected from a detected target, and clustering radar reflection points; in a first time period, calculating spatial morphological feature information and/or motion feature information of a target point set obtained by clustering; in a second time period, counting the spatial morphological feature information and/or the motion feature information of a plurality of first time periods to obtain motion process feature information in the second time period; and taking the motion process feature information within a second time period in which a current moment is present and the spatial morphological feature information and/or the motion feature information in a first time period in which the current moment is present as a feature set, to determine the posture of the detected target.

In one aspect, a method includes receiving signals directly or indirectly from a transmitter. The received signals include a target signal, a clutter signal and a reference signal. The method also includes filtering the clutter signal from the received signals, processing the filtered radar data to obtain range and Doppler data, detecting and tracking a target from the range and Doppler data and classifying the target.

Detection of a radar target from a received radar signal includes computing a vector of filter weights dependent upon a steering vector and determining a threshold value dependent upon a designated probability of false alarm. The vector of filter weights is applied to samples of the received radar signal at a test cell, corresponding to a test range, to provide a filtered test signal and a test power of the filtered test signal is computed. The weights are also applied to samples of the received radar signal at a number of reference cells, to produce filtered reference signals. A reference power is computed from the filtered reference signals and the radar target is detected at the test range when a ratio of the test power to the reference power exceeds the threshold value.

The invention relates to a device and method for laboratory ice jam and ice dam radar measurement tests, the device includes a non-metal water tank, a truss spans the top of the non-metal water tank, the truss is connected with a radar plate parallel to a surface of water through a lifting mechanism, a measuring radar is provided on the radar plate, a permeable measuring barrel soaked in the water is provided below the radar plate, a barrel bottom of the permeable measuring barrel is a permeable plate capable of rising and falling, model ice blocks are provided in the permeable measuring barrel, and a handle capable of shaking the truss upwards, downwards, leftwards and rightwards is provided on the truss. According to the invention, through establishing simulated ice jam and ice dam in the permeable measuring barrel, the formation and characteristics of the ice jam and the ice dam are tested, and systematic research can be carried out to address the difficulties, such as radar echo images and the dielectric constant, in the radar measurement of the ice jam and the ice dam and a water depth underneath the ice, so that the measurement accuracy of corresponding equipment is improved, and further development of related disciplines is promoted. A whole set of the device is simple in structure, low in cost, and facilitated and effective in the implementation of tests.