A system and a method for signal sensing are provided. The system for signal sensing includes a processor, a transmitter, a receiver, and an oscillator. The oscillator is coupled to the transmitter and the receiver. The oscillator generates a clock signal. The transmitter transmits a plurality of output signals according to the clock signal. The receiver receives a first output signal reflected by an object according to the clock signal and obtains a channel state information according to the first output signal. The processor identifies a state of the object according to the channel state information and outputs the state of the object.

Disclosed herein are systems and methods for estimating target ranges, angles of arrival, and speed using optimization procedures. Target ranges are estimated by performing an optimization procedure to obtain a denoised signal, performing a correlation of a transmitted waveform and the denoised signal, and using a result of the correlation to determine an estimate of a distance between the sensor and at least one target. Target angles of arrival are estimated by determining ranges at which targets are located, and, for each range, constructing an array signal from samples of received echo signals, and using the array signal, performing another optimization procedure to estimate a respective angle of arrival for each target of the at least one target. Doppler shifts may also be estimated using another optimization procedure. Certain of the optimization procedures use atomic norm techniques.

The echoes being picked up in the distance-speed domain, the method being wherein it includes a step of producing a mask, in the distance-speed plane, overlying the zone of detection of the ground and/or sea clutter echoes picked up by the sidelobes, the zone being determinable by the antenna parameters of the radar, the waveform emitted by the radar and the environmental context of the radar, all the points of the distance-speed plane which are covered by the mask being assigned a characteristic which is specific to the mask; a step of filtering the received echoes, in which the echoes covered by the mask are rejected from the radar reception processing.

The echoes being picked up in the distance-speed domain, the method being wherein it includes a step of producing a mask, in the distance-speed plane, overlying the zone of detection of the ground and/or sea clutter echoes picked up by the sidelobes, the zone being determinable by the antenna parameters of the radar, the waveform emitted by the radar and the environmental context of the radar, all the points of the distance-speed plane which are covered by the mask being assigned a characteristic which is specific to the mask; a step of filtering the received echoes, in which the echoes covered by the mask are rejected from the radar reception processing.

Method and device for radar transmission and reception by dynamic change of polarization notably for the implementation of interleaved radar modes are provided. A radar transmission-reception method and a device for implementing this method, the method alternatively implementing two modes of operation, a short range mode exploiting short pulses and a long range mode exploiting modulated long pulses, the method consisting, for each mode, in: producing two synchronous radiofrequency (RF) transmission signals having between them a phase-shift of controllable given value; radiating two radiofrequency waves, each corresponding to one of the transmission RF signals produced, by means of two colocated radiating sources each having a given polarization axis; handling the reception of the backscattered radiofrequency signals picked up by each of the radiating sources, and delivering two radiofrequency (RF) reception signals each corresponding to a radiofrequency signal picked up by one of the radiating sources, a phase-shift being applied between the two signals delivered, being able to be determined as being equal to .

The present invention relates to a method for measuring the distance of targets in the surroundings by way of a time-of-flight measurement of pulses, in particular laser pulses, reflected at said targets, said pulses each being successively emitted at a transmission time in accordance with a predeterminable pulse repetition rate and said pulses, after the reflection thereof, each being received at a reception time, said method comprising the following steps: selecting a first pulse repetition rate from a set of at least two different pulse repetition rates and predetermining the selected pulse repetition rate for the emission, ascertaining a transmission time lying closest in time to the reception time of a reflected pulse and a time interval between these, and, if the ascertained time interval drops below a predetermined first threshold, selecting a second pulse repetition rate from the set and predetermining the second pulse repetition rate for the emission.

The present invention relates to a method for measuring the distance of targets in the surroundings by way of a time-of-flight measurement of pulses, in particular laser pulses, reflected at said targets, said pulses each being successively emitted at a transmission time in accordance with a predeterminable pulse repetition rate and said pulses, after the reflection thereof, each being received at a reception time, said method comprising the following steps: selecting a first pulse repetition rate from a set of at least two different pulse repetition rates and predetermining the selected pulse repetition rate for the emission, ascertaining a transmission time lying closest in time to the reception time of a reflected pulse and a time interval between these, and, if the ascertained time interval drops below a predetermined first threshold, selecting a second pulse repetition rate from the set and predetermining the second pulse repetition rate for the emission.

[OBJECT] To surely remove a multi-order echo or interference from another radar apparatus [ORGANIZATION] A radar apparatus transmitting pulse signals at predetermined repetition cycles and receiving and analyzing the pulse signals reflected by a target object to thereby detect the target object has: a setting means (control unit 11) setting so that at least a part of the repetition cycles of the pulse signals is different; a detection means (speed detection/object detection unit 16) detecting a distance to the target object specified by the pulse signal; and a removal means (clutter removal unit 17) removing the target object as clutter when the distance to the target object detected in the different repetition cycle or in a period subsequent to the different repetition cycle by the detection means and the distance to the target object detected in the period other than that by the detection means are different.

[OBJECT] To surely remove a multi-order echo or interference from another radar apparatus [ORGANIZATION] A radar apparatus transmitting pulse signals at predetermined repetition cycles and receiving and analyzing the pulse signals reflected by a target object to thereby detect the target object has: a setting means (control unit 11) setting so that at least a part of the repetition cycles of the pulse signals is different; a detection means (speed detection/object detection unit 16) detecting a distance to the target object specified by the pulse signal; and a removal means (clutter removal unit 17) removing the target object as clutter when the distance to the target object detected in the different repetition cycle or in a period subsequent to the different repetition cycle by the detection means and the distance to the target object detected in the period other than that by the detection means are different.

A method and system for removing ground clutter data from time series data are provided. The method comprises receiving first time series data, dividing the first time series data into a plurality of subsets of first time series data, applying a first regression filter to each respective subset first time series data of the plurality of subsets of first time series data to generate a plurality of regression filtered subsets of first time series data, and concatenating the plurality of regression filtered subsets of first time series data to generate a regression filtered first time series data.