Systems and methods for Wi-Fi sensing are provided. A networking device is configured to transmit a sensing trigger message including information about a plurality of fast sounding sensing signals to be transmitted. The networking device receives the plurality of fast sounding sensing signals transmitted by a sensing transmitter in response to the sensing trigger message within a transmission opportunity. The networking device performs a plurality of sensing measurements on the plurality of fast sounding sensing signals wherein the plurality of sensing measurements include measurements of Doppler frequency information associated with motion in a sensing space.

A depth sensing apparatus configured to generate a depth map of an environment, the apparatus including an audio output device, at least one audio sensor and one or more processing devices configured to cause the audio output device to emit an omnidirectional emitted audio signal, acquire echo signals indicative of reflected audio signals captured by the at least one audio sensors in response to reflection of the emitted audio signal from the environment surrounding the depth sensing apparatus, generate spectrograms using the echo signals and apply the spectrograms to a computational model to generate a depth map, the computational model being trained using reference echo signals and omnidirectional reference depth images.

The present invention comprises: a surface repeater vehicle 200 having a repeater vehicle propulsion means 38 and a repeater vehicle position measurement means 40; an underwater vehicle 100 having a vehicle position estimation means 20; an information transmission line 24 for connecting between the surface repeater vehicle 200 and the underwater vehicle 100, and transmitting acquired information including image information obtained by the underwater vehicle 100; a position setting means 54 for setting a target latitude and target longitude for the surface repeater vehicle 200 and the underwater vehicle 100; and a control means 12, 32 for controlling the surface repeater vehicle 200 and the underwater vehicle 100, and is configured such that, on the basis of the target latitude and target longitude that have been set and an on-water position measured by the repeater vehicle position measurement means 40, the repeater vehicle propulsion means 38 is driven, the position of the surface repeater vehicle 200 is controlled by the control means 12, 32, and on the basis of the target latitude and target longitude that have been set and an underwater position estimated by the vehicle position estimation means 20, the position of the underwater vehicle 100 is controlled by the control means 12, 32, thereby causing the underwater vehicle 100 and the surface repeater vehicle 200 to travel side-by-side while maintaining a vertical positional relationship on the water surface and under water until reaching the target latitude and target longitude.

A method for transmitting data from an ultrasonic sensor to a computer system includes forming a feature vector signal from an electric reception signal; recognizing signal objects in the reception signal and classifying the signal objects according to predetermined signal object classes. The signal objects are forms or sequences of forms. At least one object parameter allocated to the signal object and one symbol for the signal object class are allocated to each signal object, or for each signal object, at least one signal object parameter and a symbol object are determined. The method further includes transmitting the symbol, the at least one signal object parameter, and an error condition of the sensor to the computer system as data of a recognized signal object, wherein the transmission of the error condition is performed with higher priority than the signal object class and the allocated signal object parameter.

A method for transmitting data from an ultrasonic sensor to a computer system includes forming a feature vector signal from an electric reception signal; recognizing signal objects in the reception signal and classifying the signal objects according to predetermined signal object classes. The signal objects are forms or sequences of forms. At least one object parameter allocated to the signal object and one symbol for the signal object class are allocated to each signal object, or for each signal object, at least one signal object parameter and a symbol object are determined. The method further includes transmitting the symbol and the at least one signal object parameter to the computer system as data of a recognized signal object.

A method for transmitting data from an ultrasonic sensor to a computer system includes forming a feature vector signal from an electric reception signal; recognizing signal objects in the reception signal and classifying the signal objects according to predetermined signal object classes. The signal objects are forms or sequences of forms. At least one object parameter allocated to the signal object and one symbol for the signal object class are allocated to each signal object, or for each signal object, at least one signal object parameter and a symbol object are determined. The method further includes determining a chirp value as an allocated signal object parameter. The method further includes transmitting the symbol and the at least one signal object parameter to the computer system as data of a recognized signal object, wherein the at least one signal object parameter includes a signal object parameter indicating the chirp value.

A method for transmitting data from an ultrasonic sensor to a computer system includes forming a feature vector signal from an electric reception signal; recognizing signal objects in the reception signal and classifying the signal objects according to predetermined signal object classes. At least one object parameter allocated to the signal object and one symbol for the signal object class are allocated to each signal object, or for each signal object, at least one signal object parameter and a symbol object are determined. The method further includes transmitting the symbol and the at least one signal object parameter to the computer system as data of a recognized signal object, wherein the transmission of the at least one symbol of the recognized signal object class includes a transmission of a signal object class of a signal object including a predefined temporal sequence of other signal objects.

The invention relates to a method for determining a transmission signal in multiple received signals (6, 8, 11), wherein the method has the following steps: sending a transmission signal (3) receiving a first signal (6), which contains the transmission signal via a first receiver (5) and receiving a second signal (8), which contains the transmission signal via a second receiver (7), characterized in that to determine the transmission signal in the received signals (6, 8), the received signals (6, 8) are compared with one another, wherein the comparison comprises a determination of a time difference and/or phase difference between the first signal (6) and the second signal (8), wherein a transmission signal time period (25), in which the transmission signal is contained in the first signal (6) and the second signal (8), depends on the determined time difference and/or phase angle difference.

The invention relates to a method for determining the signal-to-noise ratio (20) of a target echo (11) from a received signal (UE) received from an ultrasonic sensor (3) of a motor vehicle (1), in which: a transmission signal is transmitted in encoded form, the received signal (UE) is decoded and decoding involves the received signal (UE) being correlated with a reference signal and the correlation provides a correlation signal (UK), and the target echo (11) is detected in the correlation signal (UK), wherein the signal-to-noise ratio (20) is determined by determining a value (21) of the noise in the received signal (UE) on the basis of the correlation signal (UK) and, in so doing, dividing the correlation signal (UK) into a multiplicity of signal segments (17a to 17e) and determining the value (21) of the noise solely on the basis of signal values for that one of the signal segments (17a to 17e) that contains the target echo (11).

A method. In one embodiment there is provided a method in which a direction from a sensor position to a noise source is determined. A coordinate rotation is applied to a first set of signal values, wherein each signal value of the first set of signal values is based on an output of a corresponding component of a three-component particle motion sensor at the sensor position. The applying generates a rotated set of signal values. The coordinate rotation comprises a coordinate rotation transforming a first set of coordinate axes to a second set of coordinate axes, wherein the first set of coordinate axes has each coordinate axis aligned with a corresponding component of the three-component particle motion sensor at the sensor position, and the second set of coordinate axes comprises a first axis pointed in a direction opposite the direction from the sensor position to the noise source.