897results about "Direction finders" patented technology

Provided is a method for tracking a satellite. The method includes: acquiring trajectory information and antenna attitude information of a COTM device; calculating a theoretical pointing angle of an antenna beam for a target satellite based on an orbit parameter of the target satellite and the trajectory information; acquiring an actual pointing angle of the antenna beam by correcting, based on the antenna attitude information, the theoretical pointing angle of the antenna beam; controlling, based on the actual pointing angle of the antenna beam, a receiving phased array antenna to form an antenna beam; acquiring data information of the satellite signal, and correcting an actual pointing angle of the current antenna beam; controlling a transmitting phased array antenna to form an antenna beam based on a corrected actual pointing angle; establishing a communication link and updating ephemeris data of the target satellite.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

A system includes an imager and a processor. The imager has a field of view and being configured to operate in a normal state controlled by a first set of operating parameters for capturing a first sequence of images and in a high-speed state controlled by a second set of operating parameters for capturing a second sequence of images. The processor is configured estimate a travel path for an object based on data extracted from the first sequence of the images or the second sequence of the images; and control the imager in the high-speed state to crop the images in the second sequence of the images containing a region of interest including the object. The processor controls the imager so the second sequence of the images contains the region of interest within the field of view and follows the estimated travel path for the object.

Access control system (1) for buildings (2) with a stationary unit (20) and a mobile unit (10), wherein the mobile unit (10) has a mobile transceiver (11) which is designed to transmit wirelessly and encrypted signals (S) for authentication and authorization of the mobile unit (10) with respect to the stationary unit (20) and for control of the stationary unit (20) by the mobile unit (10) to a stationary transceiver (21) of the stationary unit (20), wherein the stationary unit (20) comprises a control device (22) which is designed to determine a respective position (51 - 57) of the mobile unit (10) relative to the stationary unit (20) from the signals (S) transmitted from the mobile transceiver (11) to the stationary transceiver (21) at predetermined time intervals, to determine a movement path (50) of the mobile unit (10) from the chronologically successively determined positions (51 - 57) of the mobile unit (10) and to determine from the movement path (50) and a predetermined target position a probability with which a function is to be triggered when the mobile unit (10) approaches the target position, wherein the control device (22) is further configured to compare the probability with a predetermined threshold value and to trigger the function if the probability exceeds the threshold value.

Technologies directed to using at least three antennas and Ultra-Wideband (UWB) protocols are described. One method includes sending a first signal to a second wireless device with data that cause it to send a second signal at a plurality of times. The method receives copies of the second signal at a first time via a first pair of antennas and copies of the second signal at a second time via a second pair of antennas. The method determines first and second angle-of-arrival (AoA) values from the copies of the second signals at the first and second times, respectively. The method determines location information of the second wireless device, the location information including an identifier corresponding to a first field of view (FOV) corresponding to the first pair or a second FOV corresponding to the second pair and at least one of the first AoA value or the second AoA value.

Access control system (1) for buildings (2) with a stationary unit (20) and a mobile unit (10), wherein the mobile unit (10) has a mobile transceiver (11) which is designed to wirelessly and encryptedly transmit signals (S) for authentication and authorization of the mobile unit (10) with respect to the stationary unit (20) and for control of the stationary unit (20) by the mobile unit (10) to a stationary transceiver (21) of the stationary unit (20), which has at least a first antenna array (23A) and a second antenna array (23B), wherein the antennas (23) of the respective antenna array (23A, 23B) lie in a common antenna reference plane (E1, E2) and the antenna reference planes (E1, E2) of the antenna arrays (23A, 23B) are tilted relative to one another, wherein the stationary unit (20) comprises a control device (22) which is designed to determine a distance (r) and an angle (Φ) as a position of the mobile unit (10) relative to the stationary unit (20) from signals (S) transmitted from the mobile transceiver (11) to the stationary transceiver (21), so that the position of the mobile unit (10) can be specified as polar coordinates of a polar coordinate system lying in a horizontal plane, in whose coordinate origin the stationary transceiver (21) is arranged, and to control a function when a control command for triggering the function is transmitted to the stationary unit (20) by a mobile unit (10) authenticated and authorized by the stationary unit (20) and / or the position of the mobile unit (10) is within a predetermined access area (30), and wherein the control device (22) is designed to determine a respective reception angle (Φ1, Φ2) specific for the respective antenna array (23A, 23B) from signals (S) transmitted from the mobile transceiver (11) to the stationary transceiver (21) and received by the antenna arrays (23A, 23B), to determine a quadrant of the polar coordinate system in which the position lies from the reception angles (Φ1, Φ2), and to determine the angle (Φ) of the position from the reception angle (Φ1, Φ2), which lies in an angular range predetermined for the respective antenna array (23A, 23B) with a predetermined low measurement error, and the quadrant.

Access control system (1) for buildings (2) with a stationary unit (20) and a mobile unit (10), wherein the mobile unit (10) has a mobile transceiver (11) which is designed to transmit wirelessly and encrypted signals (S) for authentication and authorization of the mobile unit (10) with respect to the stationary unit (20) and for control of the stationary unit (20) by the mobile unit (10) to a stationary transceiver (21) of the stationary unit (20), wherein the stationary unit (20) comprises a control device (22) which is designed to determine a position of the mobile unit (10) relative to the stationary unit (20) from the signals (S) transmitted from the mobile transceiver (11) to the stationary transceiver (21) and to control a function if a control command for triggering the function is transmitted to the stationary unit (20) by a mobile unit (10) authenticated and authorized by the stationary unit (20) and / or the position of the mobile unit (10) is within a predetermined access area (30), and wherein the control device (22) is designed to determine an angle (ϕ) from which the signals (S) were received from the signals (S) transmitted from the mobile transceiver (11) to the stationary transceiver (21), to determine a measured distance (rg) between the stationary transceiver (21) and the mobile transceiver (11) from a signal (S) received at the stationary transceiver (21) from the mobile transceiver (11) and from the measured distance (rg) and a vertical distance (rv) stored as a correction value in the control device (22) between the stationary transceiver (21) and the mobile transceiver (11), to determine a horizontal distance between the stationary transceiver (21) and the mobile transceiver (11) in the polar coordinate system lying in the horizontal plane as a distance (r) from which the signals (S) were received, so that the position of the mobile unit (10) can be specified as polar coordinates of a polar coordinate system lying in a horizontal plane, in whose coordinate origin the stationary transceiver (21) is arranged.

Access control system (1) for buildings (2) with a stationary unit (20) and a mobile unit (10), wherein the mobile unit (10) has a mobile transceiver (11) which is designed to wirelessly and encryptedly transmit signals (S) for authentication and authorization of the mobile unit (10) with respect to the stationary unit (20) and for control of the stationary unit (20) by the mobile unit (10) to a stationary transceiver (21) of the stationary unit (20), which has a first antenna array (23A) and a second antenna array (23B), wherein the stationary unit (20) comprises a control device (22) which is designed to determine from a signal (S) transmitted from the mobile transceiver (11) to the stationary transceiver (21) and at least partially received by the first antenna array (23A) two positions (P10, P11) of the mobile unit (10) relative to the stationary unit (20), of which a first is an actual position (P10) and a second is a first mirrored position (P11), and to determine from the signal (S) transmitted from the mobile transceiver (11) to the stationary transceiver (21) and at least partially received by the second antenna array (23B) two positions (P10, P12) of the mobile unit (10) relative to the stationary unit (20), of which a first is an actual position (P10) and a second is a second mirrored position (P12), and wherein the control device (22) is designed to compare the two positions (P10, P11) determined by means of the first antenna array (23A) with the two positions (P10, P12) determined by means of the second antenna array (23B) and to verify the matching position as the actual position (P10).

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

The present disclosure provides a multi-antenna single-station stereoscopic-arrangement ultra-short baseline lightning location method and related devices. The method includes: adopting a multi-antenna stereoscopic arrangement to form an equilateral pentagon interferometer array without angular error and multiple equilateral triangle interferometer arrays with angular error by combining different numbers of antennas; obtaining a time difference of a same pulse signal between VHF antennas through the combinations of different antennas; using the equilateral pentagon interferometer array to conduct a two-dimensional observation without systematic error; correcting a result of a two-dimensional observation with systematic error that is obtained from the equilateral triangle arrays; and finally, using two-dimensional information obtained by the equilateral pentagon interferometer array as a reference, and performing spatial intersection with the corrected two-dimensional information obtained by multiple equilateral triangle interferometer arrays to obtain three-dimensional information.

The invention discloses a sparse Bayesian direction of arrival estimation method based on subspace compression and dictionary optimization, and belongs to the field of array signal processing. According to the method, the data dimension is reduced through the subspace compression technology, and the noise immunity is improved; signal power and noise power are automatically estimated in combination with a sparse Bayesian model, and dependence on information source number information is avoided; the calculation efficiency and the numerical stability are improved through a support set adaptive pruning strategy; and finally, a dictionary fine tuning mechanism is introduced, direction continuous optimization is realized on the basis of an original discrete grid, an off-grid error is eliminated, and direction-of-arrival estimation with sub-resolution precision is realized. The method is a novel method combining subspace compression, sparse Bayesian inference, adaptive pruning and angle optimization, can give consideration to estimation precision, calculation efficiency and application robustness, and is especially suitable for direction estimation under the complex actual conditions of low signal-to-noise ratio, few snapshots, unknown signal source number and the like.

A deep-sea sound source localization method, a computer device and a storage medium. The method includes: deploying at least two underwater gliders in a designated sea area, so as to respectively record a broadband signal which is emitted by a broadband sound source (1); obtaining a waveform envelope of the signal, and then calculating a waveform envelope of a simulated signal (2); performing cross-correlation analysis on the two waveform envelopes (3); and determining an estimated value of a distance from the sound source, and finally obtaining an estimated position of the sound source by means of a geometrical relationship (3). By means of the method, deployment of a large-depth vertical receiving array is not required. The system has low complexity, and is easy to deploy and operate, which can be applied to a relatively large area. In addition, simple data analysis and calculation are performed without the need for manual parameter adjustment, and target localization can be achieved only by knowing an approximate azimuth of movement of a target. Underwater gliders have good maneuverability and can be deployed according to task requirements, thereby achieving target localization and tracking in a relatively large area.

The invention provides a satellite tracking method, and belongs to the technical field of communication. The satellite tracking method disclosed by the invention comprises the following steps: acquiring track information and antenna attitude information of communication-in-moving equipment in real time; for the target satellite, calculating a theoretical directional angle of an antenna beam according to the orbit parameters of the target satellite and the track information of the communication-in-moving equipment; correcting the theoretical directional angle of the antenna beam according to the antenna attitude information of the communication-in-moving equipment to obtain an actual directional angle of the antenna beam; based on the actual directional angle of the antenna beam, controlling a receiving phased-array antenna in the communication-in-moving equipment to form the antenna beam; in response to the situation that the signal strength of the satellite signal is larger than or equal to a preset value, data information of the received satellite signal is obtained, and the actual directional angle of the current antenna beam is corrected; according to the corrected actual directional angle of the antenna beam, controlling the transmitting phased-array antenna to form the antenna beam; and establishing a communication link, and updating ephemeris data of the target satellite.

The invention discloses a combined orientation and attitude measurement system and method based on navigation array antennas and MEMS inertial navigation, the system comprises satellite navigation array antennas, MEMS inertial navigation, an MEMS inertial navigation attitude resolving module and a combined attitude measurement filter module, one MEMS inertial navigation is integrated in each satellite navigation array antenna, the satellite navigation array antennas are connected with the combined attitude measurement filter module, and the MEMS inertial navigation attitude resolving module is connected with the combined attitude measurement filter module. And the MEMS inertial navigation is connected with the combined attitude measurement filter module through the MEMS inertial navigation attitude resolving module. The MEMS inertial navigation is integrated in the satellite navigation array antenna, on one hand, compared with a traditional combination mode of using optical fiber inertial navigation or laser inertial navigation and a satellite navigation orientation / attitude measurement system, the system size is effectively reduced, the system integration degree is improved, and the system cost is reduced; and on the other hand, the orientation and attitude measurement data of the satellite navigation system and the attitude measurement data of the MEMS inertial navigation system are fused, so that the orientation and attitude measurement precision of the satellite navigation system can be effectively improved, the output frequency of the orientation and attitude data can be improved, and meanwhile, the continuous working capability of the orientation and attitude measurement system can be maintained within a certain time when the satellite navigation signal is unlocked.

The invention discloses an end-to-end intelligent direction of arrival estimation method based on subarray sampling, and belongs to the technical field of wireless communication. A sub-array sampling technology is adopted to replace traditional full-array sampling, and signal processing is completed by using fewer radio frequency links, so that the hardware cost is reduced; an end-to-end learning framework is adopted, so that a network can automatically capture features and rules according to a data set, and excessive dependence on a model is avoided; data features are preliminarily captured through a deep neural network, a pre-estimated value is given, then an iteration process of a maximum likelihood estimation method is converted into a deep expansion network, initialization is performed by using output of the deep neural network, and the effect of the method is improved while convergence is accelerated; a large number of data sets are generated through a sub-array sampling signal mathematical model, the network is trained, and the problem that overfitting is prone to occurring under a small data set is avoided. The method is suitable for the technical field of wireless communication, and realizes direction of arrival estimation with lower complexity and higher accuracy in a low-snapshot scene.

A processor is configured to receive a plurality of sounds signals from a respective plurality of microphones. One or more localization algorithms is applied to the received plurality of sound signals to determine a plurality of source directions. A plurality of tracking directions is determined based on current values for the determined plurality of source directions and previous values for the determined plurality of source directions. An onset detection algorithm is applied to the received plurality of sound signals, and in response to detecting an onset, the processor is configured to determine an onset direction that represents the direction from the microphones to the source of the detected onset. A score is attributed to each of the determined plurality of tracking directions based on any determined onset directions and the one of the determined plurality of tracking directions that has the highest score is provided as a direction-output-signal.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

The present invention provides an image pickup device that recognizes the object that the user is attempting to capture as the subject, tracks the movement of that subject, and can continue tracking the movement of the subject even when the subject leaves the capturing area so that the subject can always be reliably brought into focus. The image pickup device includes a main camera that captures the subject; an EVF that displays the captured image captured by the main camera, a sub-camera that captures the subject using a wider capturing region than the main camera, and a processing unit that extracts the subject from the captured images captured by the main camera and the sub-camera, tracks the extracted subject, and brings the subject into focus when an image of the subject is actually captured. When the subject moves outside of a capturing region of the main camera, the processing unit tracks the subject extracted from the captured image captured by the sub-camera.

The present invention discloses a radio orientation method. A radio positioning device includes a radio receiver (hereinafter referred to as the receiver), an antenna, a signal generating module, an external crystal oscillator and a signal processing module. The receiver transmits the collected radio signal data to the signal processing module through USB, Ethernet, WIFI, Bluetooth or other communication interfaces (hereinafter collectively referred to as communication interfaces). The signal processing module performs data processing based on MUSIC, ESPRIT, WSF, ISM, a new DOA estimation algorithm based on Bayesian compressed sensing learning or other DOA estimation algorithms (hereinafter collectively referred to as DOA estimation algorithms) to obtain the direction of the signal source and complete orientation. The method disclosed by the present invention improves the efficiency of radio orientation, visualizes the orientation results, simplifies the structure of the orientation device, and can be applied to a variety of working conditions, which is a technical advancement in this field.

An electronic device includes a speaker, a sensor, a communication circuit, a processor, and a memory to store instructions. The instructions, when executed by the processor, cause a wireless audio device to, while outputting a signal for reducing an external sound through the speaker, identify, using the communication circuit, an external electronic device, identify, using the sensor, a conversation responsive to a location of the external electronic device satisfying a specified condition, responsive to identifying the conversation, stop an output of the signal for reducing the external sound for a first period of time, and responsive to identifying a specified keyword included in the conversation, prolong stopping the output of the signal for reducing the external sound for a second period of time.

The invention relates to the technical field of communication interaction, in particular to an angle measurement method and device and a storage medium. The angle measurement method applied to first reference equipment comprises the following steps: receiving a plurality of measurement signals sent by target equipment; respectively determining a first phase measurement value of each received measurement signal; receiving a plurality of second phase measurement values sent by a second reference device; based on the plurality of first phase measurement values and the plurality of second phase measurement values, determining distance difference values between the target equipment and the first reference equipment and between the target equipment and the second reference equipment; and determining deflection angles between the target equipment and the first reference equipment and between the target equipment and the second reference equipment based on the baseline length and the distance difference between the first reference equipment and the second reference equipment. According to the invention, the air interface occupation time of signal transmission can be reduced, the test time delay can be shortened, the requirement on the measurement precision can be effectively reduced, and the process of determining the angle information of the target equipment is more convenient and efficient.

The invention provides an imaging equipment calibration device and method, imaging equipment and electronic equipment, and relates to the field of imaging equipment calibration. The calibration device of the imaging equipment comprises a deviation analysis module and a calibration module, and the deviation analysis module is used for obtaining a deviation value between a current position and an ideal position of a rotating shaft of the imaging equipment according to at least three celestial body images at different spatial positions; and the calibration module is used for calibrating the imaging equipment based on the deviation value. According to the calibration device of the imaging equipment provided by the embodiment of the invention, the autonomy of equipment calibration can be effectively improved, and for the user side, the calibration process is greatly simplified, and the calibration efficiency, accuracy and reliability are improved.

The invention discloses a low-redundancy high-order direction finding method and system based on co-prime characteristics and a computer storage medium, and the method comprises the steps: receiving signals from a plurality of signal sources through employing a low-redundancy array obtained through improvement based on a co-prime array, and obtaining a received signal; calculating a fourth-order cumulant matrix of the received signal according to the received signal; obtaining a covariance matrix according to the fourth-order cumulant matrix; according to the covariance matrix, calculating to obtain a characteristic value and a characteristic vector of the covariance matrix; dividing the feature vector into a signal subspace and a noise subspace according to the size of the feature value; constructing a spectral function according to the projection of the steering vector on the noise subspace; and searching peak values of the spectral function in all possible directions, and determining the direction of the signal source. According to the low-redundancy array obtained based on improvement of the co-prime array, on the basis that the number of receiving array elements is reduced, the number of estimated signal sources is increased, the fourth-order cumulant is adopted, and the positioning precision in a non-Gaussian noise environment can be improved.

The invention relates to a method for obtaining a position of a sound source relative to a dedicated reference point. A first and a plurality of second sound signals are recorded which are synchronized in time. The position can be obtained by applying an estimated filter to a correlated signal derived by correlation of the first sound signal with at least one of the plurality of second sound signals in the frequency domain. Two timing values are derived in the at least one filtered and correlated signal exceeding a dedicated threshold in the time domain. Then the distance between the dedicated reference point and the sound source based on the respective obtained first timing value and second timing value.

The invention relates to the field of terminal control, in particular to an angle measurement method and device and a storage medium. The angle measurement method provided by the invention is applied to first reference equipment, and comprises the following steps: based on communication connection between target equipment and second reference equipment, determining a plurality of phase measurement values of signal interaction between the target equipment and each reference equipment under a plurality of signal frequencies; based on the plurality of phase measurement values, respectively determining a signal phase change estimation value corresponding to each signal frequency, and obtaining a plurality of signal phase change estimation values; determining a distance difference between the target device and the two reference devices based on the plurality of signal phase change estimated values; and determining deflection angles between the target equipment and the two pieces of reference equipment based on the baseline length and the distance difference between the two pieces of reference equipment. The purpose of high-precision angle measurement can be achieved under the condition that other measurement sensors do not need to be added.

In an embodiment, a method includes: receiving ambient sound; determining if the ambient sound includes a siren; in accordance with determining that the ambient sound includes a siren, determining a first location associated with the siren; receiving a camera image; determining if the camera image includes a flashing light; in accordance with determining that the camera image includes a flashing light, determining a second location associated with the flashing light; 3D data; determining if the 3D data includes an object; in accordance with determining that the 3D data includes an object, determining a third location associated with the object; determining a presence of an emergency vehicle based on the siren, detected flashing light and detected object; determining an estimated location of the emergency vehicle based on the first, second and third locations; and initiating an action related to the vehicle based on the determined presence and location.

This electronic device may comprise: a memory for storing instructions; a display; a communication circuit; and at least one processor. When executed individually or collectively by the at least one processor, the instructions can cause the electronic device to: display, on the basis of identifying an azimuth angle of the electronic device with respect to a satellite outside a first range, a first screen for adjusting the azimuth angle to be located within the first range; while the first screen is displayed, display, on the basis that the azimuth angle outside the first range is changed to be within the first range, a second screen, which is changed from the first screen and guides the electronic device to be fixed; and, while the second screen is displayed, display, on the basis of identifying an elevation angle of the electronic device with respect to the satellite outside a second range, a third screen, which is changed from the second screen and is for adjusting the elevation angle to be located within the second range.

The invention relates to the technical field of array signal processing, in particular to an out-of-lattice DOA estimation method and system based on deep learning under array errors, and the method comprises the steps: receiving a narrowband signal sent by a narrowband target through an observation array, obtaining a corresponding array receiving signal, and obtaining a covariance matrix based on the array receiving signal; and inputting the array receiving signal and the covariance matrix into a pre-trained DOA estimation model, and obtaining a DOA estimation result of the narrowband target by using the DOA estimation model, the DOA estimation model comprises a first feature extraction network used for extracting array signal features, a second feature extraction network used for extracting covariance matrix features, and a full-connection network used for fusing the array signal features and the covariance matrix features and obtaining a narrowband target DOA estimation result. According to the method, the influence of the array error on the DOA estimation performance can be effectively suppressed, and the DOA estimation effect of the narrowband target is improved.

The present invention relates to a method for obtaining a position of a sound source relative to a dedicated reference point, where a first audio signal and a number of second audio signals are recorded synchronously in time. The position can be obtained by applying an estimated filter to a correlation signal derived by correlation of the first audio signal with at least one of the number of second audio signals in the frequency domain. Two timing values ​​are derived for at least one filtered correlation signal that exceeds a dedicated threshold in the time domain. Then, a distance between the dedicated reference point and the sound source is based on each obtained first and second timing value.

The invention relates to a method for receiving and analyzing received signals. The method is characterized by the steps of: receiving each received signal by means of a respective receiving antenna of at least two receiving antennas (A); allocating a respective receiving chain of at least two receiving chains (EK) to each receiving antenna of the receiving antennas and allowing a signal path between each receiving antenna of the receiving antennas and the receiving chain allocated to the respective receiving antenna by switching a selection circuit (SS); and ascertaining a phase difference between the received signals.