91 results about "Antenna calibration" patented technology

The invention relates to the related technical field of antenna calibration, in particular to a phased-array antenna calibration method and system, and the method comprises the steps: building a three-dimensional near-field calibration reference, and simulating an initial error matrix; wave beam pointing deviation is determined through grouped excitation, and space angle error components are matched; generating a dynamic calibration weight matrix; and deploying distributed calibration nodes, and carrying out mutual coupling effect bias measurement and calibration decision. The technical problems that a static compensation coefficient is difficult to adapt to a dynamic working condition, thermal drift, mechanical deformation and electromagnetic interference cannot be effectively separated, and the stability of a communication link is influenced are solved, an initial error matrix is prepared by establishing a three-dimensional near-field calibration reference and combining phase difference and amplitude errors, collaborative optimization of grouped excitation and angle errors is carried out, and the stability of the communication link is improved. And in combination with the least square method and the deep separable convolutional neural network, environment disturbance is effectively separated and dynamically compensated, distributed calibration nodes are deployed, the mutual coupling calibration efficiency between array elements is improved, and the technical effect of influencing the stability of a communication link is further guaranteed.

Systems and methods are disclosed that relate to Key Performance Indicator (KPI)-driven alarm threshold optimization using machine learning. In one embodiment, a computer-implemented method comprises obtaining network-level KPI data for a network and radio log data for one or more radio systems in the network. The KPI data comprises KPI values for one or more network-level KPIs, and the radio log data comprises a number of faulty or uncalibrated antenna branches in the radio system and cell or user beamforming weights. The method further comprises pre-processing the KPI data and the radio log data, labeling the pre-processed KPI data as degraded or non-degraded, and training, with the labeled KPI data and the pre-processed radio log data, a fault classifier Machine Learning (ML) model to output a value(s) that represent a probability that the KPI(s) will be degraded for a given input feature set.

The invention relates to the technical field of antenna calibration, in particular to an automatic photoelectric marker calibration device and method based on space vector measurement, and the device comprises a tripod, an azimuth pitching two-dimensional precision turntable, a laser range finder, a monitoring camera and an upper computer. The azimuth pitching two-dimensional precision rotary table is fixedly installed on the tripod, the laser range finder is fixedly installed on the azimuth pitching two-dimensional precision rotary table, and the upper computer is electrically connected with the azimuth pitching two-dimensional precision rotary table, the laser range finder and the monitoring camera; the azimuth pitching two-dimensional precision turntable is a two-dimensional precision turntable driven by an ultrasonic motor; the laser range finder is a telescope type one-dimensional laser range finder; the monitoring camera is a rotatable pan-tilt camera; the upper computer is a computer; the problems of low efficiency and poor precision of large-spacing manual operation in the existing photoelectric mark calibration technology are solved.

The invention discloses a method for calculating a channel time delay compensation value of a large-aperture antenna adopting near-field coupling, and the method comprises the steps: setting a calibration antenna on a main reflection surface of each antenna in an antenna array, and building a downlink channel time delay test loop and an uplink channel time delay test loop of each antenna in the antenna array; obtaining a downlink loop time delay and an uplink loop time delay of each antenna in the antenna array according to the downlink channel time delay test loop and the uplink channel time delay test loop of each antenna in the antenna array; obtaining a channel time delay compensation value of each antenna in the antenna array according to the downlink loop time delay and the uplink loop time delay of each antenna in the antenna array; the channel time delay compensation value comprises relative downlink channel time delay and relative uplink channel time delay. According to the invention, a far-field calibration tower of an antenna array system does not need to be established, the signal delay requirement of the antenna calibration channel can be met, and the system design is simplified.

The utility model discloses a high-precision waveguide antenna calibration device which comprises an analyzer and a connecting element which are used in cooperation with each other. One side of the analyzer is connected with a containing bin in a sliding manner, and the containing bin is used for containing a connecting element; the connecting element comprises a plurality of waveguide wires matched with the analyzer, a plurality of calibration pieces matched with the waveguide wires, and an auxiliary connecting piece; the two ends of the waveguide wire are fixedly connected with a first connector corresponding to a wiring port of the analyzer and a second connector corresponding to the calibration piece respectively, and the calibration piece always tends to get close to the second connector through the auxiliary connecting piece. According to the utility model, the analyzer and the connecting element are placed together through the design of the accommodating bin, the probability that the connecting element is lost is reduced, meanwhile, the connecting element is also internally provided with the auxiliary connecting piece, the tightness and firmness of the connection between the calibration piece and the waveguide antenna are reinforced, the calibration accuracy of the analyzer through the calibration piece is ensured, and the calibration accuracy is improved. Therefore, the accuracy of antenna test calibration is ensured.

1. A phased antenna array calibration station, comprising: an enclosure including: a rectangular first internal room including at least one exterior door, a power supply, a cooling unit, a control device configured to control power, cooling, and testing within the second internal room, and an antenna under test (AUT); and a rectangular second internal room including at least one interior door abutting the first internal room, an opening in one wall of the second internal room, radio frequency (RF) absorbing material covering all interior surfaces of the second internal room, and at least one movable electromagnetic interference (EMI) shield configured to form an EMI seal around the opening and active elements of the AUT aligned with the opening; and a support fixture configured to support the AUT and align the active elements of the AUT with the opening in the second internal room including a cooling and electronics unit (CEU) configured to cool the AUT and operate the AUT.

The application relates to an antenna calibration method and device, comprising the following steps: selecting qualified visible satellites from GNSS satellites based on carrier phase observations, calculating unit observation vectors of the visible satellites, and determining reference satellites of each epoch according to the unit observation vectors of all the visible satellites; constructing a set of triple difference phase center error measurements; constructing a spherical harmonic function fitting model according to the set of triple difference phase center error measurements, and obtaining a phase pattern of the antenna to be calibrated after solving. The application is suitable for large-scale calibration of low-cost antennas. The carrier phase ambiguity is eliminated, the complex ambiguity resolution and verification process is avoided, the complexity of the phase center error calibration is reduced, the influence of triple difference noise on the fitting accuracy of the phase pattern is reduced, and the accuracy of the antenna calibration result is improved. The application also relates to an equipment and a storage medium.

An antenna calibration system and method use a transmitter antenna array and a receiver antenna array. Calibration automatically initiates in response to a trigger condition. Each receiver antenna in the receiver antenna array receives frequency-modulated signals from the transmitter antenna array. Optionally, the transmitter antenna array transmits signals of increasing frequency ("up chirps") and / or signals of decreasing frequency ("down chirps"). The frequency-modulated signals are processed through matched filters to determine filter responses. The phase differences for each receiver antenna are calculated based on the filter responses. Calibration coefficients for each receiver antenna are generated based on the calculated phase differences. The phase of signals received from the receiver antennae are then adjusted using the respective calibration coefficients.

The application discloses a traffic monitoring antenna receiving channel phase and array error joint calibration method, comprising the following steps: S1) establishing a TCAS antenna array model; S2) establishing a TCAS antenna far-field antenna calibration model; S3) moving a radiation source to a preset mark position to emit a calibration signal, so that each receiving channel antenna of the TCAS receives the calibration signal; S4) repeating S3 until the radiation source traverses all preset mark positions; S5) performing FFT processing on the received signal after mixing to obtain a received signal spectrum; S6) searching for a spectrum peak of the received signal spectrum to calculate a phase difference between a reference channel and a channel to be calibrated; S7) using a least square method to solve a fixed phase difference and an installation error; and S8) compensating for the channel phase by using the solving result to complete the calibration. The application can comprehensively calibrate the influence of the channel fixed phase difference and the antenna array element position coordinate error, and further improves the accuracy of the antenna channel calibration.

A tomographic imaging system including an extended source antenna, which produces a wavefield scattered by the internal structure of an object. A processor recursively reconstructs the internal structure by processing a current image of the internal structure of the object with a neural network operator trained to synthesize measurements of a point-source antenna corresponding to a wavefield scattered by the current image of the internal structure of the object, processing the synthesized measurements of the point-source antenna with a calibration neural network to estimate measurements of the extended-source antenna, and updating the current image of the internal structure of the object based on a difference between the measurements of the extended-source antenna and the estimation of the measurements produced by the calibration neural network.

The present invention discloses a GNSS dual-antenna calibration method and system, wherein a GNSS dual-antenna calibration method includes: determining a coarsely calibrated installation deflection between the dual antenna and the longitudinal axis of the vehicle body through the difference between the track angle and the dual-antenna heading angle in the GNSS positioning data; compensating the dual-antenna heading angle using the coarsely calibrated installation deflection to obtain a compensated dual-antenna heading angle; and obtaining a precisely calibrated dual-antenna orientation through the heading angle of the vehicle body and the compensated dual-antenna heading angle. In an embodiment of the present application, a coarsely calibrated installation deflection is first obtained using the track angle and the dual-antenna heading angle, and the compensated dual-antenna heading angle is obtained using the coarsely calibrated installation deflection. The compensated dual-antenna heading angle is then used in subsequent calculations, and a more accurate precisely calibrated dual-antenna orientation can be obtained through the vehicle body heading angle and the compensated dual-antenna heading angle.

The present application relates to a kind of multi-channel radar system external calibration method, comprising the following steps: adapter tool is fixedly connected on the calibration surface of radar antenna, the plane position of radar antenna calibration surface and adapter tool calibration surface is measured by measuring instrument, the inherent relative position relationship of both is solved;Radar antenna and adapter tool are combined and loaded into cabin;The position of adapter tool calibration surface and external calibration source is measured respectively using measuring instrument, the relative position of both is solved, and external calibration source position is adjusted until external calibration source is located at the mechanical zero of antenna;The inter-channel phase difference under the external calibration and internal calibration of radar receiver is analyzed, and the insertion phase is solved.The present application realizes the measurable of antenna calibration surface by the conversion of adapter tool, thereby carries out external calibration to multi-channel radar system, and improves the measurement accuracy of radar system.

The application provides an antenna calibration method, a network side device, an apparatus and a storage medium. The method comprises the following steps: determining a channel error type according to a precoding matrix indicator set sent by a target terminal, wherein the channel error type comprises a wideband error and a narrowband error; and performing antenna calibration according to the channel error type. The application determines the channel error type according to the precoding matrix indicator set, and then performs antenna calibration according to the channel error type, thereby improving the accuracy of antenna calibration.

According to one example, a massive multiple-input multiple-output (mMIMO) system configured for beamforming control may include an open radio access network (O-RU) radio unit with a processing device configured to: compute one or more predictive channel estimates, beamforming estimates, or antenna calibrations; calculate, based on an objective function having one or more of the predictive channel estimate, beamforming estimate, or antenna calibration as inputs, a power level for a data stream connected to a transmit antenna path, selecting the power level for the data stream to facilitate equal power distribution over a plurality of transmit antenna paths; and set the power level for the data stream connected to the transmit antenna path.

The invention discloses a UWB positioning device based on a six-unit array antenna, and relates to the technical field of wireless positioning, the UWB positioning device comprises a lower base, an antenna calibration plate, six miniaturized omnidirectional antennas and an upper cover protective cover, the lower base is connected with a network power line; the lower base is internally provided with an MCU algorithm processing module, a UWB positioning chip module, a power supply module and a network communication module, according to the design, through innovative antenna layout, an optimized signal processing algorithm and a built-in antenna calibration board, the problems that in the prior art, the deployment cost of multiple base stations is high, the positioning precision of a single base station is low, and the anti-interference capability is weak are solved; the single-base-station high-precision two-dimensional or three-dimensional positioning method is suitable for indoor and outdoor high-precision positioning scenes, and has the advantages of high positioning precision, strong anti-interference capability, long coverage distance and the like.

The present application discloses an antenna calibration method and system for the field of communication technology. The system includes: a baseband processing unit, a radio frequency remote unit, an antenna array, and a coupling antenna; the antenna array is configured to send a radio frequency calibration signal sent by the baseband processing unit to a wireless network; or to receive a radio frequency calibration signal; the radio frequency remote unit is configured to provide multiple transmission channels; the multiple transmission channels correspond to the multiple transmission ports; the coupling antenna is configured to receive the radio frequency calibration signal sent by the baseband processing unit in the wireless network and transmit a coupling signal corresponding to the radio frequency calibration signal to the baseband processing unit; or to send the radio frequency calibration signal to the wireless network; the baseband processing unit is configured to calibrate multiple baseband signals to be transmitted corresponding to the multiple transmission channels based on the difference between the radio frequency calibration signal and the coupling signal.

The present application relates to the technical field of array antenna calibration information processing, and provides an array antenna calibration information processing method and system based on a navigation signal, which comprises the following steps: based on platform motion information and environmental geometry information, a signal feature dictionary is constructed by real-time identification of the direct path feature and the reflected path feature of the digitized navigation signal; based on the signal feature dictionary, the direct signal component and the reflected signal component are identified; when the quality of the direct signal component meets a preset condition, the inter-channel phase difference is extracted from the direct signal component; when the quality of the direct signal component does not meet the preset condition, the reflected signal component is compensated to construct a reference signal, and the inter-channel phase difference is extracted again; based on the inter-channel phase difference, the amplitude and phase calibration parameters of each channel of the array antenna are solved, and the amplitude and phase calibration parameters are applied to the antenna control loop. The present application has the effect of improving the accuracy of array antenna calibration information processing.

The present application discloses an antenna calibration method, device, storage medium and electronic device. It includes: obtaining the downtilt angle and azimuth angle of the target antenna, and determining multiple first marker bars and multiple second marker bars to be observed based on the azimuth angle and downtilt angle; obtaining the coverage range and installation point of the target antenna, and determining multiple observation points based on the coverage range and installation point; at multiple observation points, detecting the downtilt angle and azimuth angle of the target antenna respectively based on the multiple first marker bars and the multiple second marker bars, obtaining the detection results, and calibrating the downtilt angle and azimuth angle of the target antenna based on the detection results. The present application solves the technical problem in the related art that when installing a spherical antenna, the azimuth angle and downtilt angle of the spherical antenna are difficult to calibrate to the preset installation standard during the installation process, resulting in poor coverage of the spherical antenna.

The invention provides a method and a device for measuring calibration parameters of an array antenna. The method comprises the following steps of: performing grid division on a measurement space of the array antenna; determining the satellite density in each elevation angle layer of the measurement space after grid division in the current rotation period, and determining the weight coefficient of each elevation angle layer in the current rotation period based on the satellite density; wherein the weight coefficient is used for representing the satellite coverage priority of each elevation angle layer; based on the weight coefficient, determining a coverage score of each candidate angle; wherein the coverage score of the candidate angle is used for representing satellite coverage earnings after rotation of the array antenna according to the candidate angle in the current rotation period; determining a target rotation angle of the current rotation period based on the coverage score of each candidate angle; and determining calibration parameters of the array antenna based on the satellite signals collected by the array antenna at the target rotation angle of each rotation period. Through the method, the measurement speed of the calibration parameter of the array antenna can be improved.

The invention discloses an antenna calibration method, device and system and a storage medium, and relates to the technical field of antennas. According to the specific implementation scheme, the antenna calibration system comprises a main calibration network and a plurality of sub calibration networks; the plurality of sub-calibration networks are in one-to-one correspondence with a plurality of sub-arrays in the active antenna array and are used for performing in-array calibration processing on the plurality of sub-arrays; the main calibration network is connected with the plurality of sub-calibration networks and is used for performing inter-array calibration processing on the plurality of sub-arrays; through the arrangement of the plurality of sub-calibration networks and the main calibration network, the plurality of sub-arrays in the antenna array can be calibrated in parallel under the condition that the number of transceiving channels in the antenna array is too large, so that the calibration time is shortened, the transceiving channels in the antenna array are prevented from being occupied for a long time, and the working efficiency of the antenna array is improved; the communication performance of the antenna array is ensured, and the normal communication service is prevented from being influenced.

The invention discloses a large phased-array antenna calibration test system, which belongs to the technical field of antenna microwaves and comprises a scanning frame servo system, a first circulator, a second circulator, a first vector network, a second vector network, a signal generator, an antenna upper computer, a servo computer and a plurality of matched cables. The scanning frame servo system is connected with the first vector network and the second vector network through the first circulator and the second circulator; the signal generator receives an instruction of the antenna upper computer, generates a differential signal for antenna control, and provides TTL signals for the first vector network and the second vector network; the antenna upper computer is connected with the servo computer; the radar antenna pulse working system is utilized, receiving and transmitting calibration is completed through one-time testing, the testing efficiency is doubled, and the larger the array plane scale is, the more obvious the effect is.

The present disclosure provides a method (400) for facilitating Antenna Calibration, AC. The method (400) includes: identifying (410) a leakage signal from a signal received at an AC signal receiver and resulted from a reference signal originated from an AC signal transmitter passing through an AC signal path from the AC signal transmitter to the AC signal receiver; and cancelling (420) an influence of the leakage signal on an AC process.

The application relates to an anti-interference multi-beam phased array antenna calibration method, wherein a novel spread spectrum signal system is adopted in the calibration source signal system for correction, which is different from the traditional single carrier signal system; a spread spectrum calibration signal is generated by a calibration processing device, is transmitted through a beacon antenna located in the near field of the phased array, is received by a certain TR channel of the phased array antenna, is finally looped back to the calibration processing device, is down-converted to an intermediate frequency, is AD sampled and captured, and then amplitude and phase measurement is carried out and the measurement result is transmitted to a wave control machine; the wave control machine carries out data processing on the measured signal amplitude and phase to complete amplitude and phase correction. The whole has strong anti-coupling interference and space environment interference capability, the interference signal ratio can be realized by adjusting the non-coherent accumulation times, the amplitude and phase correction of the multi-beam phased array antenna is completed under strong interference, the realization principle is simple, no additional hardware resource is needed, the signal can be quickly captured and converged, and the amplitude and phase correction result can be calculated.

The utility model discloses a transmitting antenna calibration device and system, and relates to the field of transmitting antenna testing. In the device, a probe clamping part is detachably connected with a first supporting part in the height direction of the first supporting part; the first supporting component is detachably connected with the supporting base, and the first supporting component is perpendicular to the supporting base during connection; the probe clamping part is used for clamping a field intensity probe; the transmission assembly is detachably connected with the supporting base, and the transmission assembly is in contact with the bottom of the first supporting part under the support of the supporting base during connection; the control module is connected with the transmission assembly and used for controlling the transmission assembly to reciprocate in the length direction of the supporting base so as to drive the first supporting component and the field intensity probe to move synchronously. According to the scheme, all the parts are detachably connected, so that the whole device can be carried to all work sites according to requirements, the transmitting antenna to be tested is accurately calibrated and tested, and practical application is facilitated.

The invention discloses an antenna channel time delay calibration method based on feed source port coupling, and the method comprises the steps: setting a calibration antenna at an antenna feed source port in an antenna array, and building an uplink channel time delay test loop and a downlink channel time delay test loop; obtaining an uplink channel delay inequality and a downlink channel delay inequality of each antenna in the antenna array from the antenna feed source port to the calibration antenna; measuring the signal time delay between the reflecting surfaces of the antennas in the antenna array; and obtaining the uplink channel time delay and the downlink channel time delay of each antenna in the antenna array according to the uplink channel time delay inequality and the downlink channel time delay inequality of each antenna in the antenna array and the signal time delay between the reflecting surfaces. According to the invention, a far-field calibration tower of an antenna array system does not need to be established, the signal delay requirement of the antenna calibration channel can be met, and the system design is simplified.

The utility model provides a kind of omni-directional radiation antenna calibration device for OTA test, including installation mechanism, installation mechanism below is equipped with mounting disc, mounting disc is rotatably connected with installation mechanism, mounting disc bottom surface is equipped with assembly mechanism, the inside of assembly mechanism is equipped with the adjusting mechanism of adjusting antenna;The adjusting mechanism includes assembly seat, electric push rod, connecting seat and adjusting block, assembly seat is located in the inside of assembly mechanism, the inside of assembly seat is equipped with connecting block, connecting block bottom surface is equipped with electric push rod, electric push rod is rotatably connected with assembly seat, electric push rod bottom end is equipped with connecting seat, the inside of connecting seat is equipped with adjusting block, adjusting block side surface is equipped with antenna main body.The utility model is adjusted to antenna main body by adjusting mechanism and is multidirectional to the longitudinal height and the angle of itself, cooperate the rotation of mounting disc below installation mechanism, so that antenna main body can be realized comprehensive multidirectional position calibration when testing, and then it is favorable to improve the applicable scope that the device calibrates antenna main body.

The application is suitable for the technical field of phased array antenna calibration, and provides a phased array antenna calibration method, device, medium and antenna system.The method comprises the following steps: acquiring network level information of a phased array antenna; acquiring amplitude ratio of field strength amplitude of each antenna unit relative to field strength amplitude of a reference array field, phase difference value; acquiring a to-be-calibrated signal port and the like; and finally obtaining phase and amplitude adjustment amount of the to-be-calibrated signal port.The application has the advantages that the array overall amplitude consistency can be effectively optimized, the array overall amplitude consistency is improved, the array synthesized field quality is improved, the influence of single antenna unit measurement error or local anomaly on the overall calibration result is effectively reduced, and the stability of the calibration result is improved.

The present application belongs to the technical field of calibration of phased array radar, and relates to a two-stage grouping asynchronous rotating electric vector radar array antenna calibration method, and the specific process is as follows: an attenuator and a phase shifter are configured to each element channel of the array antenna to be measured, and signals received by all channels are synthesized through a power divider; the phased array radar to be measured is equally grouped by channel number in a first stage; a grouping matrix is constructed based on a Hadamard matrix, and the channels grouped in the first stage are divided into rotating groups and fixed groups according to elements in the grouping matrix; a phase shift matrix for phase shift measurement of each row in different grouping matrices is constructed based on a discrete Fourier transform matrix with an order of N, and phase shift is performed; linear equations are constructed according to measurement results and solved, and the ambiguity coefficient, the amplitude of each channel and the phase difference between each channel are obtained, and each field normalization amplitude and phase is solved; amplitude and phase compensation of the channels is completed based on each field normalization amplitude and phase, and finally the amplitude and phase of all channels are consistent.

This invention discloses a calibration method, calibration system, equipment, and medium for phased array antenna channels, comprising: when the distance between the phased array antenna and the horn antenna meets the far-field condition, activating at least one transmit channel of the phased array antenna to transmit a first beam signal to the horn antenna, and deactivating other transmit channels; calculating multiple transmit calibration parameters based on the first beam signal received by the horn antenna; calibrating the corresponding transmit channels based on the multiple transmit calibration parameters; after all transmit channels of the phased array antenna have been calibrated, activating at least one receive channel of the phased array antenna to receive a second beam signal transmitted by the horn antenna, and deactivating other receive channels; calculating multiple receive calibration parameters based on the second beam signal received by the phased array antenna; and calibrating the corresponding receive channels based on the multiple receive calibration parameters. This invention improves the efficiency and accuracy of phased array antenna calibration and reduces calibration costs.