124 results about "Reference antenna" patented technology

Provided are a near field positioning method and a communication device, the method comprising: a terminal device measuring N reference signals corresponding to N beams from a network device to obtain RSRP corresponding to the N beams, N being a positive integer; the terminal device determines the position of the terminal device according to the RSRP corresponding to the N beams and the distance and angle corresponding to the N beams, and the distance and angle corresponding to any beam are the distance and angle of the center position of the beam relative to a reference antenna of the network device. According to the method, how to position the terminal equipment in a near field communication range is determined.

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Specifically, the present disclosure relates to an apparatus and method for channel state information (CSI) reporting in multiple transmit receive point (TRP) operation in a wireless network. A method performed by a user equipment (UE) includes: receiving information about CSI reports associated with Ntrp antenna port groups, where Ntrpgt; 1; and determining, based on the information, a CSI report associated with N < = Ntrp antenna port groups, where N belongs to {2, 3,..., Ntrp}, where the CSI report comprises a first indicator indicating, for each layer l = 1,..., v, an index of Mv vectors comprising a column of a frequency domain (FD) basis matrix Wf, l, where v > = 1 is a rank value; and a second indicator indicating an index of the FD offset value # imgabs0 # for each of the N antenna port groups, where r belongs to {1,..., N}, r is not equal to r *, and r * is an index of the reference antenna port group. The method also includes transmitting a CSI report including the first indicator and the second indicator.

The present disclosure relates to a communication technique for converging IoT technology with a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The present disclosure may be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, health care, digital education, retail business, a security and safety-related service, etc.) on the basis of 5G communication technology and IoT-related technology. In addition, the present disclosure relates to a method and device for carrying out cooperative communication in a wireless communication system. A method of a terminal of a communication system, according to one embodiment of the present disclosure, comprises the steps of: receiving, from a base station associated with a first cell, cell configuration information including a TCI configuration and a QCL configuration; checking a QCL reference antenna port on the basis of the cell configuration information; and receiving a signal from the base station on the basis of a QCL relationship with the checked QCL reference antenna port, wherein the QCL reference antenna port may be checked on the basis of a CSI-RS or SSB associated with a second cell.

The invention relates to a GNSS relative differential positioning method for positioning a mobile antenna with respect to a reference antenna by computing phase differences between the signals received by these two antennas and originating from a plurality of satellites, comprising: processing the digitized signal (Src1) received by the reference antenna in a first loop (10) and processing the digitized signal (Src2) received by the mobile antenna in a second loop (20), each of the loops being subjected to the signal from frequency demodulation, code-demultiplexing, correlation and discriminant-computing operations, the first loop estimating the phase of the signal used to adjust the carrier frequency in the frequency demodulation for each of the loops, the second loop computing the phase difference between the two signals; and estimating the position of the mobile antenna based on the computed phase difference.

The invention discloses a phase-free antenna measurement method, a phase-free antenna measurement system and a storage medium. The phase-free antenna measurement method comprises the following steps: constructing a measurement system comprising an antenna to be measured, a measurement probe, a fixed auxiliary reference antenna and software defined radio; the probe is controlled to move and sample on the scanning plane, and the SDR synchronously collects receiving signals of the probe and the reference antenna; based on the frequency domain transformation result of the two paths of signals, the radiation field amplitude of each sampling point and the relative phase relative to the reference antenna are directly calculated through non-iterative operation, so that complete complex electric field distribution on the scanning plane is reconstructed; and finally, obtaining a far-field directional diagram through near-field-far-field transformation. The fixed reference antenna is introduced to serve as a phase reference, synchronous acquisition and direct calculation are achieved in combination with the SDR, the antenna radiation field can be rapidly and accurately recovered without direct phase measurement or complex iteration in the single scanning plane and single scanning process, and the method has the advantages of being simple in system, high in measurement efficiency and high in signal drift resistance.

Apparatuses and methods for calibration reporting. A method performed by a UE includes receiving information about a CSI report. The information indicates NTRP>1 downlink reference signals (DL RSs), an associated sounding reference signal (SRS) resource in an SRS resource set from Nset≥1 SRS resource sets, and PSRS≥1 reference antenna ports from x SRS ports of the associated SRS resource. The method further includes transmitting, based on the information, the associated SRS using the PSRS reference antenna ports, receiving, based on the information, the NTRP DL RSs using the PSRS reference antenna ports for calibration-related measurement, determining, based on the information and the calibration-related measurement, calibration-related information (CLI), and transmitting the CSI report including the CLI.

Provided in the present application are a near-field positioning method, and a communication apparatus. The method comprises: a terminal device measuring N reference signals which correspond to N beams from a network device, so as to acquire RSRPs corresponding to the N beams, wherein N is a positive integer; and the terminal device determining the position of the terminal device on the basis of the RSRPs corresponding to the N beams and distances and angles corresponding to the N beams, wherein the distance and angle corresponding to any beam are the distance and angle of the central position of the beam relative to a reference antenna of the network device. The method defines how to position a terminal device within a near-field communication range.

The invention discloses a method and system for calibrating relative signal time delay of a link of a deep space large-aperture antenna, and the method comprises the steps: building a coordinate system based on a to-be-calibrated antenna and a reference antenna, and determining a signal phase difference caused by the spatial path difference between the to-be-calibrated antenna and the reference antenna in an antenna array and a satellite; obtaining a downlink signal relative phase difference and an uplink signal relative phase difference of the antenna to be calibrated relative to the reference antenna in the antenna array based on a signal phase difference caused by a space path difference between the antenna to be calibrated and the satellite and between the reference antenna and the satellite; obtaining a relative signal time delay value of a link of the antenna; and according to the relative signal time delay value of the own link of the antenna, compensating the own link of the antenna to be calibrated so as to realize the signal time delay of the own uplink and downlink of each antenna of the calibration array. The method is simple and reliable, and signal delay calibration of an uplink and a downlink of a deep-space large-aperture antenna can be conveniently realized.

Apparatuses and methods for channel state information (CSI) reporting in multi-transmission reception point (TRP) operations in wireless networks. A method performed by a user equipment (UE) includes receiving information about a CSI report associated with Ntrp groups of antenna ports, where Ntrp>1 and, based on the information, determining the CSI report associated with N≤Ntrp groups of antenna ports, where N∈{2, 3, . . . , Ntrp}. The CSI report includes a first indicator indicating, for each layer l=1, . . . , v, indices of Mv vectors including columns of a frequency-domain (FD) basis matrix Wf,l, where v≥1 is a rank value and a second indicator indicating an index of a FD offset value φr for each of the N groups of antenna ports, where r∈{1, . . . , N}, r≠r* and r* is an index of a reference group of antenna ports. The method further includes transmitting the CSI report including the first and the second indicators.

A measuring system and a measuring method of an antenna pattern based on near field to far field transformation (NFTF) are provided. The measuring system includes a probe antenna, a reference antenna, and a control system. The probe antenna measures an electric field radiated by an antenna under test to obtain electric field information. The reference antenna measures the electric field to obtain a reference phase. The control system is coupled to the antenna under test, the probe antenna, and the reference antenna, wherein the control system applies near field focusing to the reference antenna to configure a focus point of the reference antenna on the antenna under test, and the control system performs the NFTF according to the electric field information and the reference phase to output far field patterns.

The present disclosure relates to a communication technique for converging IoT technology with a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The present disclosure may be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, health care, digital education, retail business, a security and safety-related service, etc.) on the basis of 5G communication technology and IoT-related technology. In addition, the present disclosure relates to a method and device for carrying out cooperative communication in a wireless communication system. A method of a terminal of a communication system, according to one embodiment of the present disclosure, comprises the steps of: receiving, from a base station associated with a first cell, cell configuration information including a TCI configuration and a QCL configuration; checking a QCL reference antenna port on the basis of the cell configuration information; and receiving a signal from the base station on the basis of a QCL relationship with the checked QCL reference antenna port, wherein the QCL reference antenna port may be checked on the basis of a CSI-RS or SSB associated with a second cell.

The invention discloses a method for calibrating an antenna array downlink by using a plurality of satellites, and the method comprises the steps: receiving a beacon signal transmitted by each satellite in a time-sharing manner through each antenna in an antenna array, and calculating a relative signal phase difference caused by the difference of the downlink of an antenna to be calibrated relative to a reference antenna; the relative signal phase difference caused by the difference of the downlink of the antenna to be calibrated relative to the reference antenna is obtained; fitting a linear equation through a least square method according to a relative signal phase difference brought by a difference between each antenna to be calibrated in an antenna array corresponding to a plurality of on-orbit satellites and a downlink of a reference antenna; and obtaining the relative delay inequality of each to-be-calibrated antenna in the antenna array relative to the reference antenna after downlink calibration and the relative phase difference of each to-be-calibrated antenna after downlink calibration. The method is simple, reliable and convenient to implement.

Disclosed herein are systems, methods and / or computer programs for determining time and / or angle-based measurements for use in position determination. The apparatus may comprise means for receiving, at a plurality of antennae, a reference signal associated with positioning and determining cross-correlation values comprising a cross correlation between the reference signal received at each antenna and a known reference signal associated with positioning. There may also be provided means for estimating a channel response for a reference antenna of the plurality of antennae using the cross correlation values, the known reference signal and an antenna correlation comprising a known relationship between a channel response of each antenna of the plurality of antennae and the channel response of the reference antenna, and determining a time of arrival and / or an angle of arrival of the received reference signal based on the estimated channel response for the reference antenna.

The invention relates to a GNSS array antenna-based phase multi-path real-time correction method and system. The method comprises the following steps of: constructing a spatial correlation array antenna system; based on an array antenna system, calculating geometric position relations of other antenna units relative to a reference antenna unit, forming single-difference carrier phase residual observation values of different antenna units and the reference antenna unit, and constructing a carrier phase multipath error parameter estimation model; based on a carrier phase multi-path error parameter estimation model, jointly processing a multi-frequency GNSS observation value by using the consistency and frequency correlation of propagation paths of frequency points of a multi-frequency GNSS signal, and establishing a multi-frequency multi-path error redundancy estimation model; based on the multi-frequency multi-path error redundancy estimation model and particle filtering, performing nonlinear estimation on parameters of the carrier phase multi-path error parameter estimation model to obtain multi-path error parameters; and obtaining a carrier phase multipath error value of each frequency point by using the multipath error parameter, and correcting the error value in real time in GNSS positioning calculation.

The invention discloses an uplink channel signal time delay calibration method and system adopting a far field calibration system. The method comprises the steps that an uplink channel calibration unit generates an uplink channel calibration reference signal and an uplink channel calibration modulation signal and sends the uplink channel calibration reference signal and the uplink channel calibration modulation signal to a reference antenna and an antenna to be calibrated respectively; the reference antenna and the antenna to be calibrated send the received signals to a far-field calibration system; the far-field calibration system converts the received signal into a downlink signal and sends the downlink signal to the uplink channel calibration unit; the uplink channel calibration modulation signal demodulates the received signal into a signal envelope, and according to the signal envelope, a phase difference caused by the difference of the uplink channel of the to-be-calibrated antenna relative to the reference antenna is obtained; and selecting different uplink frequency points to calibrate the uplink channel relative phase difference of the to-be-calibrated antenna relative to the reference antenna to obtain the signal relative delay inequality of the to-be-calibrated antenna relative to the uplink channel of the reference antenna. According to the invention, the time delay calibration precision of the uplink channel of the antenna is improved.

The invention provides an air interface wire rapid calibration method and system, and solves the problems of high execution complexity and difficulty in engineering application caused by the adoption of space violent search in the existing air interface wire calibration technology. The method comprises the following steps: synchronously starting a static calibration antenna and a reference antenna fixedly connected with a rotary table under a plurality of rotation angles of the rotary table, and acquiring measurement data from measured equipment; determining a phase difference data set and a relative amplitude data set according to the measurement data; reconstructing a plurality of air interface transmission matrixes in a digital domain based on the data set, and screening out at least one calibration antenna spatial position combination by taking a matrix condition number as an index; and air interface wire calibration is completed according to the combination. According to the invention, the calibration complexity is reduced from a combination order to a linear order, the hardware cost and the measurement time are significantly reduced, the high-efficiency and high-precision calibration of large-scale terminals such as a whole vehicle is realized, and the method has wide applicability irrelevant to frequency.

A system for suppressing radio frequency interference (RFI) or electromagnetic interference (EMI) in a radar or magnetic resonance imaging system that scans target(s) with energy and receives signals that reflect or echo from the target(s). The system involves obtaining RFI / EMI data in the absence of signals of interest in the scanning system using at least one primary antenna and a plurality of reference antennas. The reference antennas are designed and arranged to detect RFI / EMI signals but not signals of interest in the scanning system. Simultaneously a model, e.g. CNN, is trained with the RFI / EMI data to determine the non-linear signal mappings among primary and reference antennas. The trained model is applied to predict the RFI / EMI received by the primary antenna in the presence of signals of interest. Finally, the RFI / EMI signals received by the primary antenna are removed by subtracting out the predicted RFI / EMI.

The invention discloses a photoelectric sensor system conversion efficiency calibration system and method based on a reverberation chamber, and belongs to the technical field of photoelectric sensor conversion efficiency calibration, the system comprises an electric wave reverberation chamber, a transmitting antenna, a reference antenna and a photoelectric field sensor system; the photoelectric field sensor system is composed of a photoelectric sensor, a laser source, a photoelectric detector, a polarization maintaining optical fiber and a single-mode optical fiber. In the calibration process, the reference antenna and the photoelectric sensor system are used as receiving ends respectively, receiving power at different stirring positions in the reverberation chamber is sampled to obtain two groups of transfer functions, and the total efficiency of the photoelectric sensor system is determined by comparing the two groups of transfer functions under the condition that the radiation efficiency of the reference antenna is known. The conversion efficiency of the photoelectric sensor system is obtained by combining the relation among the power, the field intensity and the total efficiency in the free space; and the effective averaging of the incident direction and the polarization state is realized by using the uniform and isotropic electromagnetic field characteristics of the reverberation chamber.

A system for communications may include an antenna array, where an inter-element spacing of antennas of the antenna array may be different across the antenna array; antenna managers that are coupled with respective antennas and configured to transmit and receive ranging signals used to measure parameters representative of distances between a respective antenna and the other antennas; a calibration unit that determines positions of the antennas based on the measured parameters and positions of reference antennas; and a communications manager that communicates with a terminal according to beam coefficients determined for the antenna array based on the determined positions of the antennas.

A method includes: accessing a ranging signal transmitted from a transmitter and received at a set of antenna elements via a channel; recording time domain samples representing the ranging signal; accessing steering matrices characterized by a time delay grid, a phase angle grid, and distances between antenna elements and a reference antenna element; generating a structured data representation of the time domain samples characterized by the steering matrices; calculating a sparse representation of the channel by executing Li-norm regularization based on the structured data representation; and calculating a time of arrival estimate and an angle of arrival estimate for the ranging signal based on the sparse representation of the channel.

There is provided a first device comprising means for: transmitting, to a second device, information indicative of a geometry of a plurality of non-planar antennas of the first device; determining at least two reference antennas of the plurality of non-planar antennas based on information indicating a geometry of the plurality of non-planar antennas; and transmitting the reference signal to the second device via the determined at least two reference antennas without transmitting the reference signal via the remainder of the plurality of non-planar antennas.

The present application relates to a kind of separation identification and monitoring method and system of radiation background noise, in separation identification and monitoring method, background noise and equipment emission signal are synchronously collected by multiple fixed reference antennas and main antenna, and time synchronization is realized by central synchronous unit.First, based on spectrum comparison, background noise probability is calculated, and first grade is filtered out;Second, baseline model is established according to reference antenna data, abnormal signal is identified and its source is judged, and burst background noise and equipment real emission are distinguished;Second grade is filtered out by using pre-stored feature library for matching identification;Finally, the comparison result of real emission signal and background noise after filtering is displayed on test interface, and the data exceeding the standard is automatically marked, test margin is calculated and conclusion is generated.Compared with prior art, the present application can effectively solve the technical problem that background noise and equipment signal are difficult to separate in real time and accurately in complex electromagnetic environment, and the reliability and efficiency of radiation test are significantly improved.

The invention discloses an antenna simulation efficiency compensation design method and device, equipment and a storage medium, and relates to the technical field of simulation testing. The method comprises the following steps: acquiring a theoretical difference value between simulation efficiency of a standard reference antenna constructed by an antenna to be designed in simulation software and a microwave anechoic chamber; according to the radio frequency matching circuit structure of the antenna to be designed and the coaxial line parameters, theoretical loss parameters are obtained through calculation; constructing a simulation model of a to-be-designed antenna, and obtaining theoretical radiation efficiency according to the simulation model; and calculating the antenna simulation radiation efficiency according to the obtained theoretical difference value, the theoretical loss parameter and the theoretical radiation efficiency. Theoretical calculation and compensation are carried out on variables related to simulation and real objects, the difference between simulation efficiency and actual efficiency is made up, and more accurate antenna performance evaluation is achieved.

Embodiments of the present disclosure relate to devices, methods, apparatuses, and computer-readable storage media for relative phase determination for frequency drift compensation. The method includes obtaining, at a first device, a first reference signal associated with a reference antenna from a second device within a first time period and obtaining a second reference signal associated with the reference antenna within a second time period after the first time period; and determining a phase relationship between the reference antenna and at least one target antenna based at least on the first reference signal and the second reference signal, wherein the at least one target antenna and the reference antenna are located in the same antenna array. In this way, compensation for frequency drift can be achieved based on the determination of relative phase, which is critical to positioning accuracy and stability in high-accuracy BLE AoA / AoD positioning solutions.

The invention relates to an electromagnetic logging technology, and discloses a while-drilling forward focusing electromagnetic logging method, which comprises the following two stages: (1) a pre-testing stage: a magnetic ring antenna array linearly arranged along a drill collar is utilized, an antenna at the rearmost end is used as a reference antenna to transmit a signal, and a front preorder antenna simultaneously receives the signal, and the amplitude and the phase delay of the received signal of each preorder antenna are synchronously obtained. (2) forward focusing stage: configuring transmitting parameters for the preorder antennas, setting the initial phase of each preorder antenna as a negative value of measured phase delay, and calculating an inversely proportional weight coefficient according to the receiving amplitude so as to configure the driving amplitude of each preorder antenna; and finally, driving the reference antenna and the configured preorder antenna to synchronously transmit, performing coherent superposition in front of the drill bit to form a focused wave beam, and weakening signal interference of lateral and backward stratums of the instrument at the same time. Equipment does not need to be preset in an undrilled stratum, the method is completely compatible with an existing instrument, and the signal strength and the signal-to-noise ratio of forward detection can be remarkably improved.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Apparatuses and methods for reporting for calibration. A method performed by a UE is includes receiving, from a base station, information on a channel state information (CSI) report, the information indicating antenna groups; determining a reference antenna group based on the information; determining calibration-related information (CLI) related to the antenna groups; and transmitting, to the base station, the CSI report including a CLI indicator indicating the reference antenna group and the CLI.

The application discloses a dynamic hybrid beam tracking system for satellite communication. The system divides the beam tracking into three operation modes according to the current reference antenna steering in the memory, the antenna steering updated by the mechanical three-axis transmission shaft, the satellite incoming path direction relative to the antenna main shaft direction of the user terminal, the received signal strength indicator and the predefined antenna field of view. The three operation modes include: the first mode, using coarse beams to realize large range tracking at a low sampling rate; the second mode, using fine beams to realize medium range tracking at the same low sampling rate; and the third mode, using fine beams to realize small range tracking at a high sampling rate. The system can realize accurate and adaptive beam alignment to improve the satellite communication efficiency.

This invention relates to electromagnetic logging technology and discloses a forward-focusing electromagnetic logging method while drilling, comprising two stages: (1) Pre-testing stage: using a magnetic ring antenna array arranged in a straight line along the drill collar, the last antenna is used as a reference antenna to transmit signals, and the preceding antennas simultaneously receive them, so as to synchronously acquire the amplitude and phase delay of the received signals of each preceding antenna. (2) Forward focusing stage: configuring the transmission parameters for the preceding antennas, setting their initial phase to the negative value of the measured phase delay, and calculating an inversely proportional weighting coefficient based on the received amplitude, thereby configuring the driving amplitude of each preceding antenna; finally, driving the reference antenna and the configured preceding antennas to transmit synchronously, and coherently superimposing them in front of the drill bit to form a focused beam, while weakening the signal interference from the instrument's sides and back to the formation. This invention does not require pre-setting equipment in un-drilled formations, is fully compatible with existing instruments, and can significantly improve the signal strength and signal-to-noise ratio of forward detection.

The invention discloses an accurate attitude determination method and system based on GNSS multi-antenna multi-frequency ambiguity step-by-step solution, and the method comprises the steps: firstly calculating the coordinates of a reference antenna in an ECEF coordinate system through employing a reference antenna observation value, and then calculating a rotation matrix from the ECEF coordinate system to a navigation coordinate system at the reference antenna; constructing a double-difference pseudo-range and carrier phase observation equation between the reference antenna and each auxiliary antenna on the carrier according to GNSS multi-antenna multi-frequency observation data, constructing a wide-lane carrier phase observation equation according to the double-difference pseudo-range and carrier phase observation equation, and obtaining double-difference wide-lane ambiguity of each baseline; according to the GNSS multi-antenna multi-frequency attitude determination method, the function of performing high-precision attitude determination according to step-by-step calculation according to the GNSS multi-antenna multi-frequency ambiguity and by adopting a mode of combining a direct method and a least square method is realized, and the GNSS multi-frequency attitude determination calculation efficiency is improved by utilizing the advantage that the ambiguity of the multi-frequency combination observation value is easy to fix, so that the GNSS multi-frequency observation value is reasonably utilized, and the GNSS multi-antenna multi-frequency attitude determination accuracy is improved. And the attitude calculation precision is also improved.

Method for determining the antenna gain of an antenna (21) to be tested in free space, wherein the method comprises the following steps: Acquisition of measurement results of a transmitted power of a measurement signal (24a, 24b) transmitted between a reference antenna (22) and an antenna to be tested (21); Determining an input reflection factor ( P e _ TP e _ R ) | P g _ R = 0 the antenna (21) to be tested and an input reflection factor ( P g _ TP g _ R ) | P e _ R = 0 the reference antenna (22); Detecting polarization losses based on an angle between the unit vector of the electric field vector (p̂) T ) the antenna (21) to be tested and the electric field vector (p̂ R ) the reference antenna (22); where the detection takes place in the frequency domain; Converting the recorded measurement results into the time domain; Applying a time domain filter (26) to the measurement results converted into the time domain, wherein a filter width of the time domain filter (26) is determined as a function of a spatial distance (r) between the reference antenna (22) and the antenna (21) to be tested, so that measurement result components (24b) resulting from multipath propagation of the measurement signal (24a, 24b) between the reference antenna (22) and the antenna (21) to be tested are reduced or removed; Converting the filtered measurement results into the frequency domain; and Determining the antenna gain G T (ϑ, φ) of the antenna (21) to be tested, taking into account the recorded input reflection factors and polarization losses, based on the filtered measurement results available in the frequency domain using the following equation: GT ( ϑ , ϕ ) = 10 log 10 ( P _ TP g _ R ) − 20 log 10 ( λ 4 π r ) − GREF ( ϑ , φ ) − ( 10 log ( 1 − ( P _ TP g _ R ) | P g _ R = 0 ) + 10 log ( 1 − ( P g _ TP g _ R ) |. P _ R = 0 ) + 20 log |