Abstract: A user equipment (UE) is served by a serving cell of a network and is configured to measure channel state information reference signals (CSI-RS) from a target cell. The UE receives, from the serving cell, a measurement configuration message indicating the UE is to measure CSI-RS from a target cell of the network, wherein the measurement configuration message does not include Synchronization Signal Block (SSB) information for the target cell but further comprises an indication of whether the target cell transmits SSBs. The UE determines, based on at least the measurement configuration message, a time and frequency resource on which the CSI-RS of the target cell are to be transmitted and measures the CSI-RS of the target cell.

Abstract: The present disclosure provides a method and a device for measuring a radiation pattern of an antenna array. The method includes: obtaining a plurality of array radiation patterns corresponding to a plurality of array elements and a plurality of center positions corresponding to the plurality of array radiation patterns; feeding a preset port excitation to the antenna array; obtaining a plurality of sets of measurement data of the antenna array at a plurality of corresponding measurement points in a far field of the antenna array; obtaining an aperture field excitation based on the plurality of array radiation patterns, the plurality of center positions, positions of the plurality of measurement points and the plurality of sets of measurement data; and obtaining a radiation pattern of the antenna array at a target position based on the aperture field excitation, the plurality of array radiation patterns and the plurality of center positions.

Abstract: A method for testing radio frequency performance of a wireless device is provided. Power level reporting information of a device under test is obtained. A propagation matrix is obtained based on the power level reporting information. An inverse matrix is obtained based on the propagation matrix to form a virtual cable between an output port of an instrument and a receiver port of the device under test. A throughput test signal is transmitted through the virtual cable to perform a performance test on the device under test and to obtain a test result of the radio frequency performance.

Abstract: The present disclosure provides a method and system for testing wireless performance of a wireless terminal configured as a DUT having multiple transmitting antennas and placed in an anechoic chamber. The method includes: obtaining antenna pattern of the multiple transmitting antennas, and importing the antenna pattern into a channel emulator; selecting a same number of testing antennas in the anechoic chamber as a number of the transmitting antennas; the selected testing antennas receiving a signal from the transmitting antennas, and sending the signal to the channel emulator, the channel emulator processing the signal to generate an analog signal and sending the analog signal to an analog base station; and the analog base station receiving the analog signal and performing a throughput test to obtain an uplink wireless performance test of the DUT.

Abstract: The disclosure provides a method for measuring a power of a non-constant envelope modulated signal, an electronic device, and a computer readable storage medium. The method includes: sampling baseband I/Q data transmitted by a device under test to obtain sample data, in which a sampling duration is less than a length of a cycle of the non-constant envelope modulated signal; calculating a sample power within the sampling duration based on the sample data; matching in predetermined baseband I/Q data in the cycle based on the sample data to obtain a target baseband I/Q data segment; obtaining a power calibration value corresponding to the target baseband I/Q data segment; and obtaining an actual power of the non-constant envelope modulated signal in the cycle based on the power calibration value corresponding to the target baseband I/Q data segment and the sample power within the sampling duration.

Abstract: Provided are a method and device for reconstructing a field source of an array antenna based on dipoles. The method includes: S1, measuring a radiation field of the array antenna; S2, obtaining a first initial reconstruction array X; S3, constructing a first transmission matrix T; S4, performing an iterative calculation to obtain a first final reconstruction array X?; S5, obtaining a second initial reconstruction array Y; S6, constructing a second transmission matrix T?; and S7, performing an iterative calculation to obtain a second final reconstruction array Y?. The device includes a measuring unit, a reconstruction plane determining unit, a first initial reconstructing unit, a first transmission matrix constructing unit, a first final reconstructing unit, a second initial reconstructing unit, a second transmission matrix constructing unit, and a second final reconstructing unit.

Abstract: Disclosed are a method and apparatus for measuring wireless performance of a receiver of a wireless terminal, and a non-transitory computer readable storage medium. The method includes the following. A measured signal of a receiver to be measured is determined. Measured signals of other receivers except the receiver to be measured are zero. Multiple transmitted signals are determined based on the measured signals. The multiple transmitted signals are transmitted through multiple measurement antennas. When a bit error rate of the receiver to be measured does not equal a preset bit error rate, the measured signal is adjusted, determining the multiple transmitted signals based on the updated measured signal. When the bit error rate equals the preset error rate, a power of the measured signal is determined as the radiant sensitivity of the receiver to be measured.

Abstract: A method for testing wireless performance of a MIMO wireless terminal includes: obtaining antenna pattern information of a plurality of antennas of the MIMO wireless terminal tested in an electromagnetic anechoic chamber; further obtaining a test signal according to the antenna pattern information of the MIMO wireless terminal; calibrating the test signal by using an error calibration joint matrix of the MIMO wireless terminal so as to obtain a transmitting signal for testing; and finally feeding the transmitting signal for testing into a plurality of measurement antennas of the electromagnetic anechoic chamber and transmitting the transmitting signal to the wireless terminal through the measurement antennas so as to test the wireless terminal.

Abstract: Disclosed is an omnidirectional ceiling antenna (10). The omnidirectional ceiling antenna (10) comprises: a base plate (101); a first antenna unit (102) and a second antenna unit (103), the first antenna unit and the second antenna unit are arranged on the base plate at intervals, and the first antenna unit and the second antenna unit are not symmetrical with respect to a longitudinal central axis of the base plate; a coupling plate (104), the coupling plate is arranged on the base plate; an isolation plate (105), the isolation plate is arranged on the base plate; and a first feeding member (106) and a second feeding member (107), the first feeding member cooperates with the first antenna unit so as to feed the first antenna unit, and the second feeding member cooperates with the second antenna unit so as to feed the second antenna unit.

Abstract: A method for testing wireless performance of a MIMO wireless terminal includes: obtaining antenna pattern information of a plurality of antennas of the MIMO wireless terminal tested in an electromagnetic anechoic chamber; further obtaining a test signal according to the antenna pattern information of the MIMO wireless terminal; calibrating the test signal by using an error calibration joint matrix of the MIMO wireless terminal so as to obtain a transmitting signal for testing; and finally feeding the transmitting signal for testing into a plurality of measurement antennas of the electromagnetic anechoic chamber and transmitting the transmitting signal to the wireless terminal through the measurement antennas so as to test the wireless terminal.

Abstract: Disclosed are a system for testing a wireless terminal and a method for controlling the same. The system includes: a reflecting surface, configured to totally reflect one or more first wireless signals emitted by the wireless terminal; a test antenna, configured to receive the one or more first wireless signals reflected by the reflecting surface; and an absorbing screen, configured to absorb one or more second wireless signals emitted by the wireless terminal. The device under test, the test antenna and the reflecting surface correspond to a same ellipsoid, the device under test and the test antenna are arranged at two foci of the ellipsoid respectively, the reflecting surface is arranged on the ellipsoidal surface and the absorbing screen is arranged on a straight line between the device under test and the test antenna.

Abstract: The present disclosure describes methods and apparatuses for matrix compensation to prevent rank deficiency. In some aspects, a channel matrix is formed based on channel feedback matrices that are received from multiple devices. The channel matrix is transformed to provide a channel covariance matrix, which is then decomposed into a unitary matrix and Eigen value matrix components. Diagonal values of the Eigen value matrix are increased to provide a compensated Eigen value matrix. Based on the compensated Eigen value matrix, a steering matrix is determined for steering transmissions through the channel to the multiple devices. By compensating the Eigen value matrix, rank deficiency issues that typically result in failed steering matrix calculations can be prevented. Alternately or additionally, a dynamic range of the steering matrix calculations may be reduced by compensating matrices, enabling steering matrices to be calculated with less-complex or fewer hardware resources.

Abstract: The present disclosure describes methods and apparatuses for singular value decomposition with norm sorting. In some aspects, a sounding frame is received through a channel of a wireless medium. Based on the sounding frame, a channel covariance matrix describing conditions of the channel can be determined. The channel covariance matrix is then decomposed, with an ortho-normal matrix, to provide an intermediate matrix of vectors. One or more vectors of the intermediate matrix are sorted based on a respective norm to provide a norm-sorted matrix of the vectors. A steering matrix for the channel is then generated by ortho-normalizing at least two vectors of the norm-sorted matrix. By so doing, a steering matrix can be generated quickly and efficiently for use in subsequent communication operations.

Abstract: The present disclosure provides a method and a device for measuring a radiation pattern of an antenna array. The method includes: obtaining a plurality of array radiation patterns corresponding to a plurality of array elements and a plurality of center positions corresponding to the plurality of array radiation patterns; feeding a preset port excitation to the antenna array; obtaining a plurality of sets of measurement data of the antenna array at a plurality of corresponding measurement points in a far field of the antenna array; obtaining an aperture field excitation based on the plurality of array radiation patterns, the plurality of center positions, positions of the plurality of measurement points and the plurality of sets of measurement data; and obtaining a radiation pattern of the antenna array at a target position based on the aperture field excitation, the plurality of array radiation patterns and the plurality of center positions.

Abstract: Provided are a method and a device for generating a MIMO test signal which is configured to test a performance of MIMO wireless terminal. With the method, the plurality of space propagation matrixes of the MIMO testing system are acquired by performing the phase shift transformation on the plurality of calibration matrixes of the MIMO testing system, the target space propagation matrix having the isolation degree meeting the preset condition is determined according to the maximum amplitude value of elements in each inverse matrix of the plurality of space propagation matrixes, and the transmitting signal for test is generated by a calculation according to the throughput testing signal acquired by the pre-calculation and the target calibration matrix corresponding to the target space propagation matrix.

Abstract: Provided are a method and device for reconstructing a field source of an array antenna based on dipoles. The method includes: S1, measuring a radiation field of the array antenna; S2, obtaining a first initial reconstruction array X; S3, constructing a first transmission matrix T; S4, performing an iterative calculation to obtain a first final reconstruction array X?; S5, obtaining a second initial reconstruction array Y; S6, constructing a second transmission matrix T?; and S7, performing an iterative calculation to obtain a second final reconstruction array Y?. The device includes a measuring unit, a reconstruction plane determining unit, a first initial reconstructing unit, a first transmission matrix constructing unit, a first final reconstructing unit, a second initial reconstructing unit, a second transmission matrix constructing unit, and a second final reconstructing unit.

Abstract: Disclosed is an omnidirectional ceiling antenna (10). The omnidirectional ceiling antenna (10) comprises: a base plate (101); a first antenna unit (102) and a second antenna unit (103), the first antenna unit and the second antenna unit are arranged on the base plate at intervals, and the first antenna unit and the second antenna unit are not symmetrical with respect to a longitudinal central axis of the base plate; a coupling plate (104), the coupling plate is arranged on the base plate; an isolation plate (105), the isolation plate is arranged on the base plate; and a first feeding member (106) and a second feeding member (107), the first feeding member cooperates with the first antenna unit so as to feed the first antenna unit, and the second feeding member cooperates with the second antenna unit so as to feed the second antenna unit.

Abstract: Provided are a method and a device for generating a MIMO test signal which is configured to test a performance of MIMO wireless terminal. With the method, the plurality of space propagation matrixes of the MIMO testing system are acquired by performing the phase shift transformation on the plurality of calibration matrixes of the MIMO testing system, the target space propagation matrix having the isolation degree meeting the preset condition is determined according to the maximum amplitude value of elements in each inverse matrix of the plurality of space propagation matrixes, and the transmitting signal for test is generated by a calculation according to the throughput testing signal acquired by the pre-calculation and the target calibration matrix corresponding to the target space propagation matrix.

Abstract: Disclosed are a system for testing a wireless terminal and a method for controlling the same. The system includes: a device under test being a wireless terminal; a reflecting surface, configured to totally reflect one or more wireless signals emitted by the wireless terminal; a rotation mechanism, configured to drive the device under test to rotate; a test antenna, configured to receive one or more wireless signals reflected; and an absorbing screen. The device under test, the test antenna and the reflecting surface correspond to a same ellipsoidal surface, the device under test and the test antenna are arranged at two foci of the ellipsoidal surface respectively, and the reflecting surface is arranged on the ellipsoidal surface. The system has advantages of small repetition error of test results, stable test results, high testing efficiency, and low cost.

Abstract: Disclosed are a system for testing a wireless terminal and a method for controlling the same. The system includes: a reflecting surface, configured to totally reflect one or more first wireless signals emitted by the wireless terminal; a test antenna, configured to receive the one or more first wireless signals reflected by the reflecting surface; and an absorbing screen, configured to absorb one or more second wireless signals emitted by the wireless terminal. The device under test, the test antenna and the reflecting surface correspond to a same ellipsoid, the device under test and the test antenna are arranged at two foci of the ellipsoid respectively, the reflecting surface is arranged on the ellipsoidal surface and the absorbing screen is arranged on a straight line between the device under test and the test antenna.