Provided are a test system and a test method, which are used for carrying out a wireless test on a device under test to obtain the performance of electromagnetic radiation. The test system comprises a bearing platform, a plurality of test antennas and a motion mechanism, wherein the bearing platform is used for bearing the device under test; the motion mechanism comprises at least two motion units, each motion unit is equipped with the test antenna, and the test antenna is arranged to have a preset angular interval relative to the bearing platform; and a driving unit is used for driving the motion unit, such that the test antenna reaches a plurality of sampling points, the sampling points are located in different angles of the bearing platform, and the angular interval of the sampling points relative to the bearing platform is less than the preset angular interval.
A wireless device air radiation testing system and method, and a testing device. The method comprises: first, acquiring an inverse matrix of a spatial transmission matrix corresponding to a plurality of frequency subbands between a testing device and a wireless device; then, according to frequency band, dividing a signal to be tested, having a preset frequency band, into signals to be tested corresponding to a plurality of frequency subbands; and finally loading the inverse matrix of the spatial transmission matrix corresponding to each frequency subband into the signal to be tested corresponding to the corresponding frequency subband, so as to establish a virtual cable connection between the testing device and the wireless device, thereby achieving the wireless device performing air radiation testing, and solving the problems of low isolation and low test precision when using a radiation two-stage (RTS) method for testing, said problems being caused by a high degree of unevenness between the amplitude and phase of a signal to be tested which has a preset frequency and a relatively wide bandwidth.
A test system for a vehicle-mounted antenna. In the test system, when a bearing face (123) is connected to a reflecting plate (14) or when the reflecting plate (14) extends from the bearing face (123), the testing system for a vehicle-mounted antenna can be used for a semi-anechoic chamber test; and when the bearing face (123) is not connected to the reflecting plate (14) or when the reflecting plate (14) is retracted into the bearing face (123), the test system for a vehicle-mounted antenna can be used for a fully anechoic chamber test. That is to say, the test system for a vehicle-mounted antenna not only has the fully anechoic chamber testing function, but also has the semi-anechoic chamber testing function, and the two functions can be conveniently switched by means of the mounting/removal or extension/retraction of the reflecting plate (14). Therefore, the test system has a low implementation cost, can adapt to more test requirements, and alleviates the technical problem of it not being possible for existing test systems for vehicle-mounted antennas to give consideration to both the fully anechoic chamber testing and the semi-anechoic chamber testing.
Provided in the present invention are a test system and a test method, which are used for carrying out a wireless test on a to-be-tested piece (500) to obtain the performance of electromagnetic radiation. The test system comprises a bearing platform (100), a plurality of test antennas (200) and a motion mechanism, wherein the bearing platform (100) is used for bearing the to-be-tested piece; the motion mechanism comprises at least two motion units (300), each motion unit (300) is provided with the test antenna (200), and the test antenna (200) is arranged to have a preset angular interval relative to the bearing platform (100); and the motion mechanism further comprises a driving unit, the driving unit is used for driving the motion unit (300), such that the test antenna (200) reaches a plurality of sampling points (600), the sampling points (600) are located in different angular positions of the bearing platform (100), and the angular interval of the sampling points (600) relative to the bearing platform (100) is less than the preset angular interval.
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.
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.
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.
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.
Disclosed in the present invention are a phased-array antenna protocol test device and method. The method comprises: a first microwave anechoic chamber and a second microwave anechoic chamber; a base station coupling antenna, all base station coupling probes being disposed within a preset near-field radiation distance in one-to-one correspondence to multiple base station unit antennas; a terminal coupling antenna, all terminal coupling probes being disposed within the preset near-field radiation distance in one-to-one correspondence to multiple terminal unit antennas; and a channel simulator, which simulates a real-time phased-array antenna working state according to element-in-array pattern information of the base station unit antennas, element-in-array pattern information of the terminal unit antenna, and a channel model to obtain communication protocol performance and radio frequency performance. The test device provided by the embodiments of the present invention can simulate the real working environments and states of a base station and a terminal, so as to obtain various indicators of a test protocol and performance indicators of the radio frequency terminal and the base station, thereby effectively ensuring the working efficiency and accuracy of a test, and is simple and easy to implement.
Disclosed in the present invention is a multiple-antenna wireless device radio interface testing apparatus, comprising: a darkroom, a wave-absorbing material being disposed on an inner wall of the darkroom; multiple coupling probes, the multiple coupling probes being movably disposed in the darkroom and used to simultaneously or individually perform power coupling transmission for an antenna within a pre-determined near-field radiation range of a location of a current probe, a maximum dimension of metal in all cross-sections of probe ends of coupling probes within five centimeters of a feed line being less than or equal to five centimeters, so as to acquire transceiving performance of the multiple-antenna wireless device. According to the testing apparatus of embodiments of the present invention, it is possible to use an individual near-field coupling means for an antenna, and it is also possible to simultaneously or individually perform radio interface testing for an antenna within a near-field radiation distance, which not only increases testing operation efficiency, but also effectively increases testing accuracy.
Disclosed in the present invention is a multiple-input multiple-output (MIMO) test apparatus for a multi-antenna wireless device. The test apparatus comprises: a darkroom, a wave absorbing material being provided on an inner wall of the darkroom; and a plurality of coupling probes, the plurality of coupling probes being movably provided within the darkroom, and being used for simultaneously or separately performing energy coupling transmission on antennas within a preset near field radiation range at a position where the current probe is located. The maximum dimension of metals within the cross section formed by the tip of each coupling probe which is inserted 5 cm into a feeder line is less than or equal to 5 cm, so as to acquire a MIMO throughput of the multi-antenna wireless device. The test apparatus according to the embodiments of the present invention can realize a virtual wire by means of performing separate near-field coupling on an antenna, and can simultaneously or separately perform a throughput test on the antenna within a near-field radiation distance, thereby improving the working efficiency of the test, and effectively improving the accuracy of the test.
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.
Disclosed are a radio frequency performance testing method and apparatus of a wireless device, and a tester. The method comprises: collecting power return information of a tested piece; obtaining a propagation matrix according to the power return information, and obtaining a loaded inverse matrix according to the propagation matrix to form a virtual wire between an instrument output port and a receiver port of the tested piece; and performing transmission by means of the virtual wire according to a throughput rate test signal to perform performance testing on the tested piece, and generating a radio frequency performance test result. According to the method, the solving of the virtual wire can be realized according to the power return information, thereby improving the testing accuracy and efficiency, and improving the testing applicability.
Disclosed is a method for testing the wireless performance of a wireless terminal, comprising the following steps: antenna pattern information of a plurality of transmitting antennas of a device under test is acquired and imported into a channel simulator; the transmitting antennas of the device under test transmit signals to selected test antennas to form a signal test propagation matrix; selected test antenna input ports receive transmitting antenna output port signals transmitted from the transmitting antenna output ports of the device under test to form test antenna input port signals and send same to the channel simulator, the channel simulator receives the signals and processes same to obtain simulation base station feed signals and sends the simulation base station feed signals to a simulation base station; and the simulation base station receives the simulation base station feed signals to perform a throughput test, so as to implement an uplink wireless performance test of the device under test. Also disclosed is a system for testing the wireless performance of a wireless terminal that is compatible with the method. The method and system of the present application can ensure the accuracy and convenience of test, and are simple to implement and low in costs.
Disclosed are a method and device for measuring wireless performance of a receiver of a wireless terminal, and a computer readable storage medium. The method comprises: determining a measured signal of a receiver to be measured, wherein the wireless terminal comprises a plurality of receivers, and measured signals of receivers in the plurality of receivers except the receiver to be measured are zero; determining a plurality of transmit signals according to the measured signals; controlling a plurality of measurement antennas to transmit the plurality of transmit signals; obtaining a receive signal received by the receiver to be measured; determining whether an error rate of the receive signal reaches a preset error rate or not; if the error rate does not reach the preset error rate, adjusting the measured signal, and returning to the operation of determining the plurality of transmit signals according to the measured signal; and if the error rate reaches the preset error rate, determining the power of the measured signal to be the radiant sensitivity of the receiver to be measured.
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.
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.
H01Q 21/29 - Combinations of different interacting antenna units for giving a desired directional characteristic
H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
H04B 7/04 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
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.
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.
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.
i≤360°, and the N measurement antennas are not located in the same plane. The present disclosure can create a measurement environment with small coupling interference and low reflection between the measurement antennas in a relatively small anechoic chamber, improving the measurement accuracy.
Proposed is a wireless performance testing method for an MIMO wireless terminal. The method comprises: acquiring antenna pattern information about a plurality of antennas of a tested MIMO wireless terminal tested in a microwave darkroom; then, acquiring a test signal according to the antenna pattern information about the tested MIMO wireless terminal, and calibrating the test signal using an error calibration joint matrix of the tested MIMO wireless terminal so as to obtain a transmission signal for a test purpose; and finally, feeding the transmission signal for a test purpose into a plurality of measurement antennas in the microwave darkroom, and sending the transmission signal to the wireless terminal via the measurement antennas to test the wireless terminal. Since an error calibration joint matrix is used to calibrate a test signal to obtain a transmission signal for a test purpose, a test error is eliminated, and the technical problem in the prior art that the test error cannot be quantified is solved, resulting in the accuracy and the repeatability of an MIMO wireless terminal test.
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.
G01R 27/28 - Measuring attenuation, gain, phase shift, or derived characteristics of electric four-pole networks, i.e. two-port networksMeasuring transient response
Provided is a system for testing a wireless terminal. The wireless terminal is configured as a device under test. The system includes: a test antenna; a reflecting surface, configured to totally reflect one or more first wireless signals emitted by the device under test; an absorbing screen, configured to absorb one or more second wireless signals emitted by the device under test, in which the one or more second wireless signals are emitted by the device under test toward a direction of the test antenna without reflection through the reflecting surface; a controller, coupled to the device under test and configured to control the device under test to emit the one or more first and second wireless signals; a power detection device, configured to detect a power of the one or more first wireless signals reflected by the reflecting surface and received by the test antenna.
Disclosed are a wireless terminal testing system and a method for controlling same, said system comprising: a device to be tested, the device to be tested being a wireless terminal; a reflective surface, used for total reflection of a wireless signal emitted by the wireless terminal; a test antenna, used for receiving a wireless signal; an absorbing screen; the positional relationship of the device to be tested, the test antenna, and the reflective surface correspond to a single ellipsoidal plane, wherein the device to be tested and the test antenna are arranged at two foci of the same ellipsoidal plane, and the reflective surface is arranged on the ellipsoidal plane; the absorbing screen is arranged on the straight line between the device to be tested and the test antenna. The testing system of the embodiments of the present invention may measure at one time the sum of the powers of a plurality of directional wireless signals, such that the structure of the testing system is simplified, the testing speed is faster, and test operations being repeated multiple times is avoided; thus the invention has the advantages of small repetition error of test results, stable test results, test efficiency, and low costs, and is especially suitable for use in such areas as wireless-terminal wireless performance research and development and production.
Disclosed are a wireless terminal testing system and a method for controlling same, said system comprising: a device to be tested, the device to be tested being a wireless terminal; a reflective surface, used for total reflection of a wireless signal emitted by the wireless terminal; a rotation mechanism, used for securing the device to be tested and driving the device to be tested to rotate, such that the wireless signals emitted by the wireless terminal in multiple directions are directed at the reflective surface; a test antenna, used for receiving a wireless signal; an absorbing screen; the positional relationship of the device to be tested, the test antenna, and the reflective surface correspond to a single ellipsoidal plane, wherein the device to be tested and the test antenna are arranged at two foci of the same ellipsoidal plane, and the reflective surface is arranged on the ellipsoidal plane; the absorbing screen is arranged on the straight line between the device to be tested and the test antenna. The wireless terminal testing system of the embodiments of the present invention simplifies system structure, and prevents test operations being repeated multiple times; thus the invention has the advantages of small repetition error of test results, stable test results, high testing efficiency, and low cost.
Provided is a wireless terminal testing system, said wireless terminal testing system comprising: a device to be tested, said device to be tested being a wireless terminal; a test antenna; a test antenna; an absorbing screen, used for absorbing radio waves; a controller, connected to said device to be tested, and used for controlling said device to be tested to send a wireless signal; a power measurement device, used for measuring the power of the wireless signal received by said test antenna; the positional relationship of the device to be tested, the test antenna, and the reflective surface corresponds to a single ellipsoidal plane, wherein said device to be tested and said test antenna are arranged at two foci of the same ellipsoidal plane and said reflective surface is arranged on said ellipsoidal plane; the absorbing screen is arranged on the straight line between the device to be tested and the test antenna. The wireless terminal testing system improves testing efficiency and reduces costs.
A method and a device for testing a performance of a wireless terminal and a computer readable storage medium are provided. The wireless terminal is placed in a first anechoic chamber and comprises m antennas, where m is a positive integer greater than 1. The method comprises steps of: S1, obtaining m pieces of antenna pattern information of the m antennas; S2, obtaining n first testing signals according to the m pieces of antenna pattern information, where n is a positive integer greater than 1; S3, feeding the n first testing signals to n testing antennas in a second anechoic chamber, and transmitting the n first testing signals to the wireless terminal by the n testing antennas; and S4, obtaining a piece of receiving information of the m antennas for the n first testing signals, and obtaining the performance of the wireless terminal according to the piece of receiving information.
A method and a device for testing a performance of a wireless terminal and a computer readable storage medium are provided. The wireless terminal is placed in a first anechoic chamber and comprises m antennas, where m is a positive integer greater than 1. The method comprises steps of: S1, obtaining m pieces of antenna pattern information of the m antennas; S2, obtaining n first testing signals according to the m pieces of antenna pattern information, where n is a positive integer greater than 1; S3, feeding the n first testing signals to n testing antennas in a second anechoic chamber, and transmitting the n first testing signals to the wireless terminal by the n testing antennas; and S4, obtaining a piece of receiving information of the m antennas for the n first testing signals, and obtaining the performance of the wireless terminal according to the piece of receiving information.
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