CN-122027045-A - Automatic detection and evaluation method and system for radio frequency performance limit of multi-antenna wireless equipment

CN122027045ACN 122027045 ACN122027045 ACN 122027045ACN-122027045-A

Abstract

The invention relates to the technical field of wireless communication testing, and discloses an automatic detection and evaluation method and an automatic detection and evaluation system for the radio frequency performance limit of multi-antenna wireless equipment. In this state, a power search is performed on the target port to lock the preliminary limit power point, and further a multidimensional evaluation including thermal steady-state drift analysis and silence window-based environmental isolation verification is performed to confirm the effective limit power value. The system traverses all ports to repeat the steps, and the summarized data is extremely poor in calculation consistency and rated power of the whole machine. According to the invention, through physical reproduction and concurrent heat accumulation and electromagnetic crosstalk environments, accurate assessment of radio frequency performance and automatic attribution of a heat failure mechanism under the extreme working conditions of equipment are realized.

Inventors

XU XIAO
DONG SHUFENG
MO JIAHUAN

Assignees

深圳金英拓联科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260225

Claims (10)

1. The automatic detection and evaluation method for the radio frequency performance limit of the multi-antenna wireless equipment is characterized by comprising the following steps: Aiming at multi-antenna wireless equipment with a plurality of radio frequency ports, defining one radio frequency port to be tested currently as a target port, defining all radio frequency ports except the target port as interference ports, constructing an automatic detection topology and controlling the multi-antenna wireless equipment to enter a full-port synchronous concurrent transmitting state; In the full-port synchronous concurrent transmitting state, performing automatic search of radio frequency performance limit on the target port, and locking a preliminary limit power point based on signal quality judgment logic; Maintaining an operational state of the multi-antenna wireless device, performing a multi-dimensional performance assessment including thermal steady-state drift analysis and environmental isolation verification at the preliminary limiting power point, thereby confirming an effective limiting power value; And traversing each radio frequency port of the multi-antenna wireless device, repeatedly executing the steps from the construction of the automatic detection topology to the confirmation of the effective limit power value, summarizing data and generating an evaluation report of the radio frequency performance limit of the multi-antenna wireless device.
2. The method for automatically detecting and evaluating the radio frequency performance limit of a multi-antenna wireless device according to claim 1, wherein controlling the multi-antenna wireless device to enter a full-port synchronous concurrent transmission state specifically comprises: transmitting an instruction to a baseband control unit of the multi-antenna wireless equipment, closing a carrier sense multiple access mechanism or a shielding idle channel evaluation function, and entering a forced transmission mode; Determining the moment that the rising edge of the burst envelope transmitted by the target port reaches half the amplitude of the linear region of the power amplifier as a first moment, determining the moment that the rising edge of the burst envelope transmitted by any one interference port reaches half the amplitude of the linear region of the power amplifier as a second moment, and controlling the absolute value of the time difference between the first moment and the second moment not to exceed a preset synchronous tolerance, thereby ensuring the overlapping of transient loads of a power supply; Wherein the preset interference duty cycle is not less than 90% and not more than 99%, and the synchronization margin is set in a range of 0.1 microsecond to 1 microsecond.
3. The method for automatically detecting and evaluating the radio frequency performance limit of the multi-antenna wireless device according to claim 1, wherein the performing step of the environmental isolation check specifically includes: The target ports are controlled to periodically insert a silent window without power output in a transmitting sequence, and all the interference ports are kept to continuously transmit; The vector signal analyzer is controlled to acquire a noise sequence in the silence window by using a gating trigger function and calculate and measure average power, or acquire a signal envelope containing the silence window by using a zero broadening mode and calculate the minimum local average power in the silence window by using a valley-finding algorithm; acquiring in-band leakage power, wherein the in-band leakage power is a value obtained by subtracting a preset calibration compensation factor from the measured average power when the gating trigger function is utilized, and is the minimum local average power when the zero broadening mode is utilized; Calculating the difference between the in-band leakage power and the preliminary limiting power point, dividing the difference by twenty, calculating a power function value based on ten as an index, and converting the power function value into a percentage form to obtain a crosstalk interference factor; and if the crosstalk interference factor does not exceed the preset isolation confidence threshold, confirming that the preliminary limit power point is effective.
4. The method for automatically detecting and evaluating the radio frequency performance limit of a multi-antenna wireless device according to claim 3, wherein the acquiring the signal envelope containing the silence window using the zero-stretching mode and calculating the minimum local average power in the silence window by the valley-finding algorithm specifically comprises: Setting the sampling capturing duration of the vector signal analyzer to be not less than 2.5 times of a preset transmitting period, so as to ensure that no matter where a capturing starting point is located in the preset transmitting period, the sampling capturing duration at least comprises a complete silence window; defining a sliding integral window, wherein the discrete points corresponding to the width of the sliding integral window are calculated according to the product of the preset proportion of the length of the silence window and the sampling rate; Moving the sliding integral window point by point on the acquired signal envelope, calculating arithmetic average values of all discrete waveform points in the coverage range of the current window, and generating a local average power sequence; Traversing the local average power sequence to locate a numerical min term, and determining the numerical min term as the minimum local average power.
5. The method for automatically detecting and evaluating the radio frequency performance limit of the multi-antenna wireless device according to claim 1, wherein the constructing the automatic detection topology specifically comprises: Setting a program-controlled radio frequency switch matrix, wherein the program-controlled radio frequency switch matrix comprises independent radio frequency switching units, the number of which is consistent with that of the radio frequency ports of the multi-antenna wireless equipment, and each independent radio frequency switching unit is configured with a public end connected to the corresponding radio frequency port, a first gating end connected to a vector signal analyzer and a second gating end connected to an external load assembly; The independent radio frequency switching unit connected with the target port is controlled to be communicated with the public end and the first gating end, so that a measuring channel connected with the vector signal analyzer is conducted; And controlling the independent radio frequency switching units connected with all the interference ports to communicate the common end with the second gating end, so as to conduct and connect a load path of the external load assembly, wherein the external load assembly consists of a high-power fixed attenuator or a matched load, and the power dissipation capacity of the external load assembly is not less than 1.5 times of the maximum transmission power of a single port of the multi-antenna wireless device.
6. The method for automatically detecting and evaluating the radio frequency performance limit of a multi-antenna wireless device according to claim 1, wherein the performing step of the thermal steady-state drift analysis specifically comprises: in a thermal steady state evaluation time window, controlling a transmitting duty ratio of the target port and the interference port in a synchronous concurrent transmitting state of the full port as an original high transmitting duty ratio, continuously collecting an error vector amplitude instantaneous value of the target port, and constructing a time sequence data set; Fitting the time series data set by using a least square linear regression model to extract a linear drift slope; and comparing the linear drift slope with a preset thermal drift slope threshold, and judging that the thermal steady-state test is passed if the thermal drift slope threshold is not exceeded.
7. The method of claim 6, wherein if the linear drift slope is greater than the thermal drift slope threshold, performing an attribution analysis as follows: Keeping the emission parameters of the target ports unchanged, controlling all the interference ports to be reduced from the original high emission duty ratio to the target emission duty ratio according to a preset duty ratio attenuation step length, and recalculating a secondary linear drift slope; Calculating the percentage of the difference between the linear drift slope and the secondary linear drift slope relative to the linear drift slope as a thermal sensitivity factor; And if the thermal sensitivity factor is not smaller than the attribution judgment threshold, judging as the system-level thermal limit, and if the thermal sensitivity factor is smaller than the attribution judgment threshold, judging as the device-level thermal limit.
8. The method for automatically detecting and evaluating the radio frequency performance limit of the multi-antenna wireless device according to claim 1, wherein the performing the automatic search for the radio frequency performance limit on the target port specifically comprises: Controlling the plurality of radio frequency ports to synchronously transmit according to the current global transmitting power, collecting baseband in-phase quadrature data and spectrum scanning track data of the target port after a set period of stable residence time, and calculating root mean square error vector amplitude and spectrum transmitting mask; If the root mean square error vector amplitude does not exceed a preset error vector amplitude threshold value and the spectrum emission mask judges that no mask violation event is found, a power climbing step resolution is increased and then scanning is continued; And if the root mean square error vector amplitude is larger than the error vector amplitude threshold or the spectrum emission mask judges that the mask violation event is found, the current global emission power is backed off by one power climbing step resolution, and the power climbing step resolution is recorded as the preliminary limit power point.
9. The method for automatically detecting and evaluating radio frequency performance limits of a multi-antenna wireless device according to claim 1, wherein the generating an evaluation report of the radio frequency performance limits of the multi-antenna wireless device comprises: Calculating the difference value between the maximum value and the minimum value in all the effective limit power values as the consistency range, and marking a process discreteness alarm in an evaluation report if the consistency range is larger than a consistency tolerance threshold; And selecting the minimum value in all the effective limit power values, subtracting a preset safety margin factor, confirming the minimum value as the rated power of the whole machine of the multi-antenna wireless equipment, and writing the rated power of the whole machine into the evaluation report.
10. An automatic detection and evaluation system for radio frequency performance limit of a multi-antenna wireless device, which is characterized in that the automatic detection and evaluation method applied to the radio frequency performance limit of the multi-antenna wireless device as claimed in any one of claims 1 to 9 comprises the following steps: The topology and excitation control module is used for defining one radio frequency port to be tested currently as a target port and defining all radio frequency ports except the target port as interference ports for multi-antenna wireless equipment with a plurality of radio frequency ports, constructing an automatic detection topology by setting a program-controlled radio frequency switch matrix connected with an external load component with the power dissipation capacity not less than 1.5 times of the maximum transmission power of a single port of the multi-antenna wireless equipment, and controlling the multi-antenna wireless equipment to enter a full-port synchronous concurrent transmission state; The power limit searching module is used for executing automatic searching of radio frequency performance limits on the target port in the full-port synchronous concurrent transmitting state, acquiring baseband in-phase and quadrature data, and utilizing root mean square error vector amplitude and a frequency spectrum transmitting mask to carry out signal quality judgment so as to lock a preliminary limit power point; a comprehensive steady-state verification module for maintaining an operational state of the multi-antenna wireless device, performing a multi-dimensional performance assessment including thermal steady-state drift analysis and environmental isolation verification based on silence window in-band leakage power calculation at the preliminary limit power point, thereby confirming an effective limit power value; The global evaluation generation module is used for managing logic traversing each radio frequency port of the multi-antenna wireless equipment so as to trigger repeated operation of the module, calculating the complete machine rated power with extremely poor consistency and subtracting a preset safety margin factor based on the summarized effective limit power values, and generating an evaluation report of the radio frequency performance limit of the multi-antenna wireless equipment, wherein the evaluation report comprises a process discreteness alarm and the complete machine rated power.

Description

Automatic detection and evaluation method and system for radio frequency performance limit of multi-antenna wireless equipment Technical Field The invention relates to the technical field of wireless communication testing, in particular to an automatic detection and evaluation method and system for the radio frequency performance limit of multi-antenna wireless equipment. Background With the development of wireless communication technology, multi-antenna wireless devices (such as MIMO access points, base stations, etc.) have been widely used. In performing radio frequency performance limit evaluations on such devices, existing test methods typically employ a single port polling test or a multi-port asynchronous transmission mode. The test mode cannot effectively simulate transient load impact of all radio frequency ports on a power supply system in a full-power concurrency state, and cannot reproduce a complex electromagnetic crosstalk environment, so that a test result is difficult to reflect the real performance of equipment under a multi-channel full-load working condition, and the problem of signal quality deterioration caused by insufficient transient power supply or voltage drop of the power supply is easily missed. In addition, when evaluating electromagnetic isolation between multiple ports, conventional methods have difficulty in real-time measurement while maintaining thermal load and operating state of all-port concurrent emissions. In the prior art, the transmission sequence of the target port is required to be completely interrupted to measure interference noise, which damages the thermal steady-state environment originally established by the equipment, and the in-band leakage power of the adjacent interference channel to the target channel in the actual high-load operation process cannot be accurately quantified, so that the phenomenon of the virtual high performance evaluation result caused by insufficient electromagnetic isolation is difficult to identify. Meanwhile, when the multi-antenna device runs under high load for a long time and has radio frequency performance drift or decay, the existing test means can only judge whether the test passes according to a final index (such as error vector amplitude) and lack an effective attribution analysis mechanism. It is difficult for a tester to distinguish whether the performance degradation is due to a design bottleneck (system-level thermal limitation) of the whole heat dissipation system or a defect (device-level thermal limitation) of a device in a specific radio frequency link, which brings positioning difficulty to subsequent hardware optimization design and production process improvement. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an automatic detection and evaluation method and an automatic detection and evaluation system for the radio frequency performance limit of multi-antenna wireless equipment, which solve the problems that in the radio frequency performance evaluation of the existing multi-antenna wireless equipment, the heat accumulation effect and the electromagnetic crosstalk environment during multi-port full-power concurrency are difficult to accurately reproduce in a laboratory environment, the measured performance limit value cannot truly reflect the reliability of the equipment under the extreme working condition, and the device-level defect and the system-level heat dissipation bottleneck are difficult to distinguish. In order to achieve the above purpose, the invention is realized by the following technical scheme: The first aspect of the invention provides an automatic detection and evaluation method for radio frequency performance limit of multi-antenna wireless equipment. The method aims at equipment with a plurality of radio frequency ports, one radio frequency port to be tested is defined as a target port, and all other radio frequency ports are defined as interference ports. By constructing an automatic detection topology with an external load component connected, the control device enters a full-port synchronous concurrent transmission state. In this state, power search is performed on the target port to lock the preliminary limit power point, and the operation state is maintained at the power point, evaluation including thermal steady-state drift analysis and environmental isolation verification is performed, and finally, the overall rated power and process consistency of the device are determined by traversing all ports. Preferably, when the multi-antenna wireless device is controlled to enter a full-port synchronous concurrent transmission state, an instruction is sent to a baseband control unit to close a carrier sense multiple access mechanism or shield an idle channel assessment function, so that a forced transmission mode is entered. In this mode, all of the interference ports are configured to a preset interference duty cycle. And meanwhile, controlling the time dif