CN106452611B - Radio frequency test method and system - Google Patents
Radio frequency test method and system Download PDFInfo
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- CN106452611B CN106452611B CN201610890042.6A CN201610890042A CN106452611B CN 106452611 B CN106452611 B CN 106452611B CN 201610890042 A CN201610890042 A CN 201610890042A CN 106452611 B CN106452611 B CN 106452611B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0087—Monitoring; Testing using service channels; using auxiliary channels using auxiliary channels or channel simulators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention is suitable for the field of test technology, provides radio frequency test method and system, comprising: equipment under test outputs signals to attenuator；Attenuator receives the signal and deamplification of the equipment under test, and the signal after decaying is output to test equipment；Test equipment receives the signal after the decaying, and the deamplification received is converted to digital signal and is recorded and is output to development board；Development board receives the digital signal of the test equipment output and is output to test computer after being handled the digital signal received；It tests computer and calculates the development board treated data, obtain test parameter.The signal of test equipment output is received by development board in the present invention and handles signal, realizes the accurate positioning and test of the equipment under test under unshielded strongly disturbing strong environment, and testing efficiency is high, testing cost is low.
Description
Technical field
The invention belongs to the field of test technology more particularly to radio frequency test method and systems.
Background technique
With popularizing for mobile communication facility, it is special that individual's access online scheme increasingly shows diversification network insertion
Point.In order to adapt to this variation, unprecedented prosperity is presented in wireless network terminal access product market.
The radio function test of current production has the most important test item of five classes, almost becomes each wireless telecommunications and produces
The indispensable radio function test item of product, comprising: frequency deviation, spectrum mask (Spectrum Mask), transmission power, error vector width
Spend (Error Vector Magnitude, EVM), receiving sensitivity.Above five tests do not need equipment under test (Device
Under Test, DUT) and the practical networking of test equipment, generally it is connected by thimble jig and radio frequency line with test equipment, is used tricks
Calculation machine grabs test equipment feedback data.It, may be same since the produced product in workshop is various in actual production test
There is dozens of wireless product doing wireless test simultaneously in workshop；Particularly, due to quick in order to pursue production, part is wireless office
1,6,11 3 channel of domain net (Wireless Fidelity, Wifi) product integrated test, so the frequency range in workshop
It is the serious problem of a comparison that radio frequency engineering, which tests crosstalk and interference,.It is usual: workshop using metallic shield case can effectively every
From the mutual radio frequency interference of DUT in environment, but the low and traditional metallic shield case of traditional metallic shield case testing efficiency
It is at high cost.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of radio frequency test method and system, it is intended to solve current radio frequency testing
Low efficiency and problem at high cost.
The embodiments of the present invention are implemented as follows, a kind of radio frequency test method, comprising:
Equipment under test outputs signals to attenuator；
Attenuator receives the signal and deamplification of the equipment under test, and the signal after decaying is output to tester
Device；
Test equipment receives the signal after the decaying, and the deamplification received is converted to digital signal and is remembered
It records and is output to development board；
Development board is defeated after receiving the digital signal of the test equipment output and being handled the digital signal received
Test computer is arrived out；
It tests computer and calculates the development board treated data, obtain test parameter.
The another object of the embodiment of the present invention is to provide a kind of radio frequency test system, comprising:
Equipment under test, for outputting signals to attenuator；
Signal after decaying for receiving the signal and deamplification of the equipment under test, and is output to survey by attenuator
Test instrument；
The deamplification received for receiving the transmitting signal after the decaying, and is converted to number by test equipment
Signal is recorded and is output to development board；
Development board, for receiving the digital signal of the test equipment output and handling the digital signal received
After be output to test computer；
Computer is tested, data that treated for calculating the development board obtain test parameter.
In embodiments of the present invention, the signal of test equipment output is received by development board and handles signal, it is real
The accurate positioning and test of equipment under test under present unshielded strongly disturbing strong environment, and testing efficiency is high.
Detailed description of the invention
Fig. 1 is the flow chart of radio frequency test method provided in an embodiment of the present invention；
Fig. 2 is the flow chart of radio frequency test method development board processing data provided in an embodiment of the present invention；
Fig. 3 is radio frequency test method development board processing signal schematic representation provided in an embodiment of the present invention；
Fig. 4 is the emission process flow chart of radio frequency test method provided in an embodiment of the present invention；
Fig. 5 is the receive process flow chart of radio frequency test system provided in an embodiment of the present invention；
Fig. 6 is the structural block diagram of radio frequency test system provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, being the flow chart of radio frequency test method provided in an embodiment of the present invention.
In S101, equipment under test outputs signals to attenuator.
The equipment under test includes: ZigBee product, blue tooth products, digital subscriber line (X with radio function
Digital Subscriber Line, XDSL) product (X indicate any character or character string), with wireless lan function
Power line communication (Wireless Power Line Communication, WPLC) product, access point (Acess Point, AP)
Product, routing product, modulation /demodulation product, fiber products, switch device and intelligent wireless product etc..
Preferably, in the same test workshop, different equipment under tests uses different frequency range calibration programs.Such as:
Certain period workshop 1,6,11 3 channel of produced A equipment under test detection calibration, then with the time with workshop B quilt produced
2,7,12 3 channels of measurement equipment detection calibration, while with workshop C equipment under test produced then detection calibration 3,8,13 3
Channel.
If the diminution frequency domain version of the countries such as North America or Israel then using other, do not surveyed by interactive channel
Examination calibration.
The frequency domain version that reduces refers to: the channel and frequency domain of China's wifi standard are than the country such as North America or Israel
The channel and frequency domain of wifi standard are more, therefore the channel and frequency domain of the wifi standard of the countries such as North America or Israel
Referred to as reduce frequency domain version.
In S102, attenuator receives the signal and deamplification of the DUT, and the signal after decaying is output to test
Instrument.
Preferably, the attenuator is 10dB or 20dB attenuator, for protecting test equipment.
In S103, test equipment receives the signal after the decaying, and the deamplification received is converted to number
Signal is recorded and is output to development board.
Preferably, after the test frequency range unified planning of Workshop Production product, test equipment can receive all wireless
Signal, the deamplification that test equipment receives are analog signal, and test equipment converts analog signals into digital signal and is subject to
Record, it is recorded to be output to without compression based on field programmable gate array (Field by test equipment
Programmable Gate Array, FPGA) and the high performance four cores embedded board of ARM Cortex-A9.
In S104, development board receives the digital signal of the test equipment output and carries out the digital signal received
Test computer is output to after processing.
As shown in Fig. 2, the development board receives the digital signal of the test equipment output and believes the number received
Test computer is output to after number being handled includes:
In S201, development board receives the digital signal of the test equipment output.
In S202, development board carries out pressure tight sampling to the digital signal received.
Development board carries out pressure tight sampling to the digital signal received
Development board produces test equipment using 36 channel, 32 bit (bit) sampling and adopts to the digital signal progress fidelity received
Sample.
In S202, development board is filtered the digital signal after sampling.
The digital signal received is filtered by the development board
Low-pass filtering filter high-frequency clutter；
The conduction of high-pass filtering filtering low.
Bandpass filtering is obtained after low-pass filtering and high-pass filtering, the signal data of non-this product line is passed through into frequency domain
Difference be distinguish and give up, it is ensured that follow-up data processing is analyzed only for the product data of this product line.
Preferably, although environmental disturbances noise is similar to white noise, however, to ensure that detection calibration precision, can not filter
Increase white noise decay algorithm before wave.
Low-pass filtering and high-pass filtering are software realization, and by the way that parameter is rationally arranged, the decaying of filter can be fixed,
And the decaying of the filter is merged with the line loss of RF connection.
In S203, the development board carries out elimination co-channel interference to the digital signal after the filtering processing.
Digital signal by filtering processing only includes the product signal that current production line needs detection calibration, but same
Product line is likely to be breached 1-32 platform product according to production capacity and tests simultaneously in neighbouring station, in order to further increase detection calibration essence
Degree distinguishes the signal of adjacent same type product on same production line, is accurately positioned to equipment under test, to the letter filtered
Number needs further discriminate between, i.e., to carry out elimination co-channel interference to the digital signal after the filtering processing.
Preferably, the algorithm of co-channel interference is eliminated using successive ignition to eliminate homogenous frequency signal between same model equipment under test and do
It disturbs.
Specifically, anti-interference vector iterative recursive algorithm are as follows:
Wherein μ be determine convergence and adaptive speed compensation factor, p [k], d [k] be filtering initialization complete zero to
Amount, a [k] are desired signal, and r [k] is filter projection, and c is power factor, and c is that positive integer can make algorithm is opposite to be easier
It is realized with C language, usual c=1, meeting value c=2 calculates only on the significant power AP of a small number of coverage cells to optimize
Method.
It is iterated to calculate by above-mentioned first time, generally still has 20% or so background interference, interference characteristic is similar to orange
Coloured noise, it is therefore desirable to second of iteration elimination background interference.It can be obtained after carrying out second iteration to above-mentioned first time iterative algorithm:
Equipment under test DUT original signal feature can be restored without distortions by second iteration, carry out EVM, MASK, frequency deviation
Equal test analysis.
Higher precision can be obtained by improving the number of iterations, but since operand is huge, not only cause production that can not bear
The no practical significance of the promotion of the delay and precision received.
As shown in figure 3, being radio frequency test method development board processing signal schematic representation provided in an embodiment of the present invention, specifically
Ground:
Fig. 3 (a) is that development board is received containing co-channel interference signal schematic representation；
Fig. 3 (b) is the signal schematic representation after development board first time iterative filtering；
Fig. 3 (c) is the signal schematic representation after second of iterative filtering of development board；
Fig. 3 (d) is the signal schematic representation that development board restores that DUT initially sends waveform.
Wherein abscissa states signal frequency in Fig. 3 (a)-(d), and ordinate is signal strength.
In S105, test computer calculates the development board treated data, obtains test parameter.
Preferably, equipment under test Initial Trans are calculated by following algorithm by development board treated data:
GAA(i)=SAA(i), i=0 (DC)
GAA(i)=2 × SAA(i), i=1 is arrived
Wherein, GAA(i) one-sided power spectrum, S are representedAA(i) bilateral power spectrum is represented, N represents the length of bilateral power spectrum.
Since the energy of half is shown in positive frequency, the other half energy is shown in negative frequency.Therefore, if list need to be converted to bilateral spectrum
Side frequency spectrum needs to give up the second part of array, and by the numerical value of first part multiplied by 2, to obtain original equipment under test transmitting
Power.
Similarly, the test parameters such as frequency deviation, spectrum mask, EVM are calculated using above-mentioned same algorithm, described to obtain
The test parameters such as transmission power, frequency deviation, spectrum mask, EVM restored the number of pure glitch-free transmitting wave characteristic completely
Signal.
Receiving sensitivity passes through Shannon's theorems testing scheme in production scene according to actual measurement signal-to-noise ratio, uses tester
Device sends data packet calculating by increasing the radio frequency wire rod of decaying.Additionally, equipment under test outputs signals to attenuator in S101
Include:
Equipment under test transmits signals to attenuator by testing the control of computer.
In conjunction with S102-S105, that is, radio frequency test method provided in an embodiment of the present invention emission process, as shown in Figure 4.
Additionally, equipment under test outputs signals to attenuator and includes: in S101
It tests computer or test equipment emits signal；
Equipment under test receives the signal of the test computer or test equipment transmitting and is output to attenuator.
In conjunction with S102-S105, that is, radio frequency test method provided in an embodiment of the present invention receive process, as shown in Figure 5.
Corresponding to a kind of radio frequency testing that the inventive embodiments provide, Fig. 6 shows one kind provided in an embodiment of the present invention
The structural block diagram of radio frequency test system, for ease of description, only the parts related to this embodiment are shown.
Referring to Fig. 6, which includes:
Equipment under test 61, for outputting signals to attenuator；
Attenuator 62 for receiving the signal and deamplification of the equipment under test, and the signal after decaying is output to
Test equipment；
The deamplification received for receiving the transmitting signal after the decaying, and is converted to number by test equipment 63
Word signal is recorded and is output to development board；
Development board 64, for receive test equipment output digital signal and will be at the digital signal that received
Test computer is output to after reason；
Computer 65 is tested, data that treated for calculating the development board obtain test parameter.
In same test workshop, the calibration frequency range of different equipment under tests 61 is different.
The development board 64 includes:
Development board receives the digital signal of the test equipment output；
Development board carries out pressure tight sampling to the digital signal received；
The development board is filtered the digital signal after sampling；
The development board carries out elimination co-channel interference to the digital signal after the filtering processing.
The equipment under test 61 includes:
Equipment under test transmits signals to attenuator by testing the control of computer.
The equipment under test 61 includes:
It tests computer or test equipment emits signal；
Equipment under test receives the signal of the test computer or test equipment transmitting and is output to attenuator.
In embodiments of the present invention, different products uses different frequency range calibration programs, by introducing development board, and leads to
It crosses development board and eliminates environmental disturbances, guarantee that test port receives unique test signal, and then in unshielded strongly disturbing ring
The accurate positionin and test to equipment under test are realized under border.Testing efficiency of the embodiment of the present invention is high, and due to the test space not office
Limit can not only promote the non-contacting manifold type testing scheme of high-speed and high-efficiency in shielded box, and can also save a large amount of
Shielded box isolation liner in, working hours of the to maintain equipments and manufacture, maintenance and replacement such as sealing strip tooling stationary fixture.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of radio frequency test method characterized by comprising
Equipment under test outputs signals to attenuator；
Attenuator receives the signal and deamplification of the equipment under test, and the signal after decaying is output to test equipment；
Test equipment receives the signal after the decaying, and the deamplification received is converted to digital signal and is recorded simultaneously
It is output to development board；
Development board receives the digital signal of the test equipment output and is output to after being handled the digital signal received
Test computer；
It tests computer and calculates the development board treated data, obtain the test parameter of the equipment under test；
In same test workshop, the calibration frequency range of different equipment under tests is different；
The development board is defeated after receiving the digital signal of the test equipment output and being handled the digital signal received
Arriving test computer out includes:
Development board receives the digital signal of the test equipment output；
Development board carries out pressure tight sampling to the digital signal received；
The development board is filtered the digital signal after sampling；
The development board carries out elimination co-channel interference to the digital signal after the filtering processing.
2. the method as described in claim 1, which is characterized in that equipment under test outputs signals to attenuator and includes:
Equipment under test transmits signals to attenuator by testing the control of computer.
3. the method as described in claim 1, which is characterized in that equipment under test outputs signals to attenuator and includes:
It tests computer or test equipment emits signal；
Equipment under test receives the signal of the test computer or test equipment transmitting and is output to attenuator.
4. a kind of radio frequency test system characterized by comprising
Equipment under test, for outputting signals to attenuator；
Signal after decaying for receiving the signal and deamplification of the equipment under test, and is output to tester by attenuator
Device；
The deamplification received for receiving the transmitting signal after the decaying, and is converted to digital signal by test equipment
It is recorded and is output to development board；
Development board, for defeated after receiving the digital signal of the test equipment output and being handled the digital signal received
Test computer is arrived out；
Computer is tested, data that treated for calculating the development board obtain test parameter；
In same test workshop, the calibration frequency range of different equipment under tests is different；
Wherein development board is used to receive the digital signal of the test equipment output and handles the digital signal received
After be output to test computer, specifically include:
Development board receives the digital signal of the test equipment output；
Development board carries out pressure tight sampling to the digital signal received；
The development board is filtered the digital signal after sampling；
The development board carries out elimination co-channel interference to the digital signal after the filtering processing.
5. system as claimed in claim 4, which is characterized in that equipment under test is transmitted signals to by testing the control of computer
Attenuator.
6. system as claimed in claim 4, which is characterized in that
It tests computer or test equipment emits signal；
Equipment under test receives the signal of the test computer or test equipment transmitting and is output to attenuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610890042.6A CN106452611B (en) | 2016-10-11 | 2016-10-11 | Radio frequency test method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610890042.6A CN106452611B (en) | 2016-10-11 | 2016-10-11 | Radio frequency test method and system |
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| CN106452611A CN106452611A (en) | 2017-02-22 |
| CN106452611B true CN106452611B (en) | 2019-04-23 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108241089A (en) * | 2018-01-09 | 2018-07-03 | 成都秦川物联网科技股份有限公司 | Detection device |
| CN111212443B (en) * | 2020-01-02 | 2023-03-28 | 江苏唯侓机器人科技有限公司 | Intelligent detection system and method for WIFI signals of underground garage |
| CN112637892B (en) * | 2021-01-04 | 2022-11-08 | 深圳市吉祥腾达科技有限公司 | Method for testing user experience satisfaction index of WIFI product |
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| CN102571239A (en) * | 2012-01-13 | 2012-07-11 | 中兴通讯股份有限公司 | Test system for radio frequency index |
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| CN104754093A (en) * | 2013-12-25 | 2015-07-01 | 北京信威通信技术股份有限公司 | Test device, system and method |
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| CN101944962A (en) * | 2010-09-02 | 2011-01-12 | 湖北众友科技实业股份有限公司 | Method and device for testing radio frequency performance of multiple TD-LTE (TD-SCDMA long term evolution) terminals simultaneously |
| CN102571239A (en) * | 2012-01-13 | 2012-07-11 | 中兴通讯股份有限公司 | Test system for radio frequency index |
| CN104754093A (en) * | 2013-12-25 | 2015-07-01 | 北京信威通信技术股份有限公司 | Test device, system and method |
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