CN103957540A - Electromagnetic interference testing method of multimode multi-standby terminal - Google Patents
Electromagnetic interference testing method of multimode multi-standby terminal Download PDFInfo
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Abstract
An electromagnetic interference testing method of a multimode multi-standby terminal is characterized in that first, the TIS at a single-shot state of a tested module is measured first, and the spatial orientation and the polarization where the antenna receiving sensitivity is the highest are located; then on the spatial orientation and the polarization, according to a method provided at a previous stage, proper basic station downlink emitting power is set, the error probability under a multimode concurrence working state of the tested module is tested in a sweep mode, and a channel with the worst receptivity is found; finally the TIS performance of the worst channel under the multimode concurrence state of the tested module is tested; and by comparing the TIS of the worst channel under the multimode concurrence state with the TIS testing result under the single-shot state, the electromagnetic interference degree on the tested module form other modules is obtained. The problem of electromagnetic interference degree testing under the multimode concurrence state and receiving sensitivity testing is solved, and the scientific basis is provided for multimode multi-standby terminal product further improving and frequency planning during network distribution.
Description
Technical field
The invention belongs to wireless communication technology field, particularly under the environment of multiple communication network modes coexist, the test macro of electromagnetic interference and method of testing between the wireless module of multi-mode multi-standby terminal different mode.
Background technology
2G, 3G and 4G network will coexist in the future for a long period of time, simultaneously, along with developing rapidly of heterogeneous network, conventional cellular network and other wireless technology are as WLAN (wireless local area network) (Wireless Local Area Network, WLAN) fusion between becomes a kind of development trend, can provide better experience for user.Therefore, following multiple network pattern is by long-term co-existence.
Under the environment of multiple network modes coexist, each operator and manufacturer terminal have carried out research and the design of multi-mode multi-standby terminal.Singly treat that with tradition terminal compares, multi-mode multi-standby terminal disposes the wireless module of multiple different mode, can support multiple wireless-access mode to receive and dispatch simultaneously, and the network service of various modes is provided.During the concurrent work of a plurality of modules of multi-mode multi-standby terminal, up the transmitting of any one module may be passed through the receiving element of other module of antenna feed-in, and other module is formed and disturbed, and affects the down-link reception performance of other module.In order to ensure multi-mode multi-standby terminal, the electromagnetic interference between each module is controlled in allowed band, during the concurrent work of multimode group, still keep good receiving sensitivity, need to electromagnetic interference degree and the receiving sensitivity under the concurrent state of multimode test multi-mode multi-standby terminal.
(Over-the-Air, the OTA) test of eating dishes without rice or wine has reflected radiation and the receptivity of terminal in space, is the important means that detects wireless terminal spacial radio frequency performance.Tradition singly treats that the OTA method of testing of terminal is comparatively ripe, adopts total omnidirectional sensitivity (Total Isotropic Sensitivity, TIS) to weigh the space receiving sensitivity of terminal, the descending receiving ability of reflection terminal.For multi-mode multi-standby terminal, electromagnetic interference degree and the receiving sensitivity of how to test under the concurrent state of multimode are the current problems facing.
Traditional OTA TIS test, for singly treating Terminal Design, can not directly apply to the receiving sensitivity test of multi-mode multi-standby terminal.Tradition singly treats that terminal TIS index difference on each channel in each frequency range is little, therefore can be only while testing TIS the minimum, middle of tested frequency range or Senior Three channel be measured, its result can reflect the TIS performance of terminal in whole frequency range to a certain extent.But when in multi-mode multi-standby terminal, a certain module is tested, except tested module, other module can produce and disturb tested module when work, and between this module, disturb often not full frequency band interference, and just local channel in tested module working frequency range is exerted an influence.In addition, tested module the most serious disturbed channel is not likely the minimum, middle of its working frequency range or high channel.Therefore when multi-mode multi-standby terminal is in the concurrent operating state of multimode lower time, it is inadequate in tested frequency range, only selecting that several representative channel test, and must carry out full frequency band sweep check and test its receptivity on each channel in whole band limits.
To multi-mode multi-standby terminal, except obtaining the poorest TIS of each module under the concurrent operating state of multimode, test result also needs to reflect between each module of terminal the degree of strength of electromagnetic interference on different frequency range, so that the frequency planning for the further improvement of terminal and while arranging net provides reference frame.
Summary of the invention
Shortcomings and deficiencies based on traditional OTA TIS test macro and method of testing, the application proposes a kind of test macro and method of testing of multi-mode multi-standby terminal electromagnetic interference, by the power of the tested module of sweep check suffered electromagnetic interference on each channel, and test obtains the TIS result on channel that disturbed degree is the strongest, for reflecting the electromagnetic interference degree under the concurrent state of multimode.
The object of the present invention is achieved like this: a kind of electromagnetic interference test system of multi-mode multi-standby terminal, by measuring antenna, two group communication antennas, two base station simulators and turret systems form, it is characterized in that: signal transitive relation is: in test measured terminal module A during to the electromagnetic interference of module B, the base station simulator output downstream signal that module B is corresponding, by measuring aerial radiation to measured terminal, up the transmitting of measured terminal module B is connected to module B base station simulator by a group communication antenna, thereby set up test communications loop between terminal module B and its base station simulator, in addition, between measured terminal module A and its base station simulator, by another group communication antenna, set up its communications loop, coordinate after turret systems, measuring terminals module B is in three dimensions receiving sensitivity at any angle, and final integration obtains Qi Zong omnidirectional receiving sensitivity, by switch module A base station simulator, measure respectively module B under single-engine operation state and with the concurrent operating state of module A bimodulus under receiving sensitivity, by the setting of above-mentioned test macro and signal transitive relation, the electromagnetic interference environment of simulation multi-mode multi-standby terminal is also tested the annoyance level between a plurality of modules of multi-mode multi-standby terminal.
The Electromagnetic Interference Test method of a kind of multi-mode multi-standby terminal of the present invention, is characterized in that: while carrying out multi-mode multi-standby terminal Electromagnetic Interference Test, first measure tested module at the TIS of single-engine run, locate its antenna reception sensitivity the strongest dimensional orientation and polarization; Then in this dimensional orientation and polarization, the method proposing according to the preceding paragraph arranges suitable base station down transmitting power, and the error probability of the tested module of sweep check under the concurrent operating state of multimode, finds the poorest channel of its receptivity; The TIS performance of the tested module of last test difference channel under the concurrent state of multimode; TIS and its TIS test result under single-engine run by difference channel under contrast multimode concurrent state, show that tested module is subject to the degree of other module electromagnetic interference; Concrete testing procedure is as follows:
1). close interference module A, test tested module B under single-engine run, at the TIS of the basic, normal, high channel of tested frequency range;
2). according to step 1 test result, determine that the optimum sensitivity of tested module B between basic, normal, high channel region put corresponding dimensional orientation, measure polarization and the base station down forward power of antenna;
3). open interference module A, make it with maximum power transmission, make terminal works at the concurrent state of multimode;
4). each frequency selects a nearest channel as with reference to channel from basic, normal, high channel, then according to the TIS test result of reference channel, determines base station down power;
5). under the definite base station down power condition of the determined dimensional orientation of step 2, antenna polarization and step 4, the descending error probability of the disturbed module B of sweep measurement on each channel;
6). by the highest channel group cooperation of error probability, be the difference channel combination of tested module, measure the TIS of the concurrent state of multimode when this channel combination.
Single-point sensitivity corresponding descending power and the rollback factor sum of the reference channel that base station down power determination of the present invention is this frequency in optimal spatial sensitive direction; If optimum single-point sensitivity is better than singly treating the TIS limit value under scene, the rollback factor equals the poor of TIS limit value and the optimum single-point sensitivity of reference channel; Otherwise the rollback factor equals zero.
The present invention has following remarkable technological progress: by the Electromagnetic Interference Test method of multi-mode multi-standby terminal of the present invention, the electromagnetic interference situation that can reflect multi-mode multi-standby terminal objective and accurately, solved electromagnetic interference degree under the concurrent state of multimode and a test difficult problem for receiving sensitivity, the frequency planning for the further improvement of multi-mode multi-standby terminal product and while arranging net provides scientific basis.
Accompanying drawing explanation
Fig. 1 is test macro block diagram of the present invention
Fig. 2 is that front and back link power is adjusted schematic diagram
Embodiment
Multimode terminal Electromagnetic Interference Test can be tested by traditional OTA darkroom, and test macro as shown in Figure 1, wherein mainly comprises and measures antenna, two group communication antennas, two base station simulators and turret systems etc.In test measured terminal module A during to the electromagnetic interference of module B, the base station simulator output downstream signal that module B is corresponding, by measuring aerial radiation to measured terminal, up the transmitting of measured terminal module B is connected to module B base station simulator by a group communication antenna, thereby between terminal module B and its base station simulator, set up test communications loop, as shown in solid-line signals in Fig. 1.In addition, between measured terminal module A and its base station simulator, by another group communication antenna, set up its communications loop, as shown in dotted line signal in Fig. 1.Coordinate after turret systems, test macro can measuring terminals module B in three dimensions receiving sensitivity at any angle, and final integration obtains Qi Zong omnidirectional receiving sensitivity.By switch module A base station simulator, can measure respectively module B under single-engine operation state and with the concurrent operating state of module A bimodulus under receiving sensitivity.This test macro can be simulated the electromagnetic interference environment of multi-mode multi-standby terminal.
Singly treat that terminal generally characterizes its terminal receptivity with TIS, but need to test a plurality of channels in tested frequency range while carrying out full frequency band sweep check, if each channel is tested respectively to its TIS, testing time cost is too large.Space single-point error probability test can reflect the size of the disturbed degree of each frequency of tested frequency range, and greatly reduce the testing time, the means of testing of the method usage space single-point error probability that therefore, the application proposes carries out full frequency band sweep check to tested frequency range.
During the test of usage space single-point error probability, need in terminal optimum sensitivity dimensional orientation and polarization, under given base station down transmitting power, test, must determine a base station down transmitting power.The too high channel error rate test result that may cause of base station down transmitting power is 0% entirely, the too low test result that may cause is 100% entirely, all the worst channel of performance cannot be from each channel, found out, therefore a suitable base station down power must be chosen.Through a large amount of test experiments, single-point sensitivity corresponding descending power and the rollback factor sum of the reference channel that the method for testing that the application proposes is this frequency by base station down power determination on each tested frequency in optimal spatial sensitive direction.If optimum single-point sensitivity is less than the TIS limit value of singly treating under scene, the rollback factor equals the poor of TIS limit value and the optimum single-point sensitivity of reference channel; Otherwise the rollback factor equals zero.
While carrying out multi-mode multi-standby terminal Electromagnetic Interference Test, tested module be can first measure at the TIS of single-engine run, its antenna reception sensitivity the strongest dimensional orientation and polarization located; Then in this dimensional orientation and polarization, the method proposing according to the preceding paragraph arranges suitable base station down transmitting power, and the error probability of the tested module of sweep check under the concurrent operating state of multimode, finds the poorest channel of its receptivity; The TIS performance of the tested module of last test difference channel under the concurrent state of multimode.By TIS and its TIS test result under single-engine run of difference channel under contrast multimode concurrent state, can estimate that tested module is subject to the degree of other module electromagnetic interference.Concrete steps are as follows:
1) close interference module A, test tested module B under single-engine run, at the TIS of the basic, normal, high channel of tested frequency range;
2), according to step 1 test result, determine that the optimum sensitivity of tested module B between basic, normal, high channel region put corresponding dimensional orientation, measure polarization and the base station down forward power EIS of antenna
peak;
3) open interference module A, make it with maximum power transmission, make terminal works at the concurrent state of multimode;
4) each frequency selects a nearest channel as with reference to channel from basic, normal, high channel, then according to the TIS test result of reference channel, determines base station down power.Base station down power BS_DL_Pwr
abe set to:
BS_DL_Pwr
A(dBm)＝EIS
Peak(dBm)+Δ
Ref-TIRS(dB)
Wherein, Δ
ref-TIRSfor disturbed module B deducts the TIS measurement result of module B in respective channels at high, medium and low channel Shang Zong omnidirectional receiving sensitivity maximum limit value, if do not meet the requirement of maximum limit value, Δ
ref-TIRSbe zero.Base station down power BS_DL_Pwr
acomputational methods as shown in Figure 2.
5) under the definite descending power condition of the determined dimensional orientation of step 2, antenna polarization and step 4, the descending error probability of the disturbed module B of sweep measurement on each channel;
6) by the highest channel group cooperation of error probability, be the difference channel combination of tested module, measure the TIS of the concurrent state of multimode when this channel combination;
By above-mentioned steps, not only obtained the power of tested module suffered electromagnetic interference on each channel, and and test obtained the TIS result on channel that disturbed degree is the strongest, can be for the electromagnetic interference degree under the concurrent state of reflection multimode.
Multimode terminal Electromagnetic Interference Test method innovation major embodiment of the present invention is as follows:
First be Design of Test System.The present invention has designed the electromagnetic interference test system of a multi-mode multi-standby terminal, can reflect accurately the electromagnetic interference situation of multi-mode multi-standby terminal.Next is determining of base station down power.Single-point sensitivity corresponding descending power and the rollback factor sum of the reference channel that base station down power determination of the present invention is this frequency in optimal spatial sensitive direction.If optimum single-point sensitivity is better than singly treating the TIS limit value under scene, the rollback factor equals the poor of TIS limit value and the optimum single-point sensitivity of reference channel; Otherwise the rollback factor equals zero.The 3rd is to adopt full frequency band sweep check.Tradition singly treats only to select in terminal OTA TIS test the minimum, middle of tested frequency range and Senior Three channel is measured, and we adopt full frequency band sweep check to reflect its receiving sensitivity on each channel to multimode terminal.By error probability, replace TIS to reduce the testing time.While carrying out full frequency band sweep check, as each channel is tested respectively to TIS, time cost is too large, so we test the quality that indirectly reflects each frequency receptivity by error probability.
Claims (3)
1. the electromagnetic interference test system of a multi-mode multi-standby terminal, by measuring antenna, two group communication antennas, two base station simulators and turret systems, form, it is characterized in that: signal transitive relation is: in test measured terminal module A during to the electromagnetic interference of module B, the base station simulator output downstream signal that module B is corresponding, by measuring aerial radiation to measured terminal, up the transmitting of measured terminal module B is connected to module B base station simulator by a group communication antenna, thereby sets up test communications loop between terminal module B and its base station simulator; In addition, between measured terminal module A and its base station simulator, by another group communication antenna, set up its communications loop; Coordinate after turret systems, measuring terminals module B is in three dimensions receiving sensitivity at any angle, and final integration obtains Qi Zong omnidirectional receiving sensitivity; By switch module A base station simulator, measure respectively module B under single-engine operation state and with the concurrent operating state of module A bimodulus under receiving sensitivity; By the setting of above-mentioned test macro and signal transitive relation, the electromagnetic interference environment of simulation multi-mode multi-standby terminal is also tested the annoyance level between a plurality of modules of multi-mode multi-standby terminal.
2. an Electromagnetic Interference Test method for multi-mode multi-standby terminal, is characterized in that: while carrying out multi-mode multi-standby terminal Electromagnetic Interference Test, first measure tested module at the TIS of single-engine run, locate its antenna reception sensitivity the strongest dimensional orientation and polarization; Then in this dimensional orientation and polarization, the method proposing according to the preceding paragraph arranges suitable base station down transmitting power, and the error probability of the tested module of sweep check under the concurrent operating state of multimode, finds the poorest channel of its receptivity; The TIS performance of the tested module of last test difference channel under the concurrent state of multimode; TIS and its TIS test result under single-engine run by difference channel under contrast multimode concurrent state, show that tested module is subject to the degree of other module electromagnetic interference; Concrete testing procedure is as follows:
1). close interference module A, test tested module B under single-engine run, at the TIS of the basic, normal, high channel of tested frequency range;
2). according to step 1 test result, determine that the optimum sensitivity of tested module B between basic, normal, high channel region put corresponding dimensional orientation, measure polarization and the base station down forward power of antenna;
3). open interference module A, make it with maximum power transmission, make terminal works at the concurrent state of multimode;
4). each frequency selects a nearest channel as with reference to channel from basic, normal, high channel, then according to the TIS test result of reference channel, determines base station down power;
5). under the definite base station down power condition of the determined dimensional orientation of step 2, antenna polarization and step 4, the descending error probability of the disturbed module B of sweep measurement on each channel;
6). by the highest channel group cooperation of error probability, be the difference channel combination of tested module, measure the TIS of the concurrent state of multimode when this channel combination.
3. the Electromagnetic Interference Test method of multi-mode multi-standby terminal according to claim 2, is characterized in that: single-point sensitivity corresponding descending power and the rollback factor sum of the reference channel that base station down power determination is this frequency in optimal spatial sensitive direction; If optimum single-point sensitivity is better than singly treating the TIS limit value under scene, the rollback factor equals the poor of TIS limit value and the optimum single-point sensitivity of reference channel; Otherwise the rollback factor equals zero.
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| CN106162722A (en) * | 2015-03-27 | 2016-11-23 | ***通信集团公司 | A kind of interference method for rapidly testing and system mutually |
| CN108513721A (en) * | 2018-02-24 | 2018-09-07 | 福建联迪商用设备有限公司 | Test method and system coexists in terminal LTE and Wi-Fi |
| CN109239490A (en) * | 2018-08-29 | 2019-01-18 | 中国空间技术研究院 | The EMC nargin test method of spaceborne receiver |
| CN111885623A (en) * | 2020-07-22 | 2020-11-03 | Oppo广东移动通信有限公司 | Interference testing method and device, terminal and storage medium |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988043A (en) * | 2015-01-30 | 2016-10-05 | 惠州市德赛西威汽车电子股份有限公司 | Manipulator test system applicable to electromagnetic interference environment and test method thereof |
| CN106162722A (en) * | 2015-03-27 | 2016-11-23 | ***通信集团公司 | A kind of interference method for rapidly testing and system mutually |
| CN106162722B (en) * | 2015-03-27 | 2019-06-25 | ***通信集团公司 | A kind of mutually interference method for rapidly testing and system |
| CN105182370A (en) * | 2015-06-25 | 2015-12-23 | 工业和信息化部电信研究院 | Beidou equipment inter-module electromagnetic interference test method |
| CN108513721A (en) * | 2018-02-24 | 2018-09-07 | 福建联迪商用设备有限公司 | Test method and system coexists in terminal LTE and Wi-Fi |
| CN109239490A (en) * | 2018-08-29 | 2019-01-18 | 中国空间技术研究院 | The EMC nargin test method of spaceborne receiver |
| CN109239490B (en) * | 2018-08-29 | 2021-02-09 | 中国空间技术研究院 | EMC margin test method of satellite-borne receiver |
| CN111885623A (en) * | 2020-07-22 | 2020-11-03 | Oppo广东移动通信有限公司 | Interference testing method and device, terminal and storage medium |
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Application publication date: 20140730 |