CN103051392B - Method and device for intermodulation interference test of wireless communication terminal of private network - Google Patents
Method and device for intermodulation interference test of wireless communication terminal of private network Download PDFInfo
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- CN103051392B CN103051392B CN201210500715.4A CN201210500715A CN103051392B CN 103051392 B CN103051392 B CN 103051392B CN 201210500715 A CN201210500715 A CN 201210500715A CN 103051392 B CN103051392 B CN 103051392B
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Abstract
The embodiment of the invention provides a method and a device for intermodulation interference test of a wireless communication terminal of a private network. The method mainly comprises the following steps of according to the requirements of a test specification for the intermodulation interference test of the wireless communication terminal of the private network, selecting a circulator from a circulator group by a coaxial switch to engage, and/or selecting an attenuator from an attenuator group by a coaxial switch to engage; and connecting the circulator group with the attenuator group, enabling the circulator group to receive the inputted tested signal of the wireless communication terminal of the private network, enabling the engaged circulator and/or the engaged attenuator to process the tested signal, and enabling the attenuator group to output the processed tested signal. The method and the system provided by the embodiment of the invention have the advantages that the problem of respective manual building of different test links due to different test specifications in the intermodulation interference test process of the wireless communication terminal of the private network is solved; and the system integration of all models of approved test links for radiation interference and radiation stray indexes in the wireless communication terminal of the private network is realized.
Description
Technical field
The present invention relates to private network wireless communication terminal technical field of measurement and test, particularly relate to a kind of method and apparatus private network wireless communication terminal being carried out to Intermodulation Interference test.
Background technology
Private network terminal radio frequency Auto-Test System refers to employing computer control, automatically complete and set up call, link switching, signal measurement, data computing the automatization test system outputed test result, the radio-frequency (RF) index test and the Auto-Test System that are mainly used in private network wireless communication terminal are built, and the radio-frequency (RF) index comprising private network wireless communication terminals such as digital handset, Digital Clustering, data radio station, analog-interphones is tested and Auto-Test System tower is built.
At present, private network wireless communication terminal is carried out in the process of private network Type Approval Intermodulation Interference test, for different Intermodulation Interference test events and standard, need to adopt and manually carry corresponding radio frequency link respectively to meet test request, sometimes, need manually to carry many test links completing in an Intermodulation Interference test process, this test mode not only inefficiency, and manually carry test link, can measure error be introduced, affect the accuracy of test result.
Summary of the invention
The embodiment provides a kind of method and apparatus private network wireless communication terminal being carried out to Intermodulation Interference test, to realize effectively carrying out Intermodulation Interference test to private network wireless communication terminal.
Private network wireless communication terminal is carried out to a method for Intermodulation Interference test, comprising:
According to the test specification requirement that the Intermodulation Interference of private network wireless communication terminal is tested, from circulator group, select connection circulator by coaxial switch, and/or; From attenuator group, connection attenuator is selected by coaxial switch; Described circulator group comprises the circulator of the multiple different models be connected in parallel, and described attenuator group comprises the attenuator of the multiple different models be connected in parallel, and described circulator group connects described attenuator group;
Described circulator group receives the measured signal of the private network wireless communication terminal of input, described measured signal is successively through described circulator group, attenuator group, utilize the circulator of connection and/or attenuator to process described measured signal, described attenuator group exports measured signal after treatment.
Private network wireless communication terminal is carried out to a device for Intermodulation Interference test, comprising:
Circulator group, attenuator group, and the first coaxial switch be connected with described circulator group, with the second coaxial switch that described attenuator group is connected, described circulator group connects described attenuator group;
According to the test specification requirement that the Intermodulation Interference of private network wireless communication terminal is tested, from circulator group, select connection circulator by described first coaxial switch, and/or; From attenuator group, connection attenuator is selected by described second coaxial switch;
Described circulator group receives the measured signal of the private network wireless communication terminal of input, described measured signal is successively through described circulator group, attenuator group, the attenuator connected in the circulator connected in described circulator group and/or described attenuator group processes described measured signal, and described amplifier group exports the measured signal after described device process.
The technical scheme provided as can be seen from the embodiment of the invention described above, the device carrying out Intermodulation Interference test to private network wireless communication terminal that the embodiment of the present invention provides is the professional private network Type Approval Intermodulation Interference test synthesis solution of a compact conformation, is applicable to the Auto-Test System application of private network Type Approval Intermodulation Interference test design verification, automatically test aspect.Overcome and carry out in Intermodulation Interference test process at private network wireless communication terminal, need the problem of manually building different test link respectively for different test specification, achieve the system integration of all Intermodulation Interference test links of private network wireless communication terminal.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of structure chart private network wireless communication terminal being carried out to the device of Intermodulation Interference test that Fig. 1 provides for the embodiment of the present invention one;
The connection diagram of 4 circulators that Fig. 2 provides for the embodiment of the present invention one and coaxial switch;
The connection diagram of 2 attenuators that Fig. 3 provides for the embodiment of the present invention one and coaxial switch;
Fig. 4 is when adopting above-mentioned 4 circulators, 2 attenuators, concrete structure figure private network wireless communication terminal being carried out to the device of Intermodulation Interference test that the embodiment of the present invention one provides;
A kind of process chart private network wireless communication terminal being carried out to the method for Intermodulation Interference test that Fig. 5 provides for the embodiment of the present invention two;
A kind of test philosophy schematic diagram private network wireless communication terminal being carried out to Intermodulation Interference that a kind of embodiment that Fig. 6 provides for the embodiment of the present invention two provides.
Embodiment
For ease of the understanding to the embodiment of the present invention, be further explained explanation below in conjunction with accompanying drawing for several specific embodiment, and each embodiment does not form the restriction to the embodiment of the present invention.
Embodiment one
A kind of structure chart private network wireless communication terminal being carried out to the device of Intermodulation Interference test that this embodiment provides as shown in Figure 1, comprises following module:
Circulator group 11 and attenuator group 12, and the first coaxial switch 13 be connected with described circulator group 11, the second coaxial switch 14 be connected with described attenuator group 12.Described circulator 11 groups connects described attenuator group 12.Described circulator group 11 receives the measured signal of the private network wireless communication terminal of input, and described attenuator group 12 exports the measured signal after device process.
Above-mentioned circulator group 11 comprises the circulator of the multiple different models be connected in parallel, coaxial switch 13 is connected with each circulator in described circulator group 11, connection and the closedown of each circulator in described circulator group 11 is controlled by described first coaxial switch, in a test process, described first coaxial switch 13 is connected a circulator or is all disconnected by all circulators.
Above-mentioned attenuator group 12 comprises the attenuator of the multiple different models be connected in parallel, second coaxial switch 14 is connected with each attenuator in described attenuator group 12, connection and the closedown of each attenuator in described attenuator group 12 is controlled by described second coaxial switch 14, in a test process, described second coaxial switch 14 is connected an attenuator or is all disconnected by all attenuators.
The circulator of above-mentioned multiple different models can comprise: 137-167MHz circulator, 351-389MHz circulator, 403-423.5MHz circulator and 806-866MHz circulator.
Circulator is a multiport device, and in circulator, the transmission of signal can only be gone in ring along one direction, modern age radar and micro multi-channel communication system in all to go in ring by one direction the device of characteristic.In the Intermodulation Interference test process of private network wireless communication terminal, the signal of different frequency can be separated with circulator.
The connection diagram of above-mentioned four circulators and coaxial switch as shown in Figure 2.Above-mentioned 137-167MHz circulator can be looped through the measured signal of operating frequency between 137-167MHz.Above-mentioned 351-389MHz circulator can be looped through the measured signal of operating frequency between 351-389MHz.Above-mentioned 403-423.5MHz circulator can be looped through the measured signal of operating frequency between 403-423.5MHz.Above-mentioned 806-866MHz circulator can be looped through the measured signal of operating frequency between 806-866MHz.
The attenuator of above-mentioned multiple different models comprises: 10dB high power attenuator, 20dB high power attenuator.The effect of this high power attenuator is that the energy of the measured signal made after circulator process reduces, and to protect follow-up test instrumentation, meets test request.
The connection diagram of above-mentioned 2 attenuators and coaxial switch as shown in Figure 3.Above-mentioned 10dB high power attenuator is used for the power attenuation 10dB in measured signal, and above-mentioned 20dB high power attenuator is used for the power attenuation 20dB in measured signal.
When adopting above-mentioned 4 circulators, 2 attenuators, the embodiment of the present invention the concrete structure figure of the device of Intermodulation Interference test is carried out as shown in Figure 4 to private network wireless communication terminal, whole device adopts standard 4U cabinet, 4U cabinet refers to the height of cabinet: 1U=44.5mm, 4U=178mm, the front portion of casing is provided with antennal interface, is mainly used in connecting reception antenna.The measured signal of the private network wireless communication terminal received is input to and above-mentionedly carries out private network wireless communication terminal in the device of Intermodulation Interference test by reception antenna, the circulator group of above-mentioned measured signal successively in device and attenuator group, the circulator connected by coaxial switch and/or attenuator carry out corresponding annular by, attenuation processing to above-mentioned measured signal.The rear portion of casing is provided with output interface, by this output interface, test instrumentation is sent in the measured signal of said apparatus process, carry out the test of private network Type Approval Intermodulation Interference.
Modules performance parameter in said apparatus, useful life and mounting means can not only meet the related request of the intermodulation attenuation tests such as private network equipment; and necessary protection can also be carried out to test instrumentation, avoid because overheated radio-frequency power, direct current are instantaneous and static discharge and being damaged.
Embodiment two
Based on the device shown in above-mentioned Fig. 1, a kind of handling process of private network wireless communication terminal being carried out to the method for Intermodulation Interference test that this embodiment provides as shown in Figure 5, comprises following handling process:
Step 51, by multiple circulator composition circulator group, multiple attenuator composition attenuator group.
The circulator of multiple different model is connected in parallel, composition circulator group, first coaxial switch is connected with each circulator in described circulator group, connection and the closedown of each circulator is controlled by described first coaxial switch, in a test process, described first coaxial switch is only connected a circulator or is all disconnected by all circulators;
The attenuator of multiple different model is connected in parallel, composition attenuator group, second coaxial switch is connected with each attenuator in described attenuator group, connection and the closedown of each attenuator is controlled by described second coaxial switch, in a test process, described second coaxial switch is only connected an attenuator or is all disconnected by all attenuators.
Described circulator group connects described attenuator group.
The circulator of described multiple different model comprises: 137-167MHz circulator, 351-389MHz circulator, 403-423.5MHz circulator and 806-866MHz circulator;
The attenuator of described multiple different model comprises: 10dB high power attenuator, 20dB high power attenuator.
Step 52, the test specification requirement tested according to the Intermodulation Interference of private network wireless communication terminal, select connection circulator by coaxial switch from circulator group, and/or; From attenuator group, connection attenuator is selected by coaxial switch.
The selection of different circulators is selected according to the operating frequency of private network wireless communication terminal, and the operating frequency of private network wireless communication terminal should between the operating frequency of circulator.The different bandwidth circulator of the use in the embodiment of the present invention, contains all test items of private network Type Approval Intermodulation Interference test, and can switch the circulator link used in each index test process flexibly.
When private network wireless communication terminal is private network private network wireless communication terminal, the contrast signal table of the circulator of the equipment working frequency range of the Intermodulation Interference of described private network wireless communication terminal test, circulator group, selection as described in Table 1,
Table 1
The circulator work of operating frequency ability triggering selection within the operating frequency range of the circulator selected of described equipment.
Step 53, the circulator utilizing selection to connect and/or attenuator, process the measured signal of described private network wireless communication terminal.
Above-mentioned circulator group receives the measured signal of the private network wireless communication terminal of input, and described measured signal is successively through described circulator group, attenuator group, and attenuator group exports the measured signal after device process.
The circulator group of above-mentioned measured signal successively in device and attenuator group, the circulator connected by coaxial switch and/or attenuator carry out corresponding annular by, attenuation processing to above-mentioned measured signal.The rear portion of casing is provided with instrumentation tap, by this instrumentation tap, test instrumentation is sent in the measured signal of said apparatus process, carry out the test of Type Approval radiation dispersion different systems.
What this embodiment provided a kind ofly carries out the test philosophy schematic diagram of Intermodulation Interference as shown in Figure 6 to private network wireless communication terminal, connects a 20db fixed attenuator in the front and back of circulator respectively.
By the connecting test of connected mode shown in Fig. 6 system, the spectrum analyzer having valid value detecting way selected by measuring equipment, and circulator insertion loss is less than 1dB, and isolation is greater than 20dB, and test program is as follows:
A) operating frequency of private network wireless communication terminal is intermediate frequency, transmitter is with maximum power sequential filming unmodulated signal, spectrum analyzer attenuated inside device and frequency are swept wide, select suitable value, to guarantee that spectrum analyzer is operated in linear dynamic range and spectrum analyzer can Measurement accuracy intermodulation product to greatest extent;
B) interference signal source frequency is set to higher than private network wireless communication terminal centre frequency 100kHz, arranges interference signal source power output and signal type is identical with tested transmitter.
C) interference signal and equipment working signal enter spectrum analyzer through circulator, directly read the difference of third-order intermodulation product and main signal, i.e. the value of intermodulation decay;
Adjustment interference signal source frequency is lower than private network wireless communication terminal centre frequency 100kHz, repeats b) to test process c).
Above-mentioned private network wireless communication terminal can be: frequency modulation base station, frequency modulation hand-held station, frequency modulation Vehicle mounted station, frequency modulation coastal station, frequency modulation ship station, public's intercom, digital handset system base-station, digital handset system forwards platform, digital handset system handheld platform, digital handset system onboard platform, digital handset system coastal station, digital handset system ship station, shortwave unilateral-band broadcasting-station, data radio station, aeronautical radio station, amplitude modulation aeronautical station, non-stop layer system handheld platform, non-stop layer system onboard platform, non-stop layer system forwards platform, non-stop layer system monitoring console, digital non-center system handheld platform, digital non-center system onboard platform, digital non-center system forwards platform, digital non-center system monitoring console, GSM-R railway special mobile telephone set, GSM-R railroad special carries mobile phone, the special fixed telephone of GSM-R railway, GSM-R railway special-purpose terminal, simulation trunked base station, simulation cluster hand-held station, simulation cluster Vehicle mounted station, simulation company-data terminal, Digital Clustering iDEN base station, Digital Clustering iDEN hand-held station etc.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
Detailed process and the aforementioned means embodiment of by the method for the embodiment of the present invention, private network wireless communication terminal being carried out to the method for Intermodulation Interference test are similar, repeat no more herein.
Need manually to carry many test links, this test mode not only inefficiency, and manually carry test link completing in an Intermodulation Interference test process, can measure error be introduced, affect the accuracy of test result.
In sum, the device carrying out Intermodulation Interference test to private network wireless communication terminal that the embodiment of the present invention provides is the professional private network Type Approval Intermodulation Interference test synthesis solution of a compact conformation, is applicable to the Auto-Test System application of private network Type Approval Intermodulation Interference test design verification, automatically test aspect.Overcome and carry out in Intermodulation Interference test process at private network wireless communication terminal, need the problem of manually building different test link respectively for different test specification, achieve the system integration of all Intermodulation Interference test links of private network wireless communication terminal.
The embodiment of the present invention improves test accuracy and the testing efficiency of the Intermodulation Interference test of private network wireless communication terminal, and simultaneously protective meter is because overheated radio-frequency power, direct current are instantaneous and static discharge and being damaged.
The test of manual switchover circulator components has been risen to the stage of test of automatically switching by the embodiment of the present invention, improves testing efficiency, decreases artificial error, also for following Auto-Test System radiation disturbance and radiation dispersion development refer to lay a good foundation.For more complicated automatic test provides good reference later.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (4)
1. private network wireless communication terminal is carried out to a method for Intermodulation Interference test, it is characterized in that, comprising:
The circulator of multiple different model is connected in parallel, composition circulator group, first coaxial switch is connected with each circulator in described circulator group, connection and the closedown of each circulator is controlled by described first coaxial switch, the attenuator of multiple different model is connected in parallel, composition attenuator group, second coaxial switch is connected with each attenuator in described attenuator group, connection and the closedown of each attenuator is controlled by described second coaxial switch, in a test process, according to the test specification requirement that the Intermodulation Interference of private network wireless communication terminal is tested, from circulator group, select connection circulator by described first coaxial switch or all circulators are all disconnected, from described attenuator group, connect an attenuator by described second coaxial switch or all attenuators are all disconnected,
The circulator of described multiple different model comprises: 137-167MHz circulator, 351-389MHz circulator, 403-423.5MHz circulator and 806-866MHz circulator; Described 137-167MHz circulator is looped through the measured signal of operating frequency between 137-167MHz, described 351-389MHz circulator is looped through the measured signal of operating frequency between 351-389MHz, described 403-423.5MHz circulator is looped through the measured signal of operating frequency between 403-423.5MHz, and described 806-866MHz circulator is looped through the measured signal of operating frequency between 806-866MHz; The circulator work of operating frequency ability triggering selection within the operating frequency range of the circulator selected of described private network wireless communication terminal;
The attenuator of described multiple different model comprises: 10dB high power attenuator, 20dB high power attenuator;
Described circulator group receives the measured signal of the private network wireless communication terminal of input, described measured signal is successively through described circulator group, attenuator group, utilize the circulator of connection and/or attenuator to process described measured signal, described attenuator group exports measured signal after treatment.
2. method of private network wireless communication terminal being carried out to Intermodulation Interference test according to claim 1, is characterized in that, described method specifically comprises:
The contrast signal table of the circulator of the equipment working frequency range of described private network wireless communication terminal Intermodulation Interference test, circulator group, selection as described in Table 1,
Table 1
The circulator work of operating frequency ability triggering selection within the operating frequency range of the circulator selected of described equipment.
3. private network wireless communication terminal is carried out to a device for Intermodulation Interference test, it is characterized in that, comprising:
Circulator group, attenuator group, and the first coaxial switch to be connected with described circulator group, with the second coaxial switch that described attenuator group is connected, described circulator group connects described attenuator group, described circulator group comprises the circulator of the multiple different models be connected in parallel, described first coaxial switch is connected with each circulator in described circulator group, described first coaxial switch controls connection and the closedown of each circulator in described circulator group, described attenuator group comprises the attenuator of the multiple different models be connected in parallel, described second coaxial switch is connected with each attenuator in described attenuator group, described second coaxial switch controls connection and the closedown of each attenuator in described attenuator group,
The circulator of described multiple different model comprises: 137-167MHz circulator, 351-389MHz circulator, 403-423.5MHz circulator and 806-866MHz circulator; Described 137-167MHz circulator is looped through the measured signal of operating frequency between 137-167MHz, described 351-389MHz circulator is looped through the measured signal of operating frequency between 351-389MHz, described 403-423.5MHz circulator is looped through the measured signal of operating frequency between 403-423.5MHz, and described 806-866MHz circulator is looped through the measured signal of operating frequency between 806-866MHz; The circulator work of operating frequency ability triggering selection within the operating frequency range of the circulator selected of described private network wireless communication terminal;
The attenuator of described multiple different model comprises: 10dB high power attenuator, 20dB high power attenuator;
According to the test specification requirement that the Intermodulation Interference of private network wireless communication terminal is tested, in a test process, from described circulator group, select connection circulator by described first coaxial switch or all circulators are all disconnected, from described attenuator group, select connection attenuator by described second coaxial switch or all attenuators are all disconnected;
Described circulator group receives the measured signal of the private network wireless communication terminal of input, described measured signal is successively through described circulator group, attenuator group, the attenuator connected in the circulator connected in described circulator group and/or described attenuator group processes described measured signal, and described attenuator group exports the measured signal after described device process.
4. device private network wireless communication terminal being carried out to Intermodulation Interference test according to claim 3, it is characterized in that, described device is provided with antennal interface and output interface, described antennal interface connects reception antenna, receive the measured signal of the private network wireless communication terminal of input, described output interface exports the measured signal after described device process.
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| CN106961700B (en) * | 2017-02-10 | 2020-03-24 | 中国人民解放军空军工程大学 | Wireless communication method for dynamic remote fault-tolerant reconstruction of cluster avionics system computing resources |
| CN116668350B (en) * | 2023-07-28 | 2023-10-03 | 中国电子科技集团公司第三十研究所 | Communication terminal of digital private network and matched encryption component detection system and method |
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| CN101478353A (en) * | 2009-01-20 | 2009-07-08 | 信息产业部通信计量中心 | Radio frequency unit capable of being used in wireless communication base station radio frequency automatic test |
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Address after: 100041, No. 3, West well road, Badachu hi tech park, Beijing, Shijingshan District Co-patentee after: RADIOSKY (BEIJING) TECHNOLOGY Co.,Ltd. Patentee after: THE STATE RADIO MONITORING CENTER TESTING CENTER Address before: 100041, No. 3, West well road, Badachu hi tech park, Beijing, Shijingshan District Co-patentee before: RADIOSKY TESTING SERVICES (BEIJING) Ltd. Patentee before: THE STATE RADIO MONITORING CENTER TESTING CENTER |