CN112666406B - Method for rapidly testing receiving sensitivity of receiving and transmitting same-frequency communication system antenna - Google Patents
Method for rapidly testing receiving sensitivity of receiving and transmitting same-frequency communication system antenna Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application discloses a rapid test method for receiving sensitivity of a receiving and transmitting same-frequency communication system antenna, which is used for measuring an equivalent omni-directional radiation power value EIRP at each angle of a mobile terminal, wherein the EIRP forms an equivalent omni-directional radiation power pattern. And selecting n+1 reference points according to the equivalent omnidirectional radiation power direction image, and respectively testing equivalent omnidirectional sensitivity values of the reference points on the reference angles, wherein the equivalent omnidirectional radiation power values correspond to the reference points. And defining the range of each reference interval according to the magnitude of the equivalent omni-directional radiation power value of the selected reference point. The EIS of the various points within each interval is calculated by the sum at the reference point of each interval. And integrating and summing the equivalent omnidirectional sensitivity of each reference angle and the second angle in each interval to obtain the receiving sensitivity of the terminal antenna. The test method is suitable for various different communication modes, and has the advantages of quick test and small error.
Description
Technical Field
The application relates to the field of communication, in particular to a rapid test method for receiving sensitivity of a receiving and transmitting common-frequency communication system antenna.
Background
In the prior art, the transmitting power is tested first to form a transmitting power pattern, and the transmitting and receiving of the antenna pattern is utilized to follow the reciprocity principle, so that the antenna radiation pattern is considered to be equal to the receiving sensitivity pattern (after normalization).
However, in actual engineering operation, the gain of the signal amplifier of the entire system may not be constant due to the variation of the input power. As shown in fig. 1 below, the equivalent omni-directional radiated power EIRP value for each angle of the terminal antenna under test is tested. The signals are amplified by the terminal amplifier, enter the AT 1-terminal receiving and transmitting antenna to radiate through the radio frequency switch, are received by the AT 2-test system receiving and transmitting antenna, enter the instrument and equipment of the test system through the radio frequency change-over switch and the PA3 test system power amplifier. And finally, the power level is detected by a test system.
During the passage through the amplifier of the test system, the input signals of different powers are amplified differently due to the amplifier. There is a non-linear relationship of input signal magnitude to output signal magnitude (the ideal condition requires a linear relationship).
During testing, as the terminal antenna has directivity, the size of the signal received by the system transceiver antenna is small along with the angle difference of the terminal antenna. Considering the problem of nonlinear characteristics of the amplification factor of the system amplifier along with the change of the size of an input signal, a pattern formed by the finally achieved EIRP value (after normalization) cannot faithfully express the pattern of the terminal antenna, and certain errors exist. As shown in fig. 2, a non-linear relationship between the magnitude of the input signal and the magnitude of the output signal of the power amplifier during operation of the amplifier causes a test error.
In the prior art scheme, the existing problem is ignored, and the EIRP value of each point is tested, and then the direction of the maximum value is selected for EIRS measurement. And calculating EIRS values of other points through the difference value of the EIRS and the EIRP. Without taking into account errors in other points due to the presence of non-linear relationships.
Disclosure of Invention
The application aims to provide a rapid test method for receiving sensitivity of a receiving and transmitting common-frequency communication system antenna in order to reduce test errors.
The technical scheme adopted by the application is as follows:
a rapid test method for receiving sensitivity of a receiving and transmitting common-frequency communication system antenna comprises the following steps:
step 1, measuring an equivalent omni-directional radiation power value EIRP at each angle of a mobile terminal, and forming an equivalent omni-directional radiation power pattern by the EIRP;
step 2, selecting n+1 reference points according to the equivalent omnidirectional radiation power direction image, and respectively testing equivalent omnidirectional radiation power values corresponding to the reference points of equivalent omnidirectional sensitivity values at the reference angles;
step 3, defining each reference interval range according to the equivalent omni-directional radiation power value of the selected reference point;
and 4, calculating the EIS of each point in each interval through the EIRP and the EIS at the reference point of each interval, wherein the calculation formula is as follows:
EIS n_x ＝EIS ref_n +(EIRP ref_n -EIRP ref_x )
wherein, EIS n_x Equivalent isotropic sensitivity for the x-th point in the n-th interval, EIS ref_n For equivalent omni-directional sensitivity at reference point n of the nth interval, EIRP ref_n For equivalent radiated power at reference point n of the nth interval, EIRP ref_x Equivalent radiated power at the x point;
and 5, integrating and summing the equivalent omnidirectional sensitivity of each reference angle and the second angle in each section to obtain the receiving sensitivity of the terminal antenna.
Further, as a preferred embodiment, the method for selecting the reference point in step 2 includes:
step 2-1, selecting the setting with the minimum TIRP value as a reference 0 angle ref_0;
step 2-2, selecting the maximum TIRP value to be set as a reference N angle ref_N;
step 2-3, equally dividing N in the maximum value and the minimum value of the TIRP as a reference point stepping value:
step value
Step 2-4, selecting other reference angles n by finding the TIRP closest to the TIRP ref_0 +n*TIRP Δ Is a value of (a) and (b).
Further, as a preferred embodiment, the number N of reference points is 4.
Further, as a preferred embodiment, the range of the 0 th interval in the step 3 is The N-th interval is +.>The value range of the other arbitrary interval n is +.>Wherein N is an integer greater than 0 and less than N.
By adopting the technical scheme, the equivalent omni-directional radiation power value EIRP at each angle of the mobile terminal is measured, and the EIRP forms an equivalent omni-directional radiation power pattern. And selecting n+1 reference points according to the equivalent omnidirectional radiation power direction image, and respectively testing equivalent omnidirectional sensitivity values of the reference points on the reference angles, wherein the equivalent omnidirectional radiation power values correspond to the reference points. And defining the range of each reference interval according to the magnitude of the equivalent omni-directional radiation power value of the selected reference point. The EIS of the various points within each interval is calculated by the sum at the reference point of each interval. And integrating and summing the equivalent omnidirectional sensitivity of each reference angle and the second angle in each section to obtain the receiving sensitivity of the terminal antenna. The test method is suitable for various different communication modes, and has the advantages of quick test and small error.
Drawings
The application is described in further detail below with reference to the drawings and detailed description;
FIG. 1 is a schematic diagram of a prior art test terminal;
FIG. 2 is a schematic diagram of a prior art amplifier with test errors caused by a nonlinear relationship between the magnitude of an input signal and the magnitude of an output signal of the power amplifier during operation;
fig. 3 is a flow chart of a method for rapidly testing the receiving sensitivity of the same frequency communication system antenna according to the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. For the communication system of the same frequency of the receiving and transmitting signals, the method for testing the receiving sensitivity comprises the following steps: it should be noted that the application is designed to be applicable to all communication systems which are consistent with the same frequency of transmission and reception, and is not limited to wifi.
As shown in fig. 3, the application discloses a rapid test method for receiving sensitivity of a receiving and transmitting co-frequency communication system antenna, which comprises the following steps:
step 1, measuring an equivalent omni-directional radiation power value EIRP at each angle of a mobile terminal, and forming an equivalent omni-directional radiation power pattern by the EIRP;
step 2, selecting n+1 reference points according to the equivalent omnidirectional radiation power direction image, and respectively testing equivalent omnidirectional radiation power values corresponding to the reference points of equivalent omnidirectional sensitivity values at the reference angles;
step 3, defining each reference interval range according to the equivalent omni-directional radiation power value of the selected reference point; \
And 4, calculating the EIS of each point in each interval through the EIRP and the EIS at the reference point of each interval, wherein the calculation formula is as follows:
EIS n_x ＝EIS ref_n +(EIRP ref_n -EIRP ref_x )
wherein, EIS n_x Equivalent isotropic sensitivity for the x-th point in the n-th interval, EIS ref_n For equivalent omni-directional sensitivity at reference point n of the nth interval, EIRP ref_n For equivalent radiated power at reference point n of the nth interval, EIRP ref_x Equivalent radiated power at the x point;
and 5, integrating and summing the equivalent omnidirectional sensitivity of each reference angle and the second angle in each section to obtain the receiving sensitivity of the terminal antenna.
Further, as a preferred embodiment, the method for selecting the reference point in step 2 includes:
step 2-1, selecting the setting with the minimum TIRP value as a reference 0 angle ref_0;
step 2-2, selecting the maximum TIRP value to be set as a reference N angle ref_N;
step 2-3, equally dividing N in the maximum value and the minimum value of the TIRP as a reference point stepping value:
step value
Step 2-4, selecting other reference angles n by finding the TIRP closest to the TIRP ref_0 +n*TIRP Δ Is a value of (a) and (b).
Further, as a preferred embodiment, the number N of reference points is 4.
Further, as a preferred embodiment, the range of the 0 th interval in the step 3 is The N-th interval is +.>The value range of the other arbitrary interval n is +.>Wherein N is an integer greater than 0 and less than N.
Parameter description: TIRP: total Isotropic Radiated Power total omnidirectional radiated power; TIRS: total Isotropic Radiated Sensitivity total omnidirectional radiation sensitivity; EIS: equivalent Isotropic Sensitivity equivalent omnidirectional sensitivity; EIRP: equivalent Isotropic Radiated Power equivalent omnidirectional radiated power;
EIRP ref_0 equivalent omnidirectional radiation power at reference point 0; EIRP (EIRP) ref_1 Equivalent omnidirectional radiation power at reference point 1; EIRP (EIRP) ref_n Equivalent omnidirectional radiation power at a reference point n;
EIS ref_0 equivalent omni-directional sensitivity at reference point 0; EIS (electronic identity System) ref_1 Equivalent omni-directional sensitivity at reference point 1; EIS (electronic identity System) ref_n Equivalent omni-directional sensitivity at reference point n.
In the prior art, after an EIRP result is tested, the maximum value is selected as a reference angle for reference calculation, so that the test error is larger in actual engineering application, and the test error introduced by the nonlinear characteristic of the amplifier of the test system cannot be avoided. The application increases adaptability optimization based on the prior art, can reduce error influence to a certain extent, and improves test precision.
In the practical engineering application, the test result of the prior art has a test error of 2.0dB, but the test result error optimized by the technology is reduced to 0.7dB.
By adopting the technical scheme, the equivalent omni-directional radiation power value EIRP at each angle of the mobile terminal is measured, and the EIRP forms an equivalent omni-directional radiation power pattern. And selecting n+1 reference points according to the equivalent omnidirectional radiation power direction image, and respectively testing equivalent omnidirectional sensitivity values of the reference points on the reference angles, wherein the equivalent omnidirectional radiation power values correspond to the reference points. And defining the range of each reference interval according to the magnitude of the equivalent omni-directional radiation power value of the selected reference point. The EIS of the various points within each interval is calculated by the sum at the reference point of each interval. And integrating and summing the equivalent omnidirectional sensitivity of each reference angle and the second angle in each interval to obtain the receiving sensitivity of the terminal antenna. The test method is suitable for various different communication modes, and has the advantages of quick test and small error.
It will be apparent that the described embodiments are some, but not all, embodiments of the application. Embodiments of the application and features of the embodiments may be combined with each other without conflict. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Claims (3)
1. A rapid test method for receiving sensitivity of a receiving and transmitting common-frequency communication system antenna is characterized by comprising the following steps: which comprises the following steps:
step 1, measuring an equivalent omni-directional radiation power value EIRP at each angle of a mobile terminal, and forming an equivalent omni-directional radiation power pattern;
step 2, selecting n+1 reference points according to the equivalent omni-directional radiation power direction image, and respectively testing equivalent omni-directional sensitivity values EIS of the reference points on the reference angles to obtain equivalent omni-directional radiation power values EIRP corresponding to the reference points; the reference point selection method comprises the following steps:
step 2-1, selecting the setting with the minimum TIRP value as a reference 0 angle ref_0;
step 2-2, selecting the maximum TIRP value to be set as a reference N angle ref_N;
step 2-3, equally dividing N in the maximum value and the minimum value of the TIRP as a reference point stepping value:
step value
Step 2-4, selecting other reference angles n by finding the TIRP closest to the TIRP ref_0 +n*TIRP Δ Angle of the value of (2);
step 3, defining each reference interval range according to the equivalent omni-directional radiation power value of the selected reference point;
step 4, calculating the EIS of each point in each interval through the EIRP and the EIS at the reference point of each interval, wherein the calculation formula is as follows:
EIS n_x ＝EIS ref_n +(EIRP ref_n -EIRP ref_x )
wherein, EIS n_x Equivalent isotropic sensitivity for the x-th point in the n-th interval, EIS ref_n For equivalent omni-directional sensitivity at reference point n of the nth interval, EIRP ref_n For equivalent radiated power at reference point n of the nth interval, EIRP ref_x The value of N is an integer which satisfies that N is more than or equal to 0 and less than or equal to N for the equivalent radiation power at the x point;
and 5, integrating and summing the equivalent omnidirectional sensitivity of each reference angle and the second angle in each section to obtain the receiving sensitivity of the terminal antenna.
2. The method for rapidly testing the receiving sensitivity of an antenna of the same frequency communication system according to claim 1, wherein: the number N of the reference points takes a value of 4.
3. The method for rapidly testing the receiving sensitivity of an antenna of the same frequency communication system according to claim 1, wherein: the range of the 0 th interval in the step 3 isThe N interval range isThe value range of the other arbitrary interval n is +.>
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| CN101459477A (en) * | 2008-12-28 | 2009-06-17 | 中国电子科技集团公司第四十一研究所 | Automatic test method for mobile phone antenna radiation performance |
| CN101510806A (en) * | 2009-03-06 | 2009-08-19 | 于伟 | Method and apparatus for testing total omnidirectional sensitivity of transmit-receive cofrequency mobile terminal |
| CN102237933A (en) * | 2010-04-26 | 2011-11-09 | 深圳市鼎立方无线技术有限公司 | Method and device for testing effective isotropic sensitivity (EIS) |
| CN103297161A (en) * | 2013-05-28 | 2013-09-11 | 惠州Tcl移动通信有限公司 | Method and system for testing terminal antenna receiving sensitivity |
| CN103298020A (en) * | 2013-05-28 | 2013-09-11 | 惠州Tcl移动通信有限公司 | WIFI OTA (wireless fidelity over the air) testing method and system of mobile terminal |
| CN104158612A (en) * | 2014-07-11 | 2014-11-19 | 财团法人交大思源基金会 | Acceleration method for total omnidirectional sensitivity measurement of mobile terminal |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459477A (en) * | 2008-12-28 | 2009-06-17 | 中国电子科技集团公司第四十一研究所 | Automatic test method for mobile phone antenna radiation performance |
| CN101510806A (en) * | 2009-03-06 | 2009-08-19 | 于伟 | Method and apparatus for testing total omnidirectional sensitivity of transmit-receive cofrequency mobile terminal |
| CN102237933A (en) * | 2010-04-26 | 2011-11-09 | 深圳市鼎立方无线技术有限公司 | Method and device for testing effective isotropic sensitivity (EIS) |
| CN103297161A (en) * | 2013-05-28 | 2013-09-11 | 惠州Tcl移动通信有限公司 | Method and system for testing terminal antenna receiving sensitivity |
| CN103298020A (en) * | 2013-05-28 | 2013-09-11 | 惠州Tcl移动通信有限公司 | WIFI OTA (wireless fidelity over the air) testing method and system of mobile terminal |
| CN104158612A (en) * | 2014-07-11 | 2014-11-19 | 财团法人交大思源基金会 | Acceleration method for total omnidirectional sensitivity measurement of mobile terminal |
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