WO2011134206A1

WO2011134206A1 - Method and device for testing effective isotropic sensitivity

Info

Publication number: WO2011134206A1
Application number: PCT/CN2010/075340
Authority: WO
Inventors: 李文; 李映红; 谢辉
Original assignee: 深圳市鼎立方无线技术有限公司
Priority date: 2010-04-26
Filing date: 2010-07-21
Publication date: 2011-11-03
Also published as: CN102237933A; CN102237933B

Abstract

A method for testing effective isotropic sensitivity (EIS) is provided in the present invention. The method includes the following steps: performing an Effective Isotropic Radiated Power (EIRP) measurement on a mobile terminal in multiple spatial positions to obtain multiple measured values of EIRP corresponding to the multiple spatial positions; taking any one spatial position of the multiple spatial positions as a datum spatial position to perform an EIS measurement on the mobile terminal, so as to obtain a measured value of EIS corresponding to the datum spatial position; according to the measured value of EIS, the measured value of EIRP, both in the datum spatial position, and the measured value of EIRP corresponding to a spatial position to be measured, obtaining a calculated value of EIS in the spatial position to be measured; and taking the calculated value of EIS as an estimated value to perform an EIS measurement on the spatial position to be measured, so as to obtain a measured value of EIS in the spatial position to be measured. Since it is comparatively accurate to adopt the calculated value of EIS, which is calculated, as the estimated value in the embodiments of the present invention, it is possible to reduce the search times of the test greatly, thereby increasing the speed of the test greatly.

Description

Equivalent omnidirectional sensitivity test method and device

Technical field

The present invention relates to the field of wireless transceiver performance testing technology for mobile terminals, and in particular, to a mobile terminal EIS (Effective Isotropic Sensitivity) testing method and apparatus. Background technique

The wireless receiving and transmitting performance of the mobile terminal is an important indicator of the network access test. According to the standards of the Cellular Telecommunications Network Association (GTIA), the transmitted signal strength and the receiving sensitivity at several spatial positions are measured on a spherical surface with the measured object as the center of the sphere, and then the test results are comprehensively calculated to give a single index. It is used to measure the wireless transceiver performance of mobile terminals.

For the test of emission performance, for example, the CTIA standard specifies 2 polarizations of EIRP (Effective Isotropic Radiated Power) measurement at intervals of 24°, a total of 24*11=264 spatial positions, each spatial position Spot 2 polarization directions; calculate all the test results to obtain TRP (Total Radiated Power). For the reception performance test, do 2 polarization EIS measurements at intervals of 30 °, a total of 60 spatial positions, 120 sensitivity tests; comprehensively calculate all test results to give a single indicator of TIS (Total Isotropic Sensitivity, total To sensitivity). According to the GTIA regulations, 3 channels are tested for each band, and for multi-band phones, all bands are tested. Of course, the smaller the interval between the spatial measurement positions (that is, the more measurement points), the more accurate and accurate the corresponding performance indicators of the device under test can be measured, but the TIS measurement is relatively slow, so the space interval of the TIS measurement is usually smaller than the space of the TRP. The measurement interval is large.

In particular, TIS testing of mobile terminal reception performance is more time consuming due to the need to test sensitivity at each spatial location, involving bit error rate testing, and bit error rate testing is more time consuming than power measurement, so TIS testing is often more time consuming. . However, due to the large number of TRP/TIS measurements required in the development and network testing of mobile terminals such as mobile phones, long-term TIS testing will seriously slow down the test progress of mobile terminals, making it a mobile terminal development process. The bottleneck in the process has extended the development cycle and the time of network testing. It can be seen from the above description that the TIS result is the weighted average of the EIS measurements in all directions, so the measurement speed of the EIS is determined. The measurement speed of the T IS is the key to increasing the measurement speed of the EIS. Summary of the invention

The object of the present invention is to solve at least one of the above problems in the prior art, and in particular to solve the drawback of slow EIS measurement speed.

To this end, an embodiment of the present invention provides a test method for quickly and accurately completing a mobile terminal EIS, including the following steps: performing equivalent omnidirectional radiated power EIRP measurement on a mobile terminal at multiple spatial locations to obtain the a plurality of EIRP measurement values corresponding to the plurality of spatial locations; performing EIS measurement on the mobile terminal with any one of the plurality of spatial locations as a reference spatial location to obtain an EIS measurement value corresponding to the reference spatial location Selecting any one of the plurality of spatial locations as the spatial location to be measured, and according to the EIS measurement value and the EIRP measurement value of the reference spatial location, and the EIRP measurement value corresponding to the spatial position to be measured, Obtaining an EIS calculation value of the spatial position to be measured, and performing an EIS measurement on the spatial position to be measured by using the EIS calculated value as an estimated value, and obtaining an EIS measurement value of the spatial position to be measured.

Another aspect of the present invention provides an EIS testing apparatus, including: an EIRP measurement module, configured to perform EIRP measurement on a mobile terminal at a plurality of spatial locations, to obtain a plurality of EIRP measurement values corresponding to the plurality of spatial locations; An EIS measurement module, configured to perform EIS measurement on the mobile terminal by using any one of the plurality of spatial locations as a reference spatial location, to obtain an EIS measurement value corresponding to the reference spatial location, and to calculate an EIS calculation module Obtaining an EIS calculation value as an estimated value, performing an EIS measurement on the measurement space position, and obtaining an EIS measurement value of the spatial position to be measured; and an EIS calculation module, configured to select any one of the plurality of spatial positions as a to-be-measured The spatial position, and the EIS calculation value of the spatial position to be measured is obtained according to the EIS measurement value and the EI RP measurement value of the reference space position, and the EIRP measurement value corresponding to the spatial position to be measured.

Since the EIS calculated value calculated by the embodiment of the present invention is relatively accurate as an estimated value, the number of test searches can be greatly reduced under the premise of ensuring the test accuracy, thereby greatly improving the test speed.

The additional aspects and advantages of the invention will be set forth in part in the description which follows. DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a flowchart of an EIS testing method according to an embodiment of the present invention;

Figure 2 shows the meaning of the coordinate parameters of the mobile terminal air interface (0TA) test;

Fig. 3 is a structural diagram of an EIS test apparatus according to an embodiment of the present invention. detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative only and not to be construed as limiting.

As shown in FIG. 1 , a flowchart of an EIS testing method according to an embodiment of the present invention includes the following steps: Step S101: Perform EIRP measurement on a mobile terminal in multiple spatial locations, for example, M spatial locations, where M is a positive integer, Obtain multiple EIRP measurements corresponding to M spatial locations. In the embodiment of the present invention, the M spatial locations meet the EIRP measurement requirements, and also meet the EIS measurement requirements. The met measurement requirements described herein refer to the minimum requirements for EIRP measurement and EIS side quantities, but are not excluded. Measurements with higher precision are used, for example, for EIS, it is also possible to measure at a spatial position of every 15°.

For example, the EIRP measurement of the mobile terminal can be performed at multiple spatial locations by using the existing GTIA standard emission performance test method, thereby obtaining respective equivalent omnidirectional radiation power measurement values corresponding to the spatial position. According to the GTIA standard, the mobile terminal shown in Figure 2 is located on the air interface (0TA) test sphere of the spherical center position, in the 0 and 0 polarization directions as shown in Figure 2, at a predetermined angular interval throughout the test sphere. The EIPR measurement of the above two polarization directions can be performed at the spatial position of the division. For example, GTLA specifies EIRP measurement at a spatial position of θ, Φ every 15°, but in practice, it is of course possible to divide the spatial position by a smaller interval angle to perform corresponding EI RP measurement. Here, the spatial position corresponding to the EI RP measurement is a spatial position divided by the predetermined interval on the entire test spherical surface of FIG. 2, and the total radiated power (TRP) characterizing the transmitting performance of the mobile terminal can be comprehensively calculated by the EIRP value corresponding to the spatial position measurement. ). Step S102: Perform EIS measurement on the mobile terminal by using any one of the M spatial locations as the reference spatial location to obtain an EIS measurement value corresponding to the reference spatial location.

The EIS measurement described here corresponds to a spatial position (reference space position), which can be determined by the existing CTIA, at a spatial position of θ, Φ every 30°, or by EIRP measurement according to step 101. ° The interval is divided into a corresponding spatial position, and it can also be a spatial position obtained by other intervals less than 30°. However, regardless of the number of intervals, the spherical surface of the mobile terminal transceiver performance test is divided, where a spatial position corresponding to the EIS measurement needs to coincide with one of the M spatial positions corresponding to the EIRP measurement in step 101, that is, the EIS The corresponding spatial position of the measurement is one of the M spatial positions corresponding to the above EIRP measurement. An explanation will be given later on this point later.

Step S103, selecting any spatial position from the M spatial positions as the spatial position to be measured, and obtaining the space to be measured according to the EIS measurement value and the EIRP measurement value of the reference space position, and the EIRP measurement value corresponding to the spatial position to be measured. The EIS calculation value of the position.

Through the above steps, the EIS measurement value of the reference space position and the corresponding EIRP measurement value, and the M EIRP measurement values corresponding to the M spatial positions can be obtained. The EIS measurement value of any one of the M spatial positions can be obtained by the EIS measurement value and the EIRP measurement value of the reference space position, and the EIRP measurement value of any spatial position to be measured.

The following is a detailed description with reference to FIG. 2, the mobile terminal is located in the center of the sphere of FIG. 2, a certain spatial position on the spherical surface is represented by (Θ, Φ), and Els e (Θ i, Φ") represents the spatial position (Θ i, The equivalent omnidirectional sensitivity of the 极化 polarization direction at Φ”), EIS(D( Θ i, Φ”) represents the equivalent omnidirectional sensitivity of the Φ polarization direction at the spatial position (Θ i, Φ”). In the narrative of the text, for the sake of simplicity, a spatial position is represented by a single subscript.

Let EIS of any two spatial positions be EIS", EIS _k , where j, k are used to indicate the numbers corresponding to different spatial positions, "J:

ElSj = R_sen - Gain",

Where R_ _{s <; n} is the radiation sensitivity, R_ _{S (; n} does not change with spatial position change, Gain is the gain of the antenna in the direction of the spatial position.

Therefore, EISrEIS _k = (R_sen - Gain)) - (R_ _Sen - Ga i n_ _k )

= Gain_ _k - Gain" (1) That is, the relationship between the equivalent omnidirectional sensitivity of any two spatial positions and the corresponding gain is as Expressed by equation (1).

Let the equivalent isotropic radiated power of any two spatial positions be EIRP", EIRPk, and j, k are used to indicate the numbers corresponding to different spatial positions, "J:

EI RPj = Power_ _c . _Nd + Delta +Gain",

Among them, Power_. . _Nd is the conducted transmission power of the mobile terminal antenna, Delta is the difference between the actual transmit power and the conducted transmit power of the power amplifier after the antenna load is added, and Gain_" is the gain of the antenna in the direction of the spatial position. Among them, Power_. . _n p Delta does not change with spatial position.

Therefore, EI RPj - EIRP _k = (Power _ _cond + Delta +Gain) - (Power _ _cond + Delta + Gain_ _k ) = Ga in" - Ga i n_ _k (2) that is, any two spatial positions, etc. The relationship between the effective omnidirectional radiated power and the corresponding gain is expressed by equation (2).

The derivation of the above formulas (1) and (2) takes into account the correct compensation of the path loss. Since the present invention is directed to the use of the same frequency channel system for reception and transmission, the following equations can be obtained by combining Equations 1 and 2:

EIS plant EIS _k = Gain_ _k - Ga i η" =_ ( EI RPj - EIRPJ (3) According to formula (3), the difference between EIS of any two spatial positions is equal to the difference of EIRP between the two positions. Inverted (transmitting and receiving the same frequency, the same path compensation).

The EIS calculation value of the spatial position to be measured is obtained by the formula (3) according to the EIS measurement value of the reference space position and the EIRP measurement value, and the EIRP measurement value corresponding to the spatial position to be measured, for example, according to the formula EIS" = EIS_ _b _ (EIRP"_EIRP_ _b ) Obtain an EIS calculation value of the spatial position to be measured, where j is the spatial position to be measured and b is the reference spatial position. It should be noted that the embodiment of the present invention is not only suitable for transmitting and receiving the same frequency mobile terminal, but also applicable to the case where the receiving frequency and the transmitting frequency are different, and the calculation value of the EIS for the mobile terminal transmitting and receiving the same frequency is more accurate, and For different frequency cases, there may be some error in the EIS calculation value as the measurement estimate, but using it as the initial value for further measurement of EIS can still greatly reduce the measurement time of EIS. In particular, if the receiving frequency and the transmitting frequency are not spaced apart, for example, the receiving and transmitting frequency intervals of the GSM are only 45 MHz, the calculated EIS value obtained by using the embodiment of the present invention is relatively accurate.

If the EIRP measurement values of all the position spaces measured by the GTIA-defined 15° interval are used, the EIS calculation values of the M corresponding position spaces can be obtained according to the formula (3), of course, in step 102. Except for the measured EIS measurements. As described in the prior art, the EIRP measurement in this case corresponds to 264 spatial positions. If a part of the EI RP measurement of all position spaces measured by the GTIA specified 15° interval is used, the partial EI RP measurement may correspond to the GT IA standard 30 ° interval EIS measurement corresponding to the spatial position of the entire test sphere - That is, the measurement values corresponding to the 60 spatial positions are selected from the EIRP measurement values corresponding to the 264 spatial positions. Of course, the spatial position corresponding to the selected EI RP measurement value is based on the EIS measurement spatial position in step 104, on the entire test spherical surface. The mutual spatial position is spaced at 30°. Alternatively, according to the angle of the spatial position where the EIRP measurement is divided, the selected EIRP measurement value corresponds to the spatial position corresponding to other EIS measurements that meet the GTIA standard requirements.

Step S104: Perform EIS measurement on the measured spatial position by using the EIS calculated value as an estimated value, and obtain an E I S measurement value of the spatial position to be measured.

Specifically, the EIS calculated value of the spatial position to be measured is used as an estimated value, and the error rate is measured by using the estimated value as an initial value, and it is determined whether the measured error rate satisfies the target bit error rate requirement, if the target error code is not met. The rate requirement further adjusts the initial value according to the measurement result until the measured bit error rate satisfies the target bit error rate requirement, and obtains the EIS measurement value of the spatial position to be measured.

In the prior art EIS test, if the EIS of the location to be tested is to be tested, it is searched within the possible range of EIS. For example, the possible range of EIS_i is -85dBm~-109dBm, then the test will start from -85dBm. If the signal size is -85dBm, the bit error rate BER is less than the target bit error rate, then reduce the signal size to -86dBm, repeat the test bit error rate again; and so on. When the bit error rate is close to the target bit error rate, for example, the target bit error rate of GSM is 2.44%, and when the bit error rate reaches 0.5%, the interval of signal size change is gradually reduced. For example, when the signal size changes to -105dBm, the error rate obtained by the test is 0.5%, then the next signal size is adjusted to -105.5dBm, and the bit error rate is tested again, and so on, until the target bit error rate is met.

As can be seen from the above description, on the one hand, if the bit error rate test is to be performed many times first, and the test result is gradually approached, the test time required is long; on the other hand, if the bit error rate is high, the test accuracy is required. When testing the bit error rate, the test data bits to be sent are increased, and the cost is also more test time. If the sensitivity of the test is improved, for example, the most detailed search step is changed to 0.1 dBm, then it is necessary to perform More searches, at the cost of more testing time. In short, the traditional method of testing EIS is slow and slow, and it takes more time and slower to improve the test accuracy. However, in the embodiment of the present invention, when the frequency at which the mobile terminal receives and transmits signals is the same, that is, when the frequencies of the uplink and downlink channels of the mobile terminal (mobile phone) are the same, if the EI RP_ _{b of the} reference position (reference space position) is known And EI S_ _b , and EI RP_; of the spatial position to be measured, then the EIS of the spatial position to be measured can be quickly measured.

First, according to the formula EIS" = EIS_ _b _ ( EIRP "_EIRP_ _b ), the EIS calculated value EISj of the spatial position to be measured is calculated, and the calculated value EISj is taken as an estimated value. The initial value of the signal is set to the estimated value, and the error rate BER is tested. If the measured bit error rate is smaller than the target bit error rate, the signal size is reduced; if compared with the target bit error rate, the measured value is measured. If the bit error rate is too large, the signal size is increased. In the embodiment of the present invention, since the estimation value is selected very accurately, the initial value can be adjusted with a very precise step size, for example, 0.01 - 0.2 dBm, preferably 0.1 dBm, so that high test accuracy can be obtained. Since the estimated value is very accurate, the number of times of the test search is small, or is one time. Therefore, the embodiment of the present invention greatly improves the test speed under the premise of ensuring the test accuracy, and the test accuracy is high.

It should be noted that the predetermined interval angle corresponding to the EIS measurement and the EIRP measurement is not limited to the above specific embodiment. In the actual operation, if the GTIA standard is met, the EIS measurement corresponding to the position space and the EIRP according to the predetermined interval angle. The measurement position space may be partially and completely coincident with the TIS test requirements.

As shown in FIG. 3, it is a structural diagram of an EIS testing device according to an embodiment of the present invention. The EIS testing device 100 includes an E I RP measuring module 110, an E I S measuring module 120, and an E I S calculating module 130. The E I RP measurement module 110 is configured to perform EIRP measurement on the mobile terminal at a plurality of spatial locations to obtain a plurality of EIRP measurements corresponding to the plurality of spatial locations. The EIS measurement module 120 is configured to perform EIS measurement on the mobile terminal with any one of the plurality of spatial locations as the reference spatial location, to obtain an EIS measurement corresponding to the reference spatial location, and an EIS obtained by the EIS calculation module 130. The calculated value is used as the estimated value to perform EIS measurement on the measured spatial position, and the EIS measurement value of the spatial position to be measured is obtained. The EIS calculation module 130 is configured to select any one of the plurality of spatial locations as the spatial location to be measured, and according to the EIS measurement value and the EIRP measurement value of the reference spatial location, and the EI RP measurement value corresponding to the spatial position to be measured, Obtain the EIS calculation value of the spatial position to be measured.

In one embodiment of the present invention, the calculation module 130 obtains EIS EIS calcd spatial position to be measured according to the formula EIS "= EIS_ _b _ (EIRP" _EIRP_ _b), where, j is to be measured The spatial position, b is the reference space position.

In an embodiment of the present invention, the EIS measurement module 120 uses the EIS calculated value of the spatial position to be measured as an estimated value, uses the estimated value as an initial value to perform a bit error rate measurement, and determines whether the measured bit error rate satisfies the target error. The rate requirement, if the target bit error rate requirement is not met, further adjusts the initial value according to the measurement result until the measured bit error rate satisfies the target bit error rate requirement, and obtains the EIS measurement value of the spatial position to be measured. For example, the same frequency channel system of the present invention can be adjusted in steps of 0.01 - 0.2 dBm, including but not limited to the third generation mobile communication system TD-SCDMA, which adopts time division duplex mode (TDD), and the receiving and transmitting work is The same frequency channel, and different working time slots are used to separate and receive the transmission channel. The invention is also applicable to other systems that receive and transmit channels using the same frequency (such as wireless local area network WiFi). The present invention is also suitable for transmitting and receiving channel systems of different frequencies, such as GDMA mobile phones. The EIS calculation value obtained by using the embodiment of the present invention as an initial value can still greatly reduce the test time and improve the test speed. Those skilled in the art can also extend the above embodiments of the present invention to the testing of other similar mobile terminals according to the idea of the present invention, and these should be included in the protection scope of the present invention.

While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope of the invention is defined by the appended claims and their equivalents.

Claims

Claim

An equivalent omnidirectional sensitivity EIS test method, comprising the steps of: performing equivalent omnidirectional radiated power EIRP measurement on a mobile terminal at a plurality of spatial locations to obtain a plurality of spatial positions corresponding to the plurality of spatial locations; EIRP measurements;

Performing an EIS measurement on the mobile terminal by using any one of the plurality of spatial locations as a reference spatial location to obtain an EIS measurement value corresponding to the reference spatial location;

Selecting any one of the plurality of spatial locations as the spatial location to be measured, and obtaining an EIS measurement value and an EIRP measurement value of the reference spatial location, and an EIRP measurement value corresponding to the spatial position to be measured. An EIS calculation value of the spatial position to be measured; and an EIS measurement of the spatial position to be measured by using the calculated value of the EIS as an estimated value, to obtain an EIS measurement value of the spatial position to be measured.

The EIS test method according to claim 1, wherein the EIS measurement value and the EIRP measurement value of the reference spatial position and the EIRP measurement value corresponding to the spatial position to be measured are obtained, and the to-be-measured is obtained. The EIS calculation values for the spatial position include:

Obtaining an EIS calculation value of the spatial position to be measured according to the formula EIS = EIS_ _b _ ( EIRP _EIRP_ _b ), where j is the spatial position to be measured and b is the reference spatial position.

3. The EIS test method according to claim 2, wherein the formula is obtained by the following steps:

Obtaining a relationship between equivalent omnidirectional sensitivity and corresponding gain of any two of the plurality of spatial positions according to a relationship between the equivalent omnidirectional sensitivity and the radiation sensitivity and the gain of the mobile terminal antenna in the corresponding spatial position direction;

Obtaining equivalent isotropic radiated power of any two of the plurality of spatial locations according to a relationship between the equivalent omnidirectional radiated power and the conducted transmit power of the mobile terminal antenna, the actual transmit power, and the gain in the corresponding spatial position direction Relationship with the corresponding gain;

Obtaining any two spatial positions according to the relationship between the equivalent omnidirectional sensitivity and the corresponding gain of any two spatial positions and the relationship between the equivalent isotropic radiated power of the arbitrary two spatial positions and the corresponding gain The relationship between the equivalent omnidirectional sensitivity and the equivalent isotropic radiated power corresponding to any two spatial locations.

The EIS test method according to any one of claims 1 to 3, wherein the EIS measurement is performed on the spatial position to be measured by using the EIS calculated value as an estimated value, and the EIS measurement of the spatial position to be measured is obtained. Values include:

Taking the EIS calculated value of the spatial position to be measured as an estimated value, and using the estimated value as an initial value to perform a bit error rate measurement;

Determining whether the measured bit error rate satisfies the target bit error rate requirement, and if the target bit error rate requirement is not met, further adjusting the initial value according to the measurement result until the measured bit error rate satisfies the target bit error rate requirement, and obtaining the EIS measurement of the spatial position to be measured.

The EIS test method according to claim 4, wherein the initial value is adjusted in steps of 0.01 - 0.2 dBm.

6. The EIS test method according to claim 1, wherein the reference spatial position and the spatial position to be measured satisfy both an EIRP measurement requirement and an E IS measurement requirement.

7. An EIS testing device, comprising:

An EIRP measurement module, configured to perform EIRP measurement on the mobile terminal at multiple spatial locations, to obtain multiple EIRP measurement values corresponding to the multiple spatial locations;

An EIS measurement module, configured to perform EIS measurement on the mobile terminal by using any one of the plurality of spatial locations as a reference spatial location, to obtain an EIS measurement value corresponding to the reference spatial location, and to calculate an EIS calculation module Obtaining an EIS calculation value as an estimated value, performing an EIS measurement on the measured spatial position, and obtaining an EIS measurement value of the spatial position to be measured;

An EIS calculation module, configured to select any one of the plurality of spatial locations as the spatial location to be measured, and according to the EIS measurement value and the EIRP measurement value of the reference spatial location, and the spatial position to be measured The EI RP measurement value obtains the EIS calculation value of the spatial position to be measured.

The EIS testing apparatus according to claim 7, wherein the EIS calculation module obtains the spatial position to be measured according to a formula EIS = EIS_ _b _ (EIRP _EIRP_ _b )

EIS calculates the value, where j is the spatial position to be measured and b is the reference spatial position.

9. The EIS test apparatus according to claim 8, wherein the formula is obtained by the following steps:

Obtaining the equivalent of any two spatial positions in the plurality of spatial positions according to the relationship between the equivalent omnidirectional sensitivity and the radiation sensitivity and the gain of the mobile terminal antenna in the corresponding spatial position direction The relationship between sensitivity and corresponding gain;

The EIS testing device according to any one of claims 7-9, wherein the EIS measuring module uses the EIS calculated value of the spatial position to be measured as an estimated value, and uses the estimated value as an initial value to make an error. Rate measurement, and determine whether the measured bit error rate meets the target bit error rate requirement. If the target bit error rate requirement is not met, the initial value is further adjusted according to the measurement result until the measured bit error rate satisfies the target bit error rate requirement. And obtaining an EIS measurement of the spatial position to be measured.

The EIS test apparatus according to claim 10, wherein said initial value is adjusted in steps of 0.01 - 0.2 dBm.

12. The EIS testing apparatus according to claim 7, wherein the reference space position and the spatial position to be measured satisfy both an EIRP measurement requirement and an EIS measurement requirement.