CN102014402A - Method and device for testing global radiation power in multi-antenna system - Google Patents

Abstract

The invention discloses method and device used for testing global radiation power in a multi-antenna system, which are used for solving the technical problem for measuring TRP (TV Remote Pickup) of a data stream in an MIMO (Multiple Input Multiple Output) system. The testing method comprises the following steps of: measuring the TRP when each data stream is individually started; measuring the TRP when all data streams are completely started; and calculating a global radiation power value of each data stream when all data streams are completely started according to the TRP when each data stream is individually started and the TRP when all data streams are completely started.

Description

The method of testing of total radiant power and device in a kind of multiaerial system

Technical field

The present invention relates to the radio frequency testing technical field of wireless communications products, relate in particular to multiaerial system (multiple-input and multiple-output, MIMO) spacial radio frequency performance (Over The Air, OTA) middle total radiant power (TotalRadiated Power, method of testing TRP) and device.

Background technology

Along with development of modern industry, all kinds of radio communication products only possess and good transmit and receive performance and could guarantee communication quality, promptly, total radiant power will be higher than certain value, global radiation sensitivity (Total RadiatedSensitivity, TRS) to be lower than certain value, that is to say that (Over The Air, OTA) test index wants good to spacial radio frequency performance.

CTIA (cellular based communication Association for Standardization) normally uses in network in order to ensure mobile terminal device, the testing standard of having formulated the portable terminal spacial radio frequency performance is " The test plan for mobile stationOTA performance ", at present, the portable terminal spacial radio frequency performance that a lot of operations commercial city requires to enter its network will be tested according to the CTIA standard-required, and TRP, TRS will satisfy certain limit value requirement.

In the CTIA standard, be on the sphere that is the center of circle, to carry out access point testing with the equipment under test for the measurement of TRP and TRS.In order accurately to estimate the performance that transmits and receives of equipment under test, need choose abundant test point.Fig. 1 is to be the spheric coordinate system schematic diagram of initial point foundation with tested radio communication product, tested wireless communications products is positioned on first rotating shaft or second rotating shaft of a testing apparatus, the first rotating shaft rotating range is the 0-180 degree, and the second rotating shaft rotating range is the 0-360 degree.Wherein the TRP test need be got a test point every 15 degree θ (0-180 degree) and Φ (0-360 degree), needs to test 264 points altogether.The TRS test needs to get a test point every 30 degree θ (0-180 degree) and Φ (0-360 degree), needs 60 points of test altogether.Because test point is that equal angles is chosen, so its right and wrong on sphere are equally distributed.TRP, TRS need carry out surface integral according to all test points and calculate.In integral operation, to being positioned at θ=0, two test points of θ=180, its sine value is zero, so these two points are not tested.

Total radiant power TRP index is to be used for testing Devices to test (Device Under Test, DUT) size of actual emanations power.TRP is defined as the integration of the radiant power of different directions on the whole radiation spheroid.So the computing formula of TRP is:

Wherein Ω is the pairing angular zone entity of direction, and f is a frequency, θ and Represent orthogonal polarization, EIRP _θWith

Be actual emission power rank, so TRP can be with following formula Equivalent Calculation corresponding to polarization:

N in the formula and M are measured angular θ _nThe angle and

The sampling point number at angle.

The method of testing and the test process of the radio-frequency (RF) index under the multiaerial system are not stipulated as yet in the present international standard.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method of testing and device that is used for the multiaerial system total radiant power, be used for solving the technical problem that mimo system is measured the TRP of data flow, for achieving the above object, technical scheme of the present invention is achieved in that

The method of testing of total radiant power in a kind of multiaerial system comprises:

Steps A 1, execution initialization;

Steps A 2, total radiant power (TRP) value when measuring each data flow and opening separately;

Steps A 3, the total radiant power value when measuring all data flow and all opening;

The total radiant power value of each data flow that the total radiant power value when steps A 4, the total radiant power when opening separately according to each data flow and all data flow are all opened calculates all data flow when all opening.

Further, comprise 2 data flow in the described method, steps A 2 is specially:

A21, turn-on data stream 1 are closed data flow 2, the total radiant power value TRP when the measurement user terminal sends data flow 1 separately ₁

A22, turn-on data stream 2 are closed data flow 1, the total radiant power TRP when the measurement user terminal sends data flow 2 separately ₂

Steps A 3 is specially: while turn-on data stream 1 and data flow 2, the total radiant power TRP when user terminal sends data flow 1 and data flow 2 simultaneously _T

The step of total radiant power when further, measuring each data flow and open separately and the total radiant power value when measuring all data flow and all opening is:

Step B1, send the uplink power control order to user terminal continuously;

Step B2, when user terminal reaches maximum power, begin to send the data under the PN15 pattern;

Step B3, on the sphere that with described user terminal is the center of circle, carry out access point testing, go out corresponding total radiant power value by following formula Equivalent Calculation:

Wherein f is a frequency, and θ represents perpendicular polarization,

Represent horizontal polarization, EIRP _θWith

Be actual emission power rank corresponding to polarization.

The mode of the total radiant power value of each data flow is when further, calculating all data flow and all open:

${\mathrm{TRP}}_{\mathrm{Ti}}={\mathrm{TRP}}_T*\frac{{\mathrm{TRP}}_i}{{\mathrm{TRP}}_1+...+{\mathrm{TRP}}_i+...+{\mathrm{TRP}}_N}$

TRP wherein ₁To TRP _NTotal radiant power value when opening separately for each data flow, TRP _TTotal total radiant power value under the situation of all opening for all data flow, TRP _TiTotal radiant power value for i data flow when all data flow are all opened.

Under the situation of having only two data transfer rates, the method for the total radiant power value of each data flow is when obtaining all data flow and all opening:

${\mathrm{TRP}}_{T1}={\mathrm{TRP}}_T*\frac{{\mathrm{TRP}}_1}{{\mathrm{TRP}}_1+{\mathrm{TRP}}_2}$

${\mathrm{TRP}}_{T2}={\mathrm{TRP}}_T*\frac{{\mathrm{TRP}}_2}{{\mathrm{TRP}}_1+{\mathrm{TRP}}_2}$

Wherein, TRP _T1The total radiant power value of the 1st data flow when all opening for all data flow; TRP _T2The total radiant power value of the 2nd data flow when all opening for all data flow.

Based on said method, the present invention also proposes the testing apparatus of total radiant power in a kind of multiaerial system, comprising:

Initialization module is used to carry out initialization operation;

Measurement module, the total radiant power (TRP) when being used to measure each data flow and opening separately are worth and the total radiant power value when measuring all data flow and all opening;

The total radiant power value of each data flow that computing module, the total radiant power value the when total radiant power when each data flow that is used for recording according to measurement module is opened separately and all data flow are all opened calculate all data flow when all opening.

Further, described measurement module is surveyed and is comprised pretreatment module, power computation module:

Pretreatment module is used for sending continuously the uplink power control order and makes user terminal reach maximum power, sends the data under the PN15 pattern then;

Power computation module is used for carrying out access point testing on the sphere that with tested user terminal is the center of circle, goes out corresponding total radiant power value by following formula Equivalent Calculation:

Wherein f is a frequency, θ and Represent orthogonal polarization, EIRP _θWith

Be actual emission power rank corresponding to polarization.

The mode of the total radiant power value of each data flow was when further, described computing module calculated all data flow and all opens:

${\mathrm{TRP}}_{\mathrm{Ti}}={\mathrm{TRP}}_T*\frac{{\mathrm{TRP}}_i}{{\mathrm{TRP}}_1+...+{\mathrm{TRP}}_i+...+{\mathrm{TRP}}_N}$

TRP wherein ₁To TRP _NTotal radiant power value when opening separately for each data flow, TRP _TTotal total radiant power value under the situation of all opening for all data flow, TRP _TiTotal radiant power value for i data flow when all data flow are all opened.

The present invention can send or receive a plurality of data flow simultaneously, realized in the mimo system test to the TRP of a plurality of data flow.

Description of drawings

Fig. 1 is the flow chart that carries out multiple data stream TRP test implementation method according to the present invention;

Fig. 2 is to be the spheric coordinate system schematic diagram of initial point foundation with tested radio communication product.

Embodiment

Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.

Embodiment 1:

Fig. 2 has provided the handling process of testing 2 data flow TRP simultaneously, and concrete steps are as follows:

Step 210: carry out the initialization before the test, comprise power control algorithm is set, enters closed loop test pattern etc.

1) down physical channel power and relevant parameter are set;

Physical channel	Power
		CPICH	CPICH?Ec/DPCH?Ec ＝7dB
P-CCPCH	P-CCPCH?Ec/DPCH?Ec ＝5dB
		SCH	SCH?Ec/DPCH?Ec ＝5dB
PICH	PICH?Ec/DPCH?Ec ＝2dB
		DPCH	Test?dependent?power

2) UE electric power starting.

3) set up process according to ordinary call and carry out call setup, power control algorithm is set to power control algorithm 2 (Power Control Algorithm 2), and compact model is set to OFF.

4) UE enters closed loop test pattern 2 (loopback test mode 2), the beginning closed loop test.

Step 220: carry out test process, the total radiant power value when the total radiant power value when measuring each data flow and opening separately and all data flow are all opened;

Substep 221: data flow 1 is opened, and data flow 2 is closed, the total radiant power value TRP of test data flow 1 in the case ₁

1) sends up (Up) power control command continuously and give UE, increase the power level of UE.

2) when UE reaches maximum power, begin to send the data under the PN15 data pattern.

3) UE is positioned over appropriate location with respect to the brain model.

4) measure EIRP respectively _θWith

, θ and φ direction are that step-length is got a little with 15 ° respectively, test at institute sampling point place.

5) record the EIRP that each is put _θWith

After the value, calculate TRP according to following formula ₁:

Substep 222: data flow 2 is opened, and data flow 1 is closed, the total radiant power value TRP of test data flow 2 in the case ₂

1) sends the Up power control command continuously to UE.

2) when UE reaches maximum power, begin to send the PN15 data pattern.

3) UE is positioned over appropriate location with respect to the brain model.

4) measure EIRP respectively _θWith

, θ and φ direction are that step-length is got a little with 15 ° respectively, test at institute sampling point place.

5) record the EIRP that each is put _θWith After the value, calculate TRP according to following formula ₂:

Substep 223: data flow 1 is opened, and data flow 2 is also opened simultaneously, test in the case data flow 1 and total total radiant power value TRP of data flow 2 _T

1) sends the Up power control command continuously to UE.

2) when UE reaches maximum power, begin to send the PN15 data pattern.

3) UE is positioned over appropriate location with respect to the brain model.

4) measure EIRP respectively _θWith

, θ and φ direction are that step-length is got a little with 15 ° respectively, test at institute sampling point place.

5) record the EIRP that each is put _θWith After the value, calculate TRP according to following formula _T:

Step 230: the test data that obtains is handled the total radiant power value of individual traffic when the total radiant power value when the total radiant power value when opening separately according to each data flow and all data flow are all opened is calculated all data flow and all opened.

TRP ₁For data flow 1 is opened the total radiant power value when data flow 2 is closed.

TRP ₂For data flow 2 is opened the total radiant power value when data flow 1 is closed.

TRP _TBe the total radiant power values of two data flow when all sending.

In addition

TRP then _T1Be that two data flow are all opened, the total radiant power value of the data flow 1 under the situation about all sending.

In addition

TRP then _T2Be that two data flow are all opened, the total radiant power value of the data flow 2 under the situation about all sending.

Embodiment 2:

When data flow is N data flow, be in step 220 and the step 230 it is that N data stream is handled with the difference of embodiment 1, present embodiment is when testing, at first measure the TRP value that obtains each individual traffic, and then under the situation that all data flow are all opened, obtain total TRP value; Suppose that the TRP value when each data flow is opened separately is respectively TRP ₁... TRP _N, total TRP value is TRP under the situation that all data flow are all opened _T, the total radiant power value TRP of i data flow when all data flow are all opened then _TiComputational methods as follows:

${\mathrm{TRP}}_{\mathrm{Ti}}={\mathrm{TRP}}_T*\frac{{\mathrm{TRP}}_i}{{\mathrm{TRP}}_1+...+{\mathrm{TRP}}_i+...+{\mathrm{TRP}}_N}$

Based on said method, the present invention also proposes the testing apparatus of total radiant power in the multiaerial system, comprising: initialization module, measurement module, computing module.

Initialization module is used to carry out initialization operation;

Total radiant power TRP value that measurement module is used to measure each data flow when opening separately and the total radiant power value when measuring all data flow and all opening; Measurement module further comprises pretreatment module and power computation module, and pretreatment module is used for sending continuously the uplink power control order makes user terminal reach maximum power, sends the data under the PN15 pattern then; Power computation module is used for carrying out access point testing on the sphere that with tested user terminal is the center of circle, goes out corresponding total radiant power value by following formula Equivalent Calculation:

Wherein f is a frequency, θ and

Represent orthogonal polarization, EIRP _θWith Be actual emission power rank corresponding to polarization.

The total radiant power value of each data flow when the total radiant power value the when total radiant power when each data flow that computing module is used for recording according to measurement module is opened separately and all data flow are all opened calculates all data flow and all opens by following method:

${\mathrm{TRP}}_{\mathrm{Ti}}={\mathrm{TRP}}_T*\frac{{\mathrm{TRP}}_i}{{\mathrm{TRP}}_1+...+{\mathrm{TRP}}_i+...+{\mathrm{TRP}}_N}$

TRP wherein ₁To TRP _NTotal radiant power value when opening separately for each data flow, TRP _TTotal total radiant power value under the situation of all opening for all data flow, TRP _TiTotal radiant power value for i data flow when all data flow are all opened.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. the method for testing of total radiant power in the multiaerial system is characterized in that, comprising:

A1, execution initialization;

A2, total radiant power (TRP) value when measuring each data flow and opening separately;

A3, the total radiant power value when measuring all data flow and all opening;

The total radiant power value of each data flow that the total radiant power value when A4, the total radiant power when opening separately according to each data flow and all data flow are all opened calculates all data flow when all opening.

2. method according to claim 1 is characterized in that, comprises 2 data flow in the described method, and steps A 2 is specially:

A21, turn-on data stream 1 are closed data flow 2, the total radiant power value TRP when the measurement user terminal sends data flow 1 separately ₁

A22, turn-on data stream 2 are closed data flow 1, the total radiant power TRP when the measurement user terminal sends data flow 2 separately ₂

Steps A 3 is specially: while turn-on data stream 1 and data flow 2, the total radiant power TRP when user terminal sends data flow 1 and data flow 2 simultaneously _T

3. method according to claim 1 and 2 is characterized in that, the step of total radiant power when measuring each data flow and opening separately and the total radiant power value when measuring all data flow and all opening is:

B1, send the uplink power control order to user terminal continuously;

B2, when user terminal reaches maximum power, begin to send the data under the PN15 pattern;

B3, on the sphere that with described user terminal is the center of circle, carry out access point testing, go out corresponding total radiant power value by following formula Equivalent Calculation:

Wherein f is a frequency, and θ represents perpendicular polarization,

Represent horizontal polarization, EIRP _θWith

Be actual emission power rank corresponding to polarization.

4. method according to claim 1 is characterized in that, the mode of the total radiant power value of each data flow is when calculating all data flow and all opening:

${\mathrm{TRP}}_{\mathrm{Ti}}={\mathrm{TRP}}_T*\frac{{\mathrm{TRP}}_i}{{\mathrm{TRP}}_1+...+{\mathrm{TRP}}_i+...+{\mathrm{TRP}}_N}$

TRP wherein ₁To TRP _NTotal radiant power value when opening separately for each data flow, TRP _TTotal total radiant power value under the situation of all opening for all data flow, TRP _TiTotal radiant power value for i data flow when all data flow are all opened.

5. method according to claim 2 is characterized in that, in the steps A 4, the method for the total radiant power value of each data flow is when obtaining all data flow and all opening:

${\mathrm{TRP}}_{T1}={\mathrm{TRP}}_T*\frac{{\mathrm{TRP}}_1}{{\mathrm{TRP}}_1+{\mathrm{TRP}}_2}$

${\mathrm{TRP}}_{T2}={\mathrm{TRP}}_T*\frac{{\mathrm{TRP}}_2}{{\mathrm{TRP}}_1+{\mathrm{TRP}}_2}$

Wherein, TRP _T1The total radiant power value of the 1st data flow when all opening for all data flow; TRP _T2The total radiant power value of the 2nd data flow when all opening for all data flow.

6. the testing apparatus of total radiant power in the multiaerial system is characterized in that, comprising:

Initialization module is used to carry out initialization operation;

Measurement module, the total radiant power (TRP) when being used to measure each data flow and opening separately are worth and the total radiant power value when measuring all data flow and all opening;

The total radiant power value of each data flow that computing module, the total radiant power value the when total radiant power when each data flow that is used for recording according to measurement module is opened separately and all data flow are all opened calculate all data flow when all opening.

7. device according to claim 6 is characterized in that, measurement module is surveyed and comprised:

Pretreatment module is used for sending continuously the uplink power control order and makes user terminal reach maximum power, sends the data under the PN15 pattern then;

Power computation module is used for carrying out access point testing on the sphere that with tested user terminal is the center of circle, goes out corresponding total radiant power value by following formula Equivalent Calculation:

Wherein f is a frequency, θ and

Represent orthogonal polarization, EIRP _θWith

Be actual emission power rank corresponding to polarization.

8. device according to claim 6 is characterized in that, computing module calculates all data flow when all opening, and the mode of the total radiant power value of each data flow is:

${\mathrm{TRP}}_{\mathrm{Ti}}={\mathrm{TRP}}_T*\frac{{\mathrm{TRP}}_i}{{\mathrm{TRP}}_1+...+{\mathrm{TRP}}_i+...+{\mathrm{TRP}}_N}$

TRP wherein ₁To TRP _NTotal radiant power value when opening separately for each data flow, TRP _TTotal total radiant power value under the situation of all opening for all data flow, TRP _TiTotal radiant power value for i data flow when all data flow are all opened.

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