CN105743553A - Uplink performance test system and method for multi-antenna mobile terminal - Google Patents

Abstract

The present invention provides a test system and method for uplink transmission performance of a multi-antenna mobile terminal, which mainly includes: a multi-antenna terminal to be tested, which is used to generate and send L-channel signals; a signal grouping unit, which is used to process L-channel signals, K multipath signals are formed, and the K multipath signals are divided into N groups of multipath signals and then output; the detection antenna distribution unit is used to divide the N groups of The multipath signals are assigned to corresponding detection antennas; the test unit is used to send N groups of multipath signals to the base station simulator through the detection antennas, and process and measure the received signals through the base station simulator to obtain the multi-antenna The uplink transmission performance of the terminal under test. The invention can test the uplink transmission performance of the multi-antenna terminal in the real environment.

Description

A system and method for testing uplink performance of a multi-antenna mobile terminal

technical field

The invention relates to the communication field, in particular to a system and method for testing uplink performance of a multi-antenna mobile terminal.

Background technique

MIMO technology has become one of the main key technologies of next-generation wireless communication, and wireless communication systems and wireless terminals using MIMO technology have gradually begun to be widely used in practice. The radiation performance of various wireless terminals on the market is the focus of our attention. Radiation performance evaluation includes uplink transmission performance and downlink reception performance of wireless terminals.

The radiation performance evaluation methods and standards for single-input-single-output (SISO, SimpleInputSimpleOutput) wireless terminals have been applied very maturely. The most commonly used measurement scheme is a single-antenna OTA (OvertheAir) test in a specific fully anechoic chamber. The test indicators mainly include the uplink total radiated power TRP and the downlink total receiving sensitivity TIS.

At present, the main indicator of MIMOOTA test is to obtain the change curve of terminal throughput by controlling the received power reaching the antenna port of the terminal under test. The throughput change curve measures the downlink receiving performance of the terminal. However, for wireless terminals with MIMO The evaluation scheme and standard of uplink transmission performance are still under discussion.

Based on this, it is urgent to provide a solution capable of testing the uplink transmission performance of a multi-antenna mobile terminal in a real environment.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a system for testing the uplink performance of a multi-antenna mobile terminal, which can test the uplink transmission performance of a multi-antenna mobile terminal in a real environment. In addition, a method for testing the uplink performance of the multi-antenna mobile terminal is also provided.

In order to solve the above technical problems, an embodiment of the present invention firstly provides a multi-antenna mobile terminal uplink performance testing system, including: a multi-antenna terminal to be tested, used to generate and send L signals, where L is the multi-antenna Antennas The number of antennas of the terminal to be tested; the signal grouping unit is used to process the L-path signals to form K multi-path signals, and divide the K multi-path signals into N groups of multi-path signals for output; detection The antenna distribution unit is used to distribute the N groups of multipath signals to the corresponding detection antennas according to the number and position information of the detection antennas in the fully anechoic chamber; the test unit is used to pass the N groups of multipath signals through the detection The antennas are sent to the base station simulator, and the received signal is processed and measured by the base station simulator to obtain the uplink transmission performance of the multi-antenna terminal under test.

Preferably, the signal grouping unit further includes: a signal grouping subunit, configured to perform multipath channel processing on the L signals to form K multipath signals; a channel configuration control unit, configured to The detection antenna and position information of the darkroom determine the multipath signal grouping rules; the signal connection subunit is used to divide the K multipath signals into N groups of multipath signals according to the multipath signal grouping rules and output them to all The detection antenna distribution unit described above.

Preferably, the detection antenna allocation unit further includes: a fully anechoic chamber configuration control unit, used to store the number and position information of the detection antennas in the fully anechoic chamber, and feed this information back to the channel configuration control unit The detection antenna allocation subunit is used to determine the distribution rules of the detection antennas; the detection antenna connection subunit is used to connect the input N groups of multipath signals to the detection antennas according to the distribution rules of the detection antennas.

Preferably, the multipath signal grouping rule is: normalize the angle of arrival of each multipath signal to an integer multiple of the unit angle value closest to the angle of arrival of the multipath signal; will have the same normalized angle of arrival value The multipath signals are divided into one group; wherein, the unit angle value refers to the angle between any two detection antennas in the fully anechoic chamber.

Preferably, the distribution rule of the detection antenna is: according to the angle information of each group of multipath signals, each group of multipath signals is connected to the detection antenna of the corresponding angle; wherein, the angle of the detection antenna refers to the angle of the detection antenna The included angle between the connection line with the base station simulator and the reference line in the plane formed by the detection antenna, the reference line is a diameter in the circle formed by the detection antenna, preferably a horizontal diameter.

The embodiment of the present invention also provides a method for testing the uplink performance of a multi-antenna mobile terminal, including the following steps: S1, processing L-path signals sent from the multi-antenna terminal to be tested to form K multipath signals, and converting the The K multipath signals are divided into N groups of multipath signals and then output, wherein, L is the number of antennas of the multi-antenna terminal to be tested; S2, according to the number and position information of the detection antennas in the full anechoic chamber, the The N groups of multipath signals are assigned to corresponding detection antennas; S3, the N groups of multipath signals are sent to the base station simulator through the detection antennas, and the received signals are processed and measured by the base station simulator to obtain The uplink transmission performance of the multi-antenna terminal under test.

Preferably, the step S1 further includes: S11, performing multipath channel processing on the L signals to form K multipath signals; S12, determining the multipath A signal grouping rule; S13. According to the multipath signal grouping rule, divide the received K multipath signals into N groups of multipath signals and output them.

Preferably, the step S2 further includes: S21, storing the number and location information of the detection antennas in the fully anechoic chamber; S22, determining the distribution rules of the detection antennas; S23, according to the distribution rules of the detection antennas, inputting The N groups of multipath signals are connected to the detection antenna.

Preferably, the multipath signal grouping rule is: normalize the angle of arrival of each multipath signal to an integer multiple of the unit angle value closest to the angle of arrival of the multipath signal; will have the same normalized angle of arrival value The multipath signals are divided into one group; wherein, the unit angle value refers to the angle between any two detection antennas in the fully anechoic chamber.

Preferably, the distribution rule of the detection antenna is: according to the angle information of each group of multipath signals, each group of multipath signals is connected to the detection antenna of the corresponding angle; wherein, the angle of the detection antenna refers to the angle of the detection antenna The included angle between the connection line with the base station simulator and the reference line in the plane formed by the detection antenna, the reference line is a diameter in the circle formed by the detection antenna, preferably a horizontal diameter.

The uplink performance test system for multi-antenna mobile terminals provided by the embodiment of the present invention is based on a fully anechoic chamber, and by grouping multipath signals, the output port of the signal grouping unit can be multiplexed, reducing the The cost of increasing the number of devices due to insufficient ports.

Moreover, the real wireless multipath propagation environment is reproduced by dynamically allocating the resource of the detection antenna to the grouped multipath signals.

In addition, the uplink transmission performance of the device under test in a multi-antenna scenario is obtained through the reception, processing and measurement of the signal sent by the multi-antenna mobile terminal by the base station simulator.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solutions of the present application or the prior art, and constitute a part of the specification. Wherein, the drawings expressing the embodiments of the present application are used together with the embodiments of the present application to explain the technical solutions of the present application, but do not constitute limitations on the technical solutions of the present application.

1 is a frame diagram of an uplink performance testing system for a multi-antenna mobile terminal according to an embodiment of the present invention;

FIG. 2 is an overall flowchart of a method for testing uplink performance of a multi-antenna mobile terminal according to an embodiment of the present invention;

FIG. 3 is an information diagram of the number and position numbers of detection antennas according to an embodiment of the present invention.

detailed description

The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve corresponding technical effects in the present invention. The embodiments of the present application and the various features in the embodiments can be combined with each other under the premise of no conflict, and the formed technical solutions are all within the protection scope of the present invention.

Fig. 1 is a frame diagram of an uplink performance testing system for a multi-antenna mobile terminal according to an embodiment of the present invention.

As shown in FIG. 1 , the uplink performance testing system mainly includes: a multi-antenna terminal under test 11 , a signal grouping unit 12 , a probing antenna distribution unit 13 and a testing unit 14 .

The multi-antenna terminal under test 11 is configured to generate L-channel signals and send the L-channel signals to the signal grouping unit 12 , where L is the number of antennas of the multi-antenna terminal under test 11 . Specifically, the multi-antenna terminal under test 11 transmits L-channel signals with rated power after receiving the instruction of the base station simulator, and outputs them to the multi-channel channel simulator (composed of the signal grouping unit 12 and the detection antenna distribution unit 13). The multi-channel channel simulator is used to simulate the real wireless space propagation environment.

The signal grouping unit 12 is used to process L signals to form K multipath signals, divide the K multipath signals into N groups of multipath signals, and output them to the detection antenna distribution unit 13 through the output port. The detection antenna distribution unit 13 is used to distribute the input N groups of multipath signals to corresponding detection antennas according to the number and position information of the detection antennas in the fully anechoic chamber. Among them, the full anechoic chamber refers to a special test environment for mobile phone performance testing.

The test unit 14 is composed of several detection antennas. After receiving the signals from the multi-channel channel simulator, N groups of multipath signals are sent to the base station simulator through the detection antennas, and the received signals are processed by the base station simulator. measurement to obtain the uplink transmission performance of the multi-antenna terminal under test.

Next, some components of the system will be described in detail with reference to FIG. 1 .

As shown in FIG. 1 , the signal grouping unit 12 further includes: a signal grouping subunit 121 , a signal connection subunit 122 and a channel configuration control unit 123 .

The signal grouping subunit 121 is configured to perform multipath channel processing on L signals, form K multipath signals, and send them to the signal connection subunit 122 . In the process of multi-path channel processing and forming L-path signals into K multi-path signals, it means that when the multi-path signals of multi-antenna terminals are sent to the base station, they propagate in space and are affected by ground objects, landforms and sea conditions. Affected by many factors, the receiver receives several paths such as refraction, reflection and direct radiation to reach the base station, thus forming a multipath signal. Here L signals are processed into K multipath signals, so as to simulate the spatial multipath effect of the signal from the terminal to the base station.

The channel configuration control unit 123 is used to determine the multipath signal grouping rule according to the configuration information of the fully anechoic chamber (ie, detection antenna and location information), and further control the signal connection subunit 122 . The signal connection subunit 122 is used to divide the received K multipath signals into N groups of multipath signals according to the multipath signal grouping rules, and output them to the detection antenna allocation unit 13 through the output port.

In this embodiment, on the basis of a fully anechoic chamber, the multipath signal is grouped, so that the output port of the signal grouping unit 12 can be multiplexed, and the angle information of the multipath signal is preserved while solving the problem of the signal grouping unit 12. The problem of the limited number of output ports reduces the cost of increasing the number of devices due to insufficient number of device ports.

It should be noted that the multipath signal grouping rule in this implementation is preferably: normalize the angle of arrival of each multipath signal to an integer multiple of the unit angle value closest to the angle of arrival of the multipath signal, and then have the same Multipath signals with normalized angle of arrival values are divided into one group, where the unit angle value refers to the angle between any two detection antennas in the fully anechoic chamber.

The detection antenna distribution unit 13 further includes: a fully anechoic chamber configuration control unit 131 , a detection antenna distribution subunit 132 and a detection antenna connection subunit 133 .

The fully anechoic chamber configuration control unit 131 is used to store the number and position information of the detection antennas in the fully anechoic chamber, and feed this information back to the channel configuration control unit 123 . The probing antenna allocation subunit 132 is configured to determine a probing antenna allocation rule. The detection antenna connection subunit 133 is used to connect the input N groups of multipath signals to the detection antennas through their angle of arrival values according to the distribution rules of the detection antennas, so as to complete the distribution of the N groups of multipath signals to the corresponding angle detection antennas.

Through the dynamic detection antenna resource allocation of grouped multipath signals, the real wireless multipath propagation environment between the multi-antenna test terminal and the base station simulator is realized, so that the uplink transmission performance in the multi-antenna scenario can be obtained .

It should be noted that the distribution rule of the detection antenna is preferably: according to the angle information of each output port multipath grouping of the signal grouping unit 12, each group of multipath signals is connected with the detection antenna of the corresponding angle. Wherein, the angle of the detection antenna refers to the angle between the connection line between the detection antenna and the base station simulator relative to the reference line within the plane formed by the detection antenna. The reference line is a diameter within the circle formed by the detection antenna, preferably a horizontal diameter.

FIG. 2 is an overall flowchart of a method for testing uplink performance of a multi-antenna mobile terminal according to an embodiment of the present invention. Referring to FIG. 2 , the workflow of the system for testing uplink performance of a multi-antenna mobile terminal according to this embodiment will be described below.

As shown in FIG. 2 , the signal grouping unit 12 processes L signals to form K multipath signals, and divides the K multipath signals into N groups of multipath signals for output (step S1 ).

Specifically, the signal grouping subunit 121 in the signal grouping unit 12 performs multipath channel processing on L signals according to the channel model to form K multipath signals. In this embodiment, each multipath signal is preferably obtained by synthesizing 10 subpath signals, so as to simulate the spatial multipath fading of the signal from the multi-antenna terminal under test to the antenna of the base station simulator.

The channel configuration control unit 123 determines the multipath signal grouping rule according to the detection antenna and location information of the fully anechoic chamber.

It should be noted that, in this embodiment, the general configuration of the full anechoic chamber is as follows: the number of detection antennas is generally 24, 32, and 64, and the average level is evenly distributed around the terminal to be tested. Angular simulation accuracy achievable in a darkroom. By sending signals with different powers at different time and space positions, it simulates multipath information such as delay, angle of arrival, and PAS in a multipath environment.

The determined multipath signal grouping rule is: normalize the arrival angle of each multipath signal to an integer multiple of the unit angle value closest to the multipath signal arrival angle, and then divide the Multipath signals are divided into groups. Wherein, the unit angle value refers to the angle between any two detection antennas in the fully anechoic chamber.

Take the configuration of 24 detection antennas as an example: the angle simulation step size S=(360°/24)=15°, the grouping method is determined according to the unit angle value S: the angle of arrival value of each multipath signal is specified as the closest to each Integer multiples of 15° (0°, ±15°, ±30°, ...±180°) of the actual value of the multipath signal arrival angle, and then group the multipath signals with the same arrival angle value into one group, each The arrival angles of all multipath signals in the group are integer multiples of 15°.

In addition, each antenna is numbered An according to the angle (AOA value) of the connection line between the detection antenna and the terminal under test relative to the reference line in the plane formed by the detection antenna, n∈[-11,+12], and the reference line is taken as For the connection between A0 and A12, see Figure 3.

Then, the signal connection subunit 122 divides the received K multipath signals into N groups of multipath signals according to the multipath signal grouping rules, and outputs them to the detection antenna distribution unit 13 through the output port of the signal grouping unit 12, and simultaneously records The angle of arrival value of the multipath signal on each output port.

Taking the channel model defined by SCM, ITU-RM.2135, and WINNERII as an example, the number of main paths included in it is generally 10-20, and the number of output ports of the channel grouping unit 12 is generally less than 10, so it is necessary to combine multipath signals with Grouping is performed according to certain rules, so that the output port of the signal grouping unit 12 can be multiplexed, ensuring that the multipath information can be transmitted to the detection antenna without increasing the number of signal grouping units. Wherein, N is equal to the number of output ports of the signal grouping unit 12 actually enabled.

Grouping K multipath signals solves the problem that the number of multipaths does not match the number of output ports of the signal grouping unit 12, not only retains the angle information of the multipath signals, but also solves the problem of the limited number of output ports of the channel emulation grouping unit 12 question.

Among them, the multipath signal grouping rule is: normalize the arrival angle of each multipath signal to an integer multiple of the unit angle value closest to the multipath signal arrival angle, and then divide the Multipath signals are divided into one group, where the unit angle value refers to the angle between any two detection antennas in the fully anechoic chamber. For example, if the number of detection antennas is 24, the corresponding unit angle value is 15°.

Next, the detection antenna distribution unit 13 distributes the input N groups of multipath signals to corresponding detection antennas according to the number and position information of the detection antennas in the fully anechoic chamber (step S2). Specifically, the fully anechoic chamber configuration control unit 131 stores the number and position information of the detection antennas in the fully anechoic chamber. The probing antenna allocation subunit 132 determines a probing antenna allocation rule. The detection antenna connection subunit 133 connects the input N groups of multipath signals to the detection antennas through their angle of arrival values according to the distribution rules of the detection antennas, and completes the distribution of the N groups of multipath signals to the corresponding angle detection antennas.

Wherein, the distribution rule of the detection antenna is: according to the angle information of each output port multipath grouping of the signal grouping unit 12, each group of multipath signals is connected with the detection antenna of the corresponding angle. Wherein, the angle of the detection antenna refers to the angle between the connection line between the detection antenna and the base station simulator relative to the reference line within the plane formed by the detection antenna. The reference line is a diameter within the circle formed by the detection antenna, preferably a horizontal diameter. It should be noted that the reference line here is preferably the horizontal diameter, which conforms to common practice and is easy to understand and calculate.

Finally, the test unit 14 sends N groups of multipath signals to the base station simulator through the detection antenna (the base station simulator is essentially a signal processor for simulating a base station in a real communication under a test environment.), and simulates The device processes and measures the received signal to obtain the uplink transmission performance of the multi-antenna terminal under test 11 (step S3). After the base station simulator receives the signals from the multi-antenna terminal, it measures and obtains parameters such as angle of arrival, time delay, and power of N sets of multipath signals. Then, the uplink transmission performance of the multi-antenna terminal is calculated according to the measurement results. In addition, it should be noted that the uplink transmission performance here generally refers to: Total Radiated Power (TRP), and the radio frequency radiation performance of the terminal is finally obtained by processing and calculating the time delay, angle of arrival, and power of the received multipath signal .

To sum up, the uplink performance test system of the multi-antenna mobile terminal provided by the embodiment of the present invention can multiplex the output ports of the signal grouping unit by grouping the multipath signals on the basis of the full anechoic chamber. , reducing the cost of increasing the number of devices due to insufficient number of device ports. Moreover, the real wireless multipath propagation environment is reproduced by dynamically allocating the resource of the detection antenna to the grouped multipath signals. In addition, the uplink transmission performance of the device under test in a multi-antenna scenario is obtained through the reception, processing and measurement of the signal sent by the multi-antenna mobile terminal by the base station simulator.

The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all Equivalent technical solutions also belong to the category of the present invention, and the scope of patent protection of the present invention should be defined by the claims.

Claims (10)

1. the ascending performance test system of a multiple antennas mobile terminal, it is characterised in that including:

Multiple antennas terminal to be measured, is used for producing and send L road signal, and wherein, L is the antenna number of described multiple antennas terminal to be measured；

Signal grouped element, for described L road signal is processed, forms K bar multipath signal, and exports after described K bar multipath signal is divided into N group multipath signal；

Exploring antenna allocation units, for according to the exploring antenna quantity in full noise elimination darkroom and positional information, distributing to corresponding exploring antenna by described N group multipath signal；

Test cell, for described N group multipath signal is sent to base station simulator by exploring antenna, and carries out to the received signal processing and measuring by described base station simulator, obtains the up emitting performance of described multiple antennas terminal to be measured.

2. the system as claimed in claim 1, it is characterised in that described signal grouped element farther includes:

Signal packet subelement, for described L road signal carries out multipath channel process, forms K bar multipath signal；

Passage configuration control unit, for the exploring antenna according to described full noise elimination darkroom and positional information, it is determined that multipath signal rule of classification；

Signal connexon unit, for according to described multipath signal rule of classification, exporting to described exploring antenna allocation units after described K bar multipath signal is divided into N group multipath signal.

3. system as claimed in claim 2, it is characterised in that described exploring antenna allocation units farther include:

Full noise elimination darkroom configuration control unit, for storing quantity and the positional information of the exploring antenna in described full noise elimination darkroom, and feeds back to described passage configuration control unit by this information；

Exploring antenna distribution subelement, for determining the allocation rule of exploring antenna；

Exploring antenna connexon unit, for the allocation rule according to described exploring antenna, is attached the described N group multipath signal of input and exploring antenna.

4. system as claimed in claim 2, it is characterised in that described multipath signal rule of classification is:

The angle that arrives of every multipath signal is normalized to the integral multiple arriving angular unit angle value closest to this multipath signal；

The multipath signal with identical normalization arrival angle value is divided into one group；

Wherein, described unit angle value refers to the angle in described full noise elimination darkroom between any two exploring antennas.

5. system as claimed in claim 3, it is characterised in that the allocation rule of described exploring antenna is:

According to the angle information often organizing multipath signal, the exploring antenna often organizing the corresponding angle of multipath signal is attached；

Wherein, the angle of described exploring antenna refer to the line of this exploring antenna and described base station simulator in the plane that exploring antenna is constituted relative to the angle of reference line, described reference line is a diameter in the circumference of exploring antenna composition, it is preferred to horizontal diameter.

6. the ascending performance method of testing of a multiple antennas mobile terminal, it is characterised in that comprise the following steps:

S1, the L road signal sent from multiple antennas terminal to be measured being processed, form K bar multipath signal, and export after described K bar multipath signal is divided into N group multipath signal, wherein, L is the antenna number of described multiple antennas terminal to be measured；

S2, according to the quantity of the exploring antenna in full noise elimination darkroom and positional information, described N group multipath signal is distributed to corresponding exploring antenna；

S3, N group multipath signal is sent to base station simulator by described exploring antenna, and carries out to the received signal processing and measuring by described base station simulator, obtain the up emitting performance of described multiple antennas terminal to be measured.

7. method as claimed in claim 6, it is characterised in that described step S1 farther includes:

S11, described L road signal is carried out multipath channel process, form K bar multipath signal；

S12, according to the exploring antenna in described full noise elimination darkroom and positional information, it is determined that multipath signal rule of classification；

S13, according to described multipath signal rule of classification, export after the described K bar multipath signal received is divided into N group multipath signal.

8. method as claimed in claim 7, it is characterised in that described step S2 farther includes:

S21, the quantity storing the exploring antenna in described full noise elimination darkroom and positional information；

S22, determine the allocation rule of exploring antenna；

S23, allocation rule according to described exploring antenna, be attached the described N group multipath signal of input and exploring antenna.

9. method as claimed in claim 7, it is characterised in that described multipath signal rule of classification is:

The angle that arrives of every multipath signal is normalized to the integral multiple arriving angular unit angle value closest to this multipath signal；

The multipath signal with identical normalization arrival angle value is divided into one group；

Wherein, described unit angle value refers to the angle in described full noise elimination darkroom between any two exploring antennas.

10. method as claimed in claim 9, it is characterised in that the allocation rule of described exploring antenna is:

According to the angle information often organizing multipath signal, the exploring antenna often organizing the corresponding angle of multipath signal is attached；

Wherein, the angle of described exploring antenna refer to the line of this exploring antenna and described base station simulator in the plane that exploring antenna is constituted relative to the angle of reference line, described reference line is a diameter in the circumference of exploring antenna composition, it is preferred to horizontal diameter.