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Multi-antenna measurement method and multi-antenna measurement system

A measurement method and measurement system technology, applied in diversity/multi-antenna systems, transmission systems, polarization/direction diversity, etc., can solve problems such as inability to achieve performance evaluation, and achieve the effect of simple evaluation and simple structure

Inactive Publication Date: 2010-06-09
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, a complex amplitude and phase control device 42 is required, and antenna performance evaluation can only be performed in a fading environment where the received signal strength fluctuates and in a moving state, and performance evaluation in a stationary state cannot be realized.

Method used

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  • Multi-antenna measurement method and multi-antenna measurement system
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  • Multi-antenna measurement method and multi-antenna measurement system

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no. 1 Embodiment approach

[0057] refer to figure 1 , the antenna measurement method of the first embodiment will be described. figure 1 It is a figure which shows the example of the antenna measurement system for carrying out the antenna measurement method of 1st Embodiment.

[0058] The device to be measured by the antenna measurement method of the present invention, that is, the device 1 to be measured is a mobile terminal such as a mobile phone having at least two antennas. figure 2 (a) shows an example of the external configuration of the device to be measured 1 . Such as figure 2 As shown in (a), the device under test 1 has two antennas 11a and 11b, and these constitute a multi-antenna.

[0059] also, figure 2 (b) shows an example of the internal configuration of the device to be measured 1 . Such as figure 2 As shown in (b), the device 1 to be measured has: the communication unit 14 for controlling the transmission and reception of the antennas 11a, 11b; the input unit 15 for inputtin...

no. 2 Embodiment approach

[0109] refer to Figure 17 , the antenna measurement method of the second embodiment will be described. Figure 17 It is a figure which shows the example of the antenna measurement system for carrying out the antenna measurement method of 2nd Embodiment. In this embodiment, the measurement is performed in an environment in which there are not only downlink radio waves transmitted from the transmitting antennas 31 and 32 to the device under test 1, but also signals from the device under test 1 to the simulated base station device. 4 transmitted uplink radio waves.

[0110] (Structure example 1)

[0111] here, as Figure 18 As shown, a received signal quality information generating unit 12 is provided in the device under test 1 to generate information indicating the received signal quality, that is, received signal quality information. The received signal quality information generated by the received signal quality information generation unit 12 is transmitted to the analog ...

no. 3 Embodiment approach

[0120] refer to Figure 21 The antenna measurement method of the third embodiment will be described. Figure 21 It is a figure which shows the example of the antenna measurement system for carrying out the antenna measurement method of 3rd Embodiment. In this embodiment, variable attenuators 71 and 72 and interference signal generators 81 and 82 are provided between transmitting antennas 31 and 32 and analog base station apparatus 4 in order to control the quality of the received signal of device under test 1 . The variable attenuators 71 and 72 have a function of changing the intensity of the signal output from the analog base station apparatus 4 . In addition, the interference signal generators 81, 82 have a function of changing the amount of interference included in the signals output from the transmitting antennas 31, 32. That is, in this embodiment, these variable attenuators 71, 72 and the interference signal generators 81, 82 can change the strength and interference a...

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Abstract

There is provided a multi-antenna measurement method of measuring a device under test 1 having at least two receive antennas and capable of considering the spatial correlation between antennas in a simpler configuration. Two different uncorrelated signal sequences (a, b) are generated by a pseudo base transceiver station. These signal sequences (a, b) are transmitted as radio waves from positions (positions of transmitting antenna elements 31 and 32) of the two base angles of the isosceles triangle toward the device under test 1 provided at a position of the apex angle respectively to measure the received antennas by receive antennas of the device under test 1. This method is easy to calibrate and can consider the spatial correlation between antennas in a simpler configuration.

Description

technical field [0001] The present invention relates to a multi-antenna measurement method and a multi-antenna measurement system for simply measuring multi-antenna performance. Background technique [0002] Generally, performance evaluation of communication antennas is performed by measuring radiation directivity in an anechoic chamber. refer to Figure 23 An example of measurement of radiation directivity of a communication antenna will be described. [0003] exist Figure 23 In , the measurement of radiation directivity was carried out as follows. That is, first, the antenna 100 to be measured is installed on the turntable 2 . Next, an electric signal supplied from the external signal source 40 is radiated from the opposite antenna 200 as an electric wave. Then, the antenna 100 to be measured is rotated on the rotating table 2 . At this time, the received power of the antenna 100 to be measured is measured at each angle. In the above manner, it is possible to measure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08
CPCH04B17/0057H04B7/10H04B17/0067H04B7/04H04B17/24H04B17/318
Inventor 冈野由树栗田大辅中松慎冈田隆
Owner NTT DOCOMO INC
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