Multi-antenna system based method and system for testing over the air (OTA) performance

Abstract

The invention discloses a multi-antenna system based method for testing over the air (OTA) performance. The method comprises the following steps that: a shunt device is used for mapping a path signal from a channel emulator to a test antenna in a fully anechoic chamber according to the predetermined mapping relation; and an OTA performance analysis and display module is used for analyzing and displaying the OTA performance of a device under test (DUT) according to a space signal received by the DUT from the test antenna, wherein the mapping relation between the path signal from the channel emulator and the test antenna is determined according to estimation of the direction and extended range of the angle of arrival of the path signal. The invention also correspondingly discloses a multi-antenna system based system for testing OTA performance. The method and the system have the following beneficial effects: the path signal output by the channel emulator is mapped to the test antenna according to certain rule and then the OTA performance is tested according to the space signal sent by the test antenna, thus realizing testing of the multi-antenna station OTA performance.

Description

technical field [0001] The invention relates to radio frequency testing technology, in particular to a method and system for testing space radio frequency performance based on a multi-antenna system. Background technique [0002] With the development of modern industry, all kinds of wireless communication products can only guarantee the quality of communication if they have good transmitting and receiving performance, that is, the Total Radiated Power (TRP) must be higher than a certain value, and the Total Radiated Sensitivity (Total Radiated Sensitivity, TRS) should be lower than a certain value, that is to say, the space radio frequency performance (Over The Air, OTA) test index should be good. [0003] In order to ensure the normal use of mobile terminal equipment in the network, the Cellular Communications Standardization Association (CTIA) has formulated a test standard for the spatial radio frequency performance of mobile terminals, namely "The test plan for mobile st...

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Problems solved by technology

[0004] For traditional single-antenna systems and terminals, TRP, TRS and other indicators are generally tested in traditional anechoic chambers. As LTE and other systems are about to be industrialized, traditional single-antenna systems and devices will gradually transition to multi-input and multi-output (MIMO) multi-antenna technology communication equipment and communication terminals, and the traditional anechoic room cannot perform performance evaluation on the space radio frequency performance of multi-antenna terminals, so it is necessary to add new equipment to form a new anechoic test solution on the basis of the traditional anechoic room To evaluate the spatial radio frequency performance of MIMO systems and terminal antennas, the current international standards have not yet specified the test methods and test procedures for radio frequency indicators under multi-antenna systems. Therefore, the present invention aims to provide a multi-antenna system Space radio frequency performance test method and system under

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