Test method and system for over-the-air (OTA) performance of multi-aerial system

Abstract

The invention discloses a test method and a test system for the over-the-air (OTA) performance of a multi-aerial system and relates to the technical field of radio frequency test of a wireless communication product. The method comprises the following steps that: an OTA test environment is established for the multi-aerial system, wherein the established OTA test environment comprises a base station signal emulator, a multiple-input multiple-output (MIMO) channel emulator and a wave-absorbing darkroom, N test antennae are arranged in the wave-absorbing darkroom, and N is an integer of more than or equal to 2; the base station signal emulator is controlled to emulate and output transmitting signals of a plurality of base station antennae to the MIMO channel emulator, the MIMO channel emulator outputs G signals to the N test antennae, and the N test antennae sends a space signal to a device under test in the wave-absorbing darkroom; and the device under test receives the space signal and processes the space signal to realize an OTA test. By the test method and the test system provided by the technical scheme of the invention, the requirement of MIMO OTA is met effectively.

Description

technical field [0001] The present invention relates to the technical field of radio frequency testing of wireless communication products, in particular to a method and system for testing space radio frequency (Over TheAir, OTA) performance of a multi-antenna system (also called a multiple-input multiple-output system, MIMO system for short). Background technique [0002] With the development of modern industry, all kinds of wireless communication products can only guarantee the communication quality if they have good transmitting and receiving performance, that is, the total radiated power (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 OTA test index should be good. [0003] In order to ensure the normal use of mobile terminal equipment in the network, CTIA (Cellular Communications Standardization Association) has formulated a te...

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Problems solved by technology

[0004] For traditional single-antenna systems and terminals, TRP, TRS and other indicators are 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 those with MIMO multi-antenna technology. Communication equipment and communication terminals, however, traditional anechoic chambers cannot perform performance evaluation on the spatial performance of multi-antenna terminals

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