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Radio channel data and the use thereof

A radio channel and radio system technology, applied in the field of collecting radio channel data, can solve the problem that the simulated radio channel cannot correspond to the radio channel well enough

Active Publication Date: 2014-11-05
KEYSIGHT TECH SINGAPORE (SALES) PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the simulated radio channel in the OTA test room does not correspond well enough to the real radio channel

Method used

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  • Radio channel data and the use thereof
  • Radio channel data and the use thereof
  • Radio channel data and the use thereof

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Embodiment Construction

[0032] Exemplary embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings that illustrate some, but not all embodiments of the inventions. Indeed, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Although the specification may refer to "a", "an" or "certain" embodiments in several places, this does not necessarily mean that each such reference is to the same embodiment or that the feature is only applicable to a single implementation example. Single features of different embodiments may also be combined to provide other embodiments.

[0033] When a radio frequency signal is sent from a transmitter to a receiver, the signal travels in a radio channel along one or more paths with different angle of arrival, signal delay, polarization and power. Furthermore the frequency can change due to the Doppler effect. These changes cause ...

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Abstract

Apparatus comprises a receiver receiving wireless transmission of a real radio system from at least one base station of a radio system as a function of reception direction. The transmission comprises predetermined data. The apparatus comprises also a processing unit that forms taps of a delay profile on the basis of comparison between the data that is received and corresponding predetermined data. The processing unit estimates direction for the taps of the delay profile on the basis of a reception direction of the transmission, and forms radio channel data by associating the taps of the delay profile with the estimated direction. The radio channel data is for a radio channel model of a MIMO emulation in an OTA chamber having a plurality of antennas around a test zone where a device-under-test may be placed.

Description

technical field [0001] The present invention relates to the collection of radio channel data and its use. Background technique [0002] Communication between a DUT (device under test) and a base station of a radio system can be tested using an OTA (Over-The-Air) test, where a real DUT such as a mobile terminal is surrounded by multiple antennas coupled to to an emulator in a test room with the lowest possible echo. An emulator can be coupled to or used as a base station and simulates the propagation path between the mobile terminal and the base station according to the channel model, for example by generating independent Rayleigh fading signals. The OTA antenna sends preprocessed communication signals to the DUT based on weights determined by the simulated radio channel. [0003] It is of interest to measure mobile terminals in real networks, eg existing networks installed in specific environments. Endpoint vendors want to measure and "debug" their products in an OTA test...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00G01R29/08G01S3/02H01Q3/24H01Q21/06H01Q21/29
CPCH04B17/0047H04B17/009H04B17/0087H04B17/102H04B17/364H04B17/391
Inventor P·屈厄斯蒂
Owner KEYSIGHT TECH SINGAPORE (SALES) PTE LTD
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