Radio Channel Data Collection for MIMO Emulation Accuracy
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Solution Overview
Problem
Current radio channel emulators in OTA testing do not accurately replicate real radio channels, leading to a need for improved methods to gather and emulate radio channel data for realistic testing of mobile terminals and network debugging.
Innovation Solution
A method and apparatus for gathering radio channel data from live radio systems using a multidimensional radio channel emulator, anechoic chamber, and directional antennas, which enables accurate correlation of angle of arrival and polarization properties, and maps this data onto OTA antennas for realistic emulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional radio channel emulation is used in OTA chamber, then testing can be performed, but the emulated radio channels do not correspond well enough to the real radio channels
Solution Approach 1:
The patent applies preliminary action by collecting and storing real radio channel data (including angle of arrival, polarization, and temporal characteristics) from live networks before performing OTA testing. This pre-collected data is then used to configure the radio channel emulator, ensuring that the emulation accurately reflects real-world conditions without losing critical channel characteristics.
Solution Approach 2:
The patent implements copying by creating a digital replica of real radio channel characteristics through data collection from live networks. The collected channel data (angle of arrival, polarization, delay profiles) is copied and used to configure the emulator, producing an accurate replica of real channel conditions in the OTA testing environment.
2Reliability
If more comprehensive radio channel data is collected to improve emulation accuracy, then realistic testing is achieved, but system complexity increases
Solution Approach 1:
The patent applies universality by using a single radio frequency scanner that performs multiple functions: collecting angle of arrival data, polarization information, delay profiles, and other channel characteristics all through one integrated device. This multi-functional approach reduces overall system complexity while comprehensively capturing real channel data.
Solution Approach 2:
The patent introduces an intermediary component - the radio frequency scanner - that mediates between the complex task of collecting comprehensive channel data and the simpler task of configuring the emulator. The scanner processes and consolidates multiple channel parameters, presenting them in a unified format that simplifies emulator configuration.
Data Source
AI summary
An 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.