Measuring Device Power Parameter Error Adjustment for Channel Loss Simulation
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Solution Overview
Problem
Current methods for performing measurements on mobile communications devices, such as Wi-Fi devices according to the 802.11ax standard, face challenges in simulating real-world channel loss conditions, either requiring complex hardware setups for over-the-air measurements or failing to accurately replicate real-world transmission conditions with wired connections.
Innovation Solution
A measuring device that adjusts transmission and reception power parameters by an error value to simulate real-world conditions without additional hardware, allowing for accurate device testing with a flexible user interface that automatically determines and limits these parameters within standard ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If over-the-air measurements are used in measuring chambers, then wireless transmission conditions can be tested, but the chamber size is limited and cannot simulate real-world channel loss conditions
Solution Approach 1:
The invention changes the power parameters by introducing an error value that is compensated through parameter adjustment. The transmitter sends a first message with a first transmission power parameter that is larger than the actual first transmission power by an error value, and includes an expected reception power parameter that is lower than the actual expected reception power by the same error value. This parameter transformation allows the device under test to calculate channel loss accurately despite the modified power values, resolving the contradiction between limited chamber size and accurate channel loss measurement.
2Device complexity
If wired connection measurements are used, then measurements can be performed without complex hardware, but channel loss is significantly lower than real-world conditions
Solution Approach 1:
The invention transforms the power parameters by adding an error value to the transmission power parameter and subtracting it from the expected reception power parameter. This allows wired connection measurements to simulate real-world channel loss conditions accurately without requiring complex hardware attenuation setups, as the parameter transformation mathematically compensates for the lower actual channel loss in wired environments.
3Reliability
If additional attenuators are employed to simulate real-world transmission conditions, then channel loss can be accurately simulated, but hardware effort significantly increases
Solution Approach 1:
The invention eliminates the need for physical attenuators by changing the power parameters in the measurement protocol. The transmitter sends modified power parameters (first transmission power parameter larger by error value, expected reception power parameter lower by error value) that allow the device under test to calculate accurate channel loss without requiring additional hardware components, thus resolving the contradiction between measurement accuracy and hardware complexity.
4Manufacturing precision
If manual parameter setting is required for measurements, then precise control can be achieved, but user expertise and operation complexity increase
Solution Approach 1:
The measuring device automatically determines the error value and calculates the appropriate first transmission power parameter and expected reception power parameter without requiring manual user input. The device performs self-service by autonomously generating the modified power parameters needed for accurate channel loss measurement, thereby maintaining precision while significantly reducing operation complexity and user expertise requirements.
Data Source
AI summary
A measuring device for performing measurements on a device under test is provided. It comprises a transmitter, which is adapted to transmit a first message to the device under test with a first transmission power. The first message comprises a first transmission power parameter and an expected reception power parameter. The measuring device moreover comprises a parameter generator, which is adapted to generate the first transmission power parameter larger than the first transmission power by an error value. The parameter generator is moreover adapted to generate the expected reception power parameter lower than an expected reception power of the measuring device, by the error value.