Method and measurement system for determining the noise figure of a device under test

Abstract

A method for identifying the noise figure of a device under test (12) is described. A signal generator (14) that outputs the modulated signal, a device under test (12) and an analyzer (16) are provided. The signal generator (14) is connected with the analyzer (16) directly wherein at least two error vector magnitude measurements are performed. The signal generator (14) is connected with the deviceunder test (12) and the device under test (12) is connected with the analyzer (16) wherein at least two error vector magnitude measurements are performed. The noise contribution of the device under test (12) is determined from the error vector magnitude measurements performed. A gain measurement is performed on the device under test (12). The noise figure of the device under test is calculated based on the noise contribution of the device under test (12) obtained and the gain of the device under test (12) obtained. Further, a measurement system (10) is described.

Description

technical field [0001] Embodiments of the present disclosure generally relate to a method for identifying a noise figure of a device under test using a modulated signal. Furthermore, embodiments of the present disclosure generally relate to a measurement system for identifying a noise figure of a device under test using a modulated signal. Background technique [0002] Noise figure is a metric of interest for characterizing the behavior of a device under test (eg a communication device such as a user terminal device or any other signal processing device) in operation. [0003] In the prior art, the noise figure of a device under test is typically measured by using an external noise source that provides a pseudo-noise signal that simulates the noise in which the noise power is measured. In those methods, cold noise power, ie a noise signal at a very low power level, must be generated and measured. The noise source may be established by a programmable radio frequency source ...

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Problems solved by technology

[0004] However, the methods known in the prior art involve manual measurement methods, since noise sources are simulated, which are used to characterize the noise figure of the device under test different from the actual operating conditions

Therefore, the results of these measurements may have limited relevance or reliability

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