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In this paper, we mainly focus on the metrological issues of such error parameters as EVM (Error Vector Magnitude), and address technical solutions on: 1. periodical continuity of digital modulated baseband waveforms with finite length; 2. fundamental digital modulation error settings based on error symbol design. This system can be applied to calibrate VSA (vector signal analyzer), and simulations...
In this paper, we focus on the calibration on VSA, which consists three parts : 1. realization on the peroidic continuity of baseband waves of finite-length digital modulated signals ; 2. fundamental error setting techniques based on error symbols design ; 3. technique of full error symbol frame, which assures that each symbol is present in the measurement on equal probability. This technique will...
Digital modulation error parameters, such as error vector magnitude EVM, is important in test and measurement of information system. This paper introduces the technology research progress in the metrology of digital modulation error parameters. First, we point out the basic problems existing in the field, which is about traceability and parameter range of calibration, and describe the relevant research,...
This paper develops a volume-based technique, called Volume Sphering Analysis (VSA) which can process all acquired Magnetic Resonance (MR) image slices formed image cube using only one set of training samples obtained from an image slice. So, several significant advantages and benefits can be gained from our proposed VSA. In the past, when MR image classification is performed, each image slice requires...
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