Method for calibration vector signal analyzer based on baseband waveform design

In this paper, we focus on the calibration on VSA, which consists three parts : 1. realization on the periodic 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 alleviate the negative effects of stochastic symbol sequences on metrology measurement, and unify the measurement model and mathematical model. Our experiments have shown that this metrology method and system can : 1. continuously adjust the values of digital modulated errors in a large range, and set the expected digital modulated error parameters; 2. exhibit strong consistency of the measured value and calculated value for such digital-modulated parameters as EVM; 3. show good repeatability on the values of digital modulated parameters, 4. be widely applied to almost all digital modulation schemes, such as 256QAM or higher rank modulation scheme.