Synchronization technology in power amplifier measurement

With the continuous development of communication technology, the nonlinear requirements of RF power amplifier are higher and higher. The nonlinear measurement of broadband power amplifier involves signal synchronization, nonlinear measurement and memory effect characterization. Aiming at the synchronization problem of test signals, a crosscorrelation interpolation synchronization algorithm suitable for unknown modulation signals is designed, and the corresponding amplifier test platform scheme is proposed. Compared with other papers, the algorithm in this paper has stronger applicability and anti noise performance. Comparing the test results of instrument manufacturers, the relative error of synchronization time is much less than 0.01%, the relative error of AM/AM is less than 0.1%, and the RMS phase error of AM/PM is less than 0.5°.