Open AccessA New Online Dynamic Testing Method for Nonlinear Distortion of Broadcast Transmitter
Author(s) -
Li Shanshan,
Zhou Jian,
Wang Xuan
Publication year - 2020
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2020.02.003
Subject(s) - transmitter , computer science , total harmonic distortion , distortion (music) , histogram , algorithm , nonlinear distortion , residual , signal (programming language) , nonlinear system , non linear least squares , estimation theory , telecommunications , power (physics) , bandwidth (computing) , artificial intelligence , amplifier , channel (broadcasting) , physics , quantum mechanics , image (mathematics) , programming language
The traditional method for measuring the parameters of the transmitter is that the tester measures the parameters according to the test standard and records the test results manually in the case of non‐work time. It has some shortcomings, such as low efficiency, inconvenient data storage and higher requirements for testers. In view of the shortcomings, an automatic online method of measuring harmonic distortion of transmitter is proposed. The method calculates parameter values by collecting transmitter data in real time. It is based on the histogram algorithm. According to the cumulative distribution function, discrete distribution of transmitter input and output signal amplitude values are obtained, and then the least squares algorithm is applied to the nonlinear polynomial fitting of discrete values. The feasibility of the method is verified by experimental simulation, and the residual value and test accuracy of different test methods are given.