The Modulation Domain Analyzer Key Technologies

Modulation domain is a plane domain composed of time and frequency of signal. It reflects the relationship between time and frequency, then time-frequency graph can be imported from Modulation domain. Modulation domain provides a new method for signal analysis. As a new and complex signal analysis technology, modulation domain analysis has already been applied to many fields such as electronic countermeasures and radar. Modulation Domain Analyzer (MDA), which is developed from this technology, can deeply analyze dynamic characters e.g. frequency, and provides us an intuitive method for complex signal testing and analysis. Therefore, MDA can be considered as an important device in electronics field.This program focuses on the key part of MDA -- Module of Instantaneous Testing Frequency, which includes four parts: Signal Interface, FPGA-Counter, Main Control Unit (MCU), Visual Terminal (Soft Panel). This paper mainly introduces the structure and related algorithm of Soft Panel, which includes three modules--Testing Module, Data Processing Module and Graph Display Module, also introduces their functions design and data analysis in detail.This paper introduces the main analysis methods in this system. In Testing Module, data input is categorized to file input and parallel ports input. In Data Processing Module, different solutions are presented separately according to three error types. A new method is presented to improve Wright——theorem in distinct error processing method. Mid-value filter is imported in random error processing. For system error processing, Two theorems are used as a subsidiary method. Considering the complexity of data processing as well as to cooperate with hardware debugging, error processing methods are all designed to be optional. The idea of matrix is imported in Graph Display Module, so multiple graph algorithms are implemented by matrix functions, thus the codes have been simplified and the system architecture is more standard, what's more, it is easier to provide interfaces for more complicated dynamic graph.The paper first introduces the concept and application of Modulation Domain Analysis. Secondly, the related measuring principle and key technique of the hardware of Instantaneous Testing Frequency component. Thirdly, it expatiates the system software development environment, the three key function modules and related algorithm. At last, several actual examples are presented.