基于广义S变换的电磁环境复杂度评估理论与方法研究

项目名称： 基于广义S变换的电磁环境复杂度评估理论与方法研究

项目编号： No.61501162

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 尹柏强

作者单位： 合肥工业大学

项目金额： 19万元

中文摘要： 电磁环境复杂度评估是应对电磁干扰的重要手段，而评估参数的科学选择和提取是正确评估的关键。现有电磁环境复杂度评估参数提取主要以傅里叶变换为基础，实现了评估参数的分立提取，但缺乏对评估参数的整体性和关联性研究。本项目拟以广义S变换联合时频参数提取为切入点，研究时域占用度、频率占用度和能量占用度等复杂电磁环境评估关键参数同步提取方法，探索各评估参数之间的内在关联特性；阐明整体评估参数与电磁环境复杂度之间的关系，从而建立基于整体参数的复杂电磁环境自适应评估模型。在确保整体参数与电磁环境复杂度等级存在且唯一的前提下，求解评估模型的目标函数，并给出最优逼近算法。最终提出基于广义S变换的电磁环境复杂度评估方法。本项目的研究可为电子信息系统在复杂电磁环境下的应用提供参考依据，具有重要的科学研究意义和实际应用价值。

中文关键词： 复杂电磁环境；复杂度评估；S变换；时频分析

英文摘要： Complexity evaluation is an important way to anti-electromagnetic interference, but scientific choice and extract parameter is the key problem of it. The traditional complexity evaluation parameter of electromagnetic environment is calculated independently through Fourier transform. The integrality and relationship of evaluation parameters were neglected in these researches. .In this project, a new idea is proposed to evaluate complexity of electromagnetic environment based on generalized S-transform. The main research contents are as follows: Firstly, based on the principle generalized S-transform, analytic expression of time complexity, frequency complexity and energy complexity is derived simultaneously in the S-transform time-frequency domain, and the relationships between of them are analyzed. The inner rules and features of complex electromagnetic environment could be shown in the results. Secondly, a kind of self-adaption complexity evaluation model will be built by using of the time-frequency characteristic parameter. Its aim function and approximation algorithm are determined when the joint parameter and the degree of electromagnetic environment is uniquely exists. Finally, a novel evaluation method is proposed based on generalized S-transform. With the study of this project, the performance anti-interference of electronic systems in complex application environment can be improved, and the advanced methodology based on generalized S-transform for complex electromagnetic environment is provided.

英文关键词： complex electromagnetic environment ;complexity evaluation;S-transform;time-frequency analysis