认知天波超视距雷达低可探测目标检测方法研究

项目名称： 认知天波超视距雷达低可探测目标检测方法研究

项目编号： No.61471391

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 陈建文

作者单位： 中国人民解放军空军预警学院

项目金额： 81万元

中文摘要： 低可探测目标检测与电离层分析技术已成为新一代天波超视距雷达的研究热点，电离层污染与复杂电磁环境下小、慢目标探测严重限制了天波雷达目标检测性能的提升，有待深入研究。认知雷达作为一种新型雷达概念，可全面提升雷达系统能力，是雷达技术发展的重要方向。本项目以新一代认知天波超视距雷达为研究对象，以环境感知为基础，以雷达系统主动适应外部环境的非平稳变化能力为核心，研究小、慢低可探测目标检测的收发联合自适应处理方法。通过架构设计，分析系统主动适应外部环境的机制；通过研究电离层信道污染与杂波环境感知、发射信号波形设计与优化、收发闭环联合自适应处理方法等关键问题，实现基于在线预测与知识辅助的低可探测目标检测，拟解决天波雷达系统性能受外部环境制约的瓶颈问题。预期研究成果有助于提升天波雷达低可探测目标的检测性能，拓展同时执行多任务的功能，丰富发展中的认知雷达应用基础理论，因而具有重要的理论价值和广阔的应用前景。

中文关键词： 天波超视距雷达；认知天波超视距雷达；电离层感知；信号优化设计；低可探测目标检测

英文摘要： The low observable target detection and ionosphere analysis techniques have become the research hotspot of Skywave Over-The-Horizon Radar(SWOTHR). Ionosphere contamination and small, slow target detection in complex electromagnetic environments are bottleneck of improving SWOTHR's target detection performance.This problem is needed to be further studied.As a new type of radar concept, cognitive radar can improve the system adaptability, is the important direction of the development of radar technology. This project focuses our attention on the new generation of the Cognitive Skywave Over-The-Horizon Radar (CSWOTHR), based on the environmental perception and with the skywave radar active adaptation ability as core, carries out the research in view of the small, slow low detectable targets detection with the joint adaptive processing method of transmiting and receiving.The mechanism of system actively adapting themselves to the external environments based on the system architecture design is analysed. Through analyzing the key problems such as the ionospheric channel contamination and the clutter environments cognition, transmitting signal waveform design and optimization, the joint adaptive processing methods of transmiting and receiving,the low observable target detection based on knowledge aid and the online estimation is implemented to relax the bottleneck problem that the performace of SWOTHR is conditioned by the external environments.The Expected research results will improve performance of SWOTHR to detect low observable targets, expanding the function of executing multiple tasks , broaden the developing cognitive radar theory, and thus has important theory value and broad application prospects.

英文关键词： Skywave Over-The-Horizon Radar (SWOTHR);Cognitive Skywave Over-The-Horizon Radar (CSWOTHR);Ionosphere Sensing;Signal Optimisation Design;Low Observable Target Detection