Synthetic Aperture Radar-jamming And Anti-jamming And Performance Evaluation

Synthetic Aperture Radar (SAR) is a kind of active microwave imaging radar. It can all-weather,all-day and timely get ground images of wide region and has fine penetrability to vegetation and ground.. SAR is pretty important to resources exploitation and military reconnaissance and has been widely used in diverse fields of civil and military.More and more technological workers domestically and abroad have devoted themselves to research activities in this area.. This paper delves into the research of SAR jamming technology,the evaluation of jamming effect and the research of SAR anti-jamming technology from three sides. First, author studies oppressive jamming technology of SAR and beguiling jamming technology of SAR , analyses backuping jamming ,random pulse jamming and accompanying fly mode in the research of oppressive jamming technology. then author analyses rebound mode in the research of beguiling jamming technology,and makes corresponding simulation experiments. Then in the evaluation of jamming effect, author studies the evaluation of jamming effect from three sides such as subjective evaluation,SAR image quality guideline and the jamming evaluation effect of SAR based on the recognition of object,which detects object by constant false alarm ratio means,classifies the object by the recentest neighbour means, and makes corresponding simulation experiment. In the end , in the research of SAR anti-jamming technology, author studies the anti-jamming means of narrowband jamming and pulse jamming,emphasizedly analyses anti-jamming with wavelet transform in the image domain, mainly analyes the denoise by wavelet soft valve,wavelet and wavelet packet decomposition, wavelet and wavelet packet decomposition may decompse the signal into a break frequency segment signal, therefore, these separate the jamming from signal. Some valuable conclusions are summarized by theoretical analysis and simulation experiments : accompanying fly mode's superiority lies in realizeing recent distance jamming,consequently,this need jammer's power is small. Rebound mode brings some false object, therefore, it is a effective jamming mode. In the aspect of the evaluation of jamming effect, when jamming is 8db, the object is entire submergence and hardly...