现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
15期
1-4,8
,共5页
天发地收系统%展宽一阶海杂波%空时自适应处理%局域联合处理算法
天髮地收繫統%展寬一階海雜波%空時自適應處理%跼域聯閤處理算法
천발지수계통%전관일계해잡파%공시자괄응처리%국역연합처리산법
sky-surface system%broadening first-order sea clutter%space-time adaptive processing%local area joint treat-ment algorithm
天发地收高频雷达的双基地特征使其一阶海杂波具有空时耦合性，但在双基地角和电离层扰动的作用下一阶海杂波产生明显的多普勒展宽，会淹没慢速舰船目标。以一阶海杂波空时耦合性为基础，理论推导并验证了其空时分布，利用波束相关性选择空时自适应降维处理算法的局域大小，有效地抑制了展宽海杂波并检测到被淹没的目标。
天髮地收高頻雷達的雙基地特徵使其一階海雜波具有空時耦閤性，但在雙基地角和電離層擾動的作用下一階海雜波產生明顯的多普勒展寬，會淹沒慢速艦船目標。以一階海雜波空時耦閤性為基礎，理論推導併驗證瞭其空時分佈，利用波束相關性選擇空時自適應降維處理算法的跼域大小，有效地抑製瞭展寬海雜波併檢測到被淹沒的目標。
천발지수고빈뢰체적쌍기지특정사기일계해잡파구유공시우합성，단재쌍기지각화전리층우동적작용하일계해잡파산생명현적다보륵전관，회엄몰만속함선목표。이일계해잡파공시우합성위기출，이론추도병험증료기공시분포，이용파속상관성선택공시자괄응강유처리산법적국역대소，유효지억제료전관해잡파병검측도피엄몰적목표。
The first-order sea clutter of HF sky-surface radar represents apparent space-time coupling because of its bistatic characteristic,but the first-order sea clutter may produce obvious Doppler broadening under the influence of bistatic angle and ionospheric disturbance which leads to the submerging of the low velocity ships. On the basis of first-order sea clutter space-time coupling characteristic,the space-time distribution of the first-order sea clutter was derived and verified in theory. Space-time adaptive processing (STAP) successfully suppressed the broadening sea clutter and found the submerged target by means of beam correlation to choose the size of local area in space-time adaptive dimension reduced algorithm.
