国防科技大学学报
國防科技大學學報
국방과기대학학보
JOURNAL OF NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY
2014年
3期
51-57
,共7页
星载AIS%检测概率%多网冲突%船舶分布
星載AIS%檢測概率%多網遲突%船舶分佈
성재AIS%검측개솔%다망충돌%선박분포
space-based AIS%ship detection probability%multi signal collision%ship distribution
针对现有星载AIS检测概率低的问题,对星载AIS接收信号冲突和检测概率进行了研究和论证,并对影响检测概率的诸多因素进行了分析。分析了星载AIS与地面AIS的差异性,指出了星载AIS面临的新挑战。重点对星载AIS信号多网冲突问题进行了研究,建立了一种基于船舶分布密度函数的星载AIS检测概率模型。通过分析时隙冲突、船舶动态、轨道高度、天线类型和B类AIS船舶等因素对系统检测概率的影响,为工程设计和性能评估提供了一定参考依据。
針對現有星載AIS檢測概率低的問題,對星載AIS接收信號遲突和檢測概率進行瞭研究和論證,併對影響檢測概率的諸多因素進行瞭分析。分析瞭星載AIS與地麵AIS的差異性,指齣瞭星載AIS麵臨的新挑戰。重點對星載AIS信號多網遲突問題進行瞭研究,建立瞭一種基于船舶分佈密度函數的星載AIS檢測概率模型。通過分析時隙遲突、船舶動態、軌道高度、天線類型和B類AIS船舶等因素對繫統檢測概率的影響,為工程設計和性能評估提供瞭一定參攷依據。
침대현유성재AIS검측개솔저적문제,대성재AIS접수신호충돌화검측개솔진행료연구화론증,병대영향검측개솔적제다인소진행료분석。분석료성재AIS여지면AIS적차이성,지출료성재AIS면림적신도전。중점대성재AIS신호다망충돌문제진행료연구,건립료일충기우선박분포밀도함수적성재AIS검측개솔모형。통과분석시극충돌、선박동태、궤도고도、천선류형화B류AIS선박등인소대계통검측개솔적영향,위공정설계화성능평고제공료일정삼고의거。
Aiming at solving the low detection probability problem of space-based AIS,the received signal collision phenomenon and ship detection probability model were studied.The difference between Space-based AIS and traditional terrestrial AIS was compared and analyzed.And the new technical challenge of space-based AIS was pointed out.The problem of AIS signals collision from multi SOTDMA cells was studied in detail.The detection probability model based on ship density function was established theoretically.The effects of slot collision,orbit height, antenna swath and Class B ships on detection probability were estimated quantitatively by simulations,which can provide theoretical reference for designing and evaluating the space-based AIS in the future.