用于防撞的三维毫米波雷达设计

受波束调度灵活性、接收通道数目限制,目前分集相控毫米波防撞雷达主要采用距离/方位二维扫描.由于缺乏目标高度信息,若雷达前方出现不影响载体通行的高/低目标,容易造成防撞雷达的障碍误报.针对这一问题,本文提出基于MIMO和分集相控雷达结合的天线排布和信号处理方法,实现对场景的三维检测.与二维防撞雷达相比,该方法在不增加雷达接收通道数且几乎不增加雷达尺寸的前提下能有效实现方位和俯仰的联合测角.与二维稀布接收阵雷达相比,本文设计雷达不会产生方位栅瓣,适合复杂背景下的多目标检测.     

ENTROPY SOLUTIONS FOR FIRST-ORDER QUASILINEAR EQUATIONS RELATED TO A BILATERAL OBSTACLE CONDITION IN A BOUNDED DOMAIN

This paper is devoted to the existence and the uniqueness of the entropy solution for a general scalar conservation law associated with a forced bilateral obstacle condition in a bounded domain of R^P, p ≥ 1. The method of penalization is used with a view to obtaining an existence result. How-ever, the former only gives uniform L^∞-estimates and so leads in fact to look for an Entropy Measure-Valued Solution, according to the specific properties of bounded sequences in L^∞. The uniqueness of this EMVS is proved. Classically, it first ensures the existence of a bounded and measurable function U entropy solution and then the strong convergence in La of approximate solutions to U.