【摘要】 首次将宽带调频连续波发射波形引入近程多站雷达系统，利用宽带调频连续波雷达信号的高距离分辨率分析了近程细柱状目标几何中心定位的性能，提出了利用回波频谱估计细柱状目标长度的方法并给出了计算表达式，对系统性能进行了计算机仿真，所得结果对工程实践有一定的指导意义更多还原

【Abstract】 A 3 D radio propagation model based on GO and GTD theory is discussed. This model is used to predict propagation loss in an urban environment. The model takes into consideration the reflection from the ground and building walls, diffraction from corners and roofs, for the calculation of path propagation loss in OOS areas.更多还原