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doppler
- 该程序用来模拟导弹与目标之间一个接近过程
speed
- 飞思卡尔单片机mc9s12dg128三种测量脉冲速度的方法实现-Freescale microcontroller Mc9s12dg128 three measuring pulse doppler program
1propagation
- Radio Propagation • Large scale fades – Attenuation: in free space, power degrades by 1/d2 – Shadows: signals blocked by obstructing structures • Small scale fades – Multipath effects: » Rapid changes in signal strength over
idocdown
- (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请描述：自己用计算机产生的经典谱是正确的依据。-(3) with Simulink tools to write code (S-Function mode), to produce a single path Rayleigh channel Doppler spectrum is the classical spectrum, in which the
ultrasonic120170603
- 超声波传感器是将超声波信号转换成其他能量信号（通常是电信号）的传感器。超声波是振动频率高于20KHz的机械波。它具有频率高、波长短、绕射现象小，特别是方向性好、能够成为射线而定向传播等特点。超声波对液体、固体的穿透本领很大，尤其是在阳光不透明的固体中。超声波碰到杂质或分界面会产生显著反射形成反射成回波，碰到活动物体能产生多普勒效应。超声波传感器广泛应用在工业、国防、生物医学等方面。(Ultrasonic sensor is a transducer that converts ultrasoni