中文说明：无人水下航行器信号检测系统工作在水下5m~15m，以28节的速度航行；要探测水下24节以下航速，距离5km~10km，目标反射强度15dB的航行器，海深500m，海况3级，目标可在水下400m以内的深度活动。要求虚惊概率5%，设计该系统，并给出检测概率。系统参数包括：系统工作频带、发射CW信号的脉宽、发射声源级、接收机的自动增益范围、信号处理方法，最后给出所设计系统的检测性能。
English Description：
The signal detection system of unmanned underwater vehicle works at the speed of 28 knots, which is 5m ~ 15m underwater. To detect an underwater vehicle with the speed of less than 24 knots, the distance is 5km ~ 10km, and the target reflection intensity is 15dB, the sea depth is 500m, the sea condition is grade 3, and the target can move within 400m underwater. The system is designed and the detection probability is given. The system parameters include: working frequency band, pulse width of CW signal, emission source level, automatic gain range of receiver, signal processing method. Finally, the detection performance of the designed system is given.