摘要
讨论一种用于某无人机直序扩频通信测控系统的PN码捕获方案。根据该系统的技术指标要求,针对无人机信道的特殊性,采用匹配滤波器进行PN码的相关处理,并运用检测后积分和二次驻留的方法提高检测概率降低虚警概率。在进行详细理论分析的基础上,运用Cadence公司的SPW系统仿真软件,将该系统在高斯白噪信道和无人机信道下进行对比性系统仿真,仿真结果以及FPGA实测结果均表明,上述两种方法有效地提高了系统性能。
The design of the PN code acquisition of the Direct Sequence Spread Spectrum(DSSS) system for a Unmanned Aerial Vehicle(UAV) TT&C System is described in this paper.To satisfy the design objectives and connect with the particularity of the UAV channel,a Match Filter is chosen to do the correlation of PN code.A series of methods of signal processing are used to increase the detection probability and decrease the false alarm probability.After detail theory analysis,the system with AWGN channel and UAV channel are simulated respectively,using SPW,the system simulation tool of cadence.Both the results of the simulation and the FPGA implementation test indicate that the two methods improve the performance of the system effectively.
出处
《遥测遥控》
2006年第4期34-38,共5页
Journal of Telemetry,Tracking and Command
关键词
无人机
直序扩频系统
匹配滤波器
检测后积分
二次驻留
信号捕获
Signal capture
Unmanned Aerial Vehicle
Direct Sequence Spread Spctrum System
Detection integral operation,Coincidence detector operation
