单载波多信号分量导航信号检测性能评估

The Detection Performance Assessment for Single Carrier with Multi-signal Component Navigation Signal

在导航系统信号体制设计过程中,广泛引入了单频波多信号分量的设计思想,信号体制的检测性能评估是信号体制设计中不可缺少的环节。基于上述考虑,分析评估了单频波多信号分量信号体制对导航信号检测性能的影响。以时分Alt BOC(TD-Alt BOC)为例,采用理论模型和蒙特卡罗仿真分析了采用1~4个信号分量联合捕获时的检测概率、接收机工作特性(ROC)曲线和平均捕获时间(MAT)。试验结果表明,多信号分量联合检测是一种较好的单载波多信号分量导航信号的检测策略,相对于单信号分量的检测性能,可提高检测灵敏度3~6 d B,降低平均捕获时间5%~30%。

In the process of satellite navigation signal structure design,the assessment of detection performance plays an importantrole in the process of satellite navigation system design. The design idea of single carrier with multi-signal component is introduced,and the effect of this design idea on detection performance is analyzed in this paper. The detection probability, Receiver Operating Characteristic （ROC） and Mean Acquisition Time （MAT） using 1 - 4 signal components for TD-AltBOC are analyzed by theoretical analysis and Monte Carlo simulation. The theoretical and simulated results show that multi-signal component combined detection method is a better detection method for single carrier with multi-signal component signal, and this method can provide 3 - 6 dB acquisition sensitivity improvement compared with the single signal component acquisition method, and reduce the mean acquisition time by 5%-30%.