CAJ | 학술논문

提出了一种在卫星广播信号上重叠发射卫星导航增强信号的方法,将差分校正数据经过扩频后发射出去,与卫星广播信号进行频谱重叠,一起经卫星转发。通过参数设计和性能仿真可知,差分增强信号对广播信号的接收解调影响很小,差分接收机可以通过串行干扰抵消的方法从混合信号中提取出差分增强信号,实现解扩与辅助测距,解扩得到的差分校正数据可直接用于差分定位。当混合功率比为26 dB时,捕获概率达99.99%,测距精度为10.67 m,表明了此方法的可行性。
제출료일충재위성엄파신호상중첩발사위성도항증강신호적방법,장차분교정수거경과확빈후발사출거,여위성엄파신호진행빈보중첩,일기경위성전발。통과삼수설계화성능방진가지,차분증강신호대엄파신호적접수해조영향흔소,차분접수궤가이통과천행간우저소적방법종혼합신호중제취출차분증강신호,실현해확여보조측거,해확득도적차분교정수거가직접용우차분정위。당혼합공솔비위26 dB시,포획개솔체99.99%,측거정도위10.67 m,표명료차방법적가행성。
This paper presents a method of launching the satellite navigation enhanced signal overlapped satellite broadcast signal. The differential correction data is transmitted after spectrum spreading. The signal spectrum and the satellite broadcast signal spectrum are overlapped, and retransmitted by the satellite. By the parameter design and the performance simulation, the differential enhanced signal has little effect on the reception and the demodulation of the broadcast signal. The differential receiver can get the differential enhanced signal from the mixed signal by the successive interference cancellation, and despread and sec-ondarily measure distance. When the mixed power ratio is 26 dB, the acquisition probability is 99. 99%, and the ranging accuracy is 10. 67 m, which proves the feasibility of the method.