卫星广播信号上重叠发射导航增强信号的方法  

A Method of Launching Navigation Enhanced Signal Overlapped Satellite Broadcast Signal

作　　者：沈燕群[1] 宋茂忠[1,2] 王旭东[1] 孟斌[2] 

机构地区：[1]南京航空航天大学电子信息工程学院,南京210016 [2]中国航天科技集团公司卫星应用研究院,北京100086

出　　处：《电讯技术》2013年第12期1563-1568,共6页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(61201208);中国航天科技集团公司卫星应用研究院创新基金项目(20121512);江苏高校优势学科建设工程资助项目~~

摘　　要：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。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.

关 键 词：卫星导航 频谱重叠 干扰抵消 差分定位 

分 类 号：TN967.1[电子电信—信号与信息处理]