摘要
在研究时延估计中二次相关法的基础上,为了进一步提升二次相关法在更低信噪比条件下的可用性,结合广义互相关中的广义权函数,对二次相关法中的两次互相关分别进行平滑相干变换(SCOT)加权处理.实验仿真结果表明,与二次相关法以及广义二次相关法相比,基于SCOT双加权二次相关的时延估计算法在信噪比低时仍具有较高的时延估值精度.
On the basis of studying the second correlation method in time delay estima tion, in order to further improve the availability of the second correlation method under low er signal to noise ratio conditions, combined with the generalized weight function in general ized cross correlation, the two cross correlations in the second correlation method are weigh ted with SCOT separately. The experimental simulation results show that compared with the second correlation method and the generalized second correlation method, timation algorithm based on SCOT cy of time delay estimation when t double weighted second correlation still he SNR is low. the time delay es has a high accura
作者
张宇
严天峰
ZHANG Yu;YAN Tianfeng(School of Electronic and Information Engineering,Lanzhou Jiaotong University Lanzhou 730070,China;High precision Positioning Technology Compass Engineering Laboratory of Gansu Province,Lanzhou 730070,China;Radio Monitoring and Technology Center of Positioning Industry of Gansu Province,Lanzhou 730070,China)
出处
《全球定位系统》
CSCD
2018年第5期53-57,共5页
Gnss World of China
基金
甘肃省自然科学基金(批准号:1508RJZA071)
中国铁路总公司科技研究开发计划(编号:2013G010-D)
关键词
SCOT
双加权
二次相关
时延估计
估值精度
SCOT
double weighted
second correlation
time delay estimation
valuation accuracy
