摘要
针对目前PN码相位测量抗干扰能力有限的问题,提出了一种新的PN码相位测量方法;该方法以PN码的相关函数为基础,以峰值点为分界点对相关峰曲线两侧分别做最小二乘直线拟合;然后求出两条直线的交点坐标,其中横坐标与零相偏参考值的差值就是PN码相位的估值;该方法与目前常用的最小二乘同步法和三点二次插值PN码相位测量法相比较,算法复杂度增加有限;通过仿真数据可以得出,新的PN码测量方法在信噪比较低的情况下能得到比最小二乘同步法和三点二次插值法更加稳定和精确的估值结果。
In view of the current PN code phase measurement＇ santi--interferenceabilityislimited, presents a new PN code phase measurement method, the method based on the correlation function of PN codes, with the peak point as dividing point, on both sides of correlation curves were linear least square fitting. Then calculate the intersection point of the two straight coordinate, the difference of horizontal coordinate phase offset and the zero phase offset reference value is the PN code phase estimation. In this paper, the method and the commonly used least squares synchronization method and three point two times interpolation PN code phase measurement is method to do comparison, compared to the other two algorithm, this method＇ s complexity is only slightly increased. The simulation shows that, the anti noise performance of this new PN code phase measurement method is better than least squares synchronization method and three point two times interpolation PN code phase measurement method.
出处
《计算机测量与控制》
2015年第3期727-729,733,共4页
Computer Measurement &Control
基金
国家部委基金资助课题(51310020401)
关键词
三点二次插值
最小二乘法
分段直线拟合
PN码相位测量
抗噪声
3--points quadratic interpolation
least Squares （LS）
piecewise linear fitting
PN code phase measurement
anti noise
