公开(公告)号：US20110194402A1

公开(公告)日：2011-08-11

申请号：US13022078

申请日：2011-02-07

申请人： MATTHEW J. SHERMAN ,  GARY R. LOMP ,  ANDREW M. COMBA ,  DAVID A. HAESSIG, JR. ,  JOEL D. REISS

发明人： MATTHEW J. SHERMAN ,  GARY R. LOMP ,  ANDREW M. COMBA ,  DAVID A. HAESSIG, JR. ,  JOEL D. REISS

IPC分类号： H04J11/00 ,  H04L12/26

CPC分类号： H04L43/0858 ,  G01S5/0221

摘要： A system and method for calculating a time of arrival (TOA) of an electromagnetic signal is presented. A method receives a fast Fourier transform (FFT) signal that is a FFT of an original electromagnetic signal containing symbol data. The FFT signal is either multiplied or divided with a value to remove the symbol data. Removing the symbol data generates a perturbed data values representing perturbed signal with a perturbed covariance. The method calculates a perturbed covariance of the perturbed data values. After the perturbed covariance is calculated, the method at least partially corrects the perturbed covariance to produce a corrected covariance. The TOA of the original electromagnetic signal is calculated based, at least in part, on the perturbed covariance.

摘要翻译： 提出了一种用于计算电磁信号到达时间（TOA）的系统和方法。 一种方法接收作为包含符号数据的原始电磁信号的FFT的快速傅里叶变换（FFT）信号。 FFT信号被乘以或除以一个值去除符号数据。 去除符号数据会产生扰动的数据值，表示扰动信号与扰动协方差。 该方法计算扰动数据值的扰动协方差。 在计算了扰动协方差之后，该方法至少部分地校正扰动协方差以产生校正的协方差。 至少部分地基于扰动协方差来计算原始电磁信号的TOA。