Time delay estimation method based on cross-correlation signal phase decomposition

• Main Authors: YU MUDAN, JIANG ZHIDI, CAO SHIJIE, ZHAO XINDONG, QIU LU, WU ZHENQIAN
• Format: Patent
• Language: Chinese; English
• Published: 30.06.2020
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a time delay estimation method based on cross-correlation signal phase decomposition. The method comprises the following steps that received signal propagation delay are decomposed into K full periods and Psi phase offset; an extreme value of a correlation coefficient between a cross-correlation signal and a single-periodic function signal is obtained by setting the single-periodic function signal, and then full-period phase shift is performed in the direction of zero moment to obtain a first oscillation starting point of the cross-correlation signal, so that the time delay of a received signal is obtained. The whole operation process is low in complexity, the method is very suitable for being achieved in any embedded chip programming based on the C language, wide scene adaptability is achieved, and a high-precision measurement result can be obtained. 本发明公开了一种基于互相关信号相位分解的时延估计方法，将接收信号传播延时分解为K个整周期和ψ的相位偏移；通过设置单周期函数信号，求得互相关信号与所述单周期函数信号间的相关系数的极值，再往0时刻方向进行整周期移相，求得互相关信号的第一个起振点，从而得到接收信号的时延。整个运