CAJ | 학술논문

该文提出一种应用于射频系统群时延测量的相关峰精化算法，用于提高调制法测量群时延的测量精度。该算法通过对信号进行预先插值而后相关的方式，降低了对采样率的要求；获得比传统算法更高的精度，并利用小波去噪增强了低信噪比条件下的鲁棒性。基于matlab的仿真表明，该算法能够更精确地获得一个采样间隔以内的时延部分，验证了其有效性及优势。
해문제출일충응용우사빈계통군시연측량적상관봉정화산법，용우제고조제법측량군시연적측량정도。해산법통과대신호진행예선삽치이후상관적방식，강저료대채양솔적요구；획득비전통산법경고적정도，병이용소파거조증강료저신조비조건하적로봉성。기우matlab적방진표명，해산법능구경정학지획득일개채양간격이내적시연부분，험증료기유효성급우세。
A fining algorithm of correlation peak is proposed for measuring group delay of Radio Frequency (RF) systems to improve the measurement precision. This algorithm requires lower sampling rate by interpolating the signals before correlation operations, and obtains higher measurement precision than classic methods. Wavelet de-noising is also introduced to enhance the robustness under low Signal-to-Noise Ratio (SNR). Simulations based on matlab show that the proposed method can obtain the delay part less than the sampling interval more precisely, and prove its effectiveness and advantages.