摘要
文章以平方定时估计算法为基础,研究了一种改进的定时同步算法。该算法在做平方运算之前加数字预滤波器以减小噪声的影响,然后结合二阶卡尔曼滤波,在考虑短波信道频率偏移的影响下,对定时误差进行平滑滤波,以减小定时抖动。仿真结果表明:改进算法大大降低了定时估计的均方误差,提高了定时性能。
Based on square timing recovery algorithm, this paper presents an improved timing synchronization approach which adds a digial prefiher before square operation to reduce the effect of noise, and filter the timing error with a Second-order Kalman filter to reduce timing jitter considering the frequency offset effect in HF Channel. Simulation results show that the improved algorithm reduces the MSE of timing estimation significantly and enhances the performance of the timing recovery algorithm.
出处
《信息工程大学学报》
2009年第3期333-335,360,共4页
Journal of Information Engineering University
基金
国家自然科学基金资助项目(60472064)
