An improvement of an all digital timing recovery algorithm
Wang Yuhong Xue Xiaoming Fan Changxin Li Jiandong (Research Inst. of Information Science, Xidian Univ., Xian, 710071)
The digital algorithm of timing recovery which uses the square circuit and digital filter has the shortcoming that the variance of the estimated phase is relatively large when the roll off factor α is small. To improve its performance, before the signal is squared, it is filtered by a bandpass filter. Simulation shows that the performance has been greatly improved when the roll off factor α is small.