Blind Estimation of Baud-rate of Communication Signals
Zhang Ai · Journal of Changchun University of Science and Technology · 2010
This paper presents a method to estimate the baud-rate of a linearly modulated digital communication signal in blind environments.The proposed scheme first filters the input signal by using a bank of lowpass filters.For each filtered output,a fourth order cumulant function will be estimated,and its local peaks satisfying certain conditions will be selected as candidates of baud-rate line,where each candidate will be assigned a metric of confidence to denote its degree of belonging to the true baud-rate.Finally,candidates with a same frequency obtained from different filter outputs will be merged as one candidate,and the frequency of the candidate with the largest total metric of confidence will be taken as estimate of the baudrate.The proposed method has been validated via simulations.