On a timing recovery technique for a variable symbol rate signal

摘要

In this paper, a variable-rate timing recovery technique which does not require a priori knowledge on the symbol rate is proposed. In order to estimate the unknown symbol rate, cross correlations between the received signal and signals at thefilter bank outputs are utilized. The bandwidth uncertainty produced at the symbol rate estimation process is eliminated at the timing synchronization block. In addition, attempts to reduce the probability of the incorrect estimation have been made usinga repeated estimation. From the simulation results, it is found that the proposed technique estimates the unknown symbol rate with an accuracy 99.5%.