Blind Symbol Rate Estimator for CPFSK Signals Based on DWT and CWT
GE Lin-dong · Jisuanji fangzhen · 2008
A novel blind symbol rate estimation algorithm for Continuous-phase Frequency-shift keying (CPFSK) signals was proposed by combining discrete wavelet transform (DWT) and continuous wavelet transform (CWT). Instead of directly dealing with the original signal, CWT was performed for the detailed signal obtained from the DWT, which could greatly reduce the noise, and get an accurate estimation of symbol rate in low Signal-to-Noise Ratio (SNR). Simulation results indicate that the new method can offer more excellent performance in low SNR when it is compared with the CWT-based method.