Blind Parameter Estimation of Frequency-Hopping Signals Based on Atomic Decomposition

The parameter estimation of frequency hopping signals under non-cooperative conditions is a key problem to which more attentions are being paid in the field of signal processing. According to the structure of frequency hopping signals, three-parameter time-frequency atoms were obtained from Gabor functions by successive applications of scaling, time-shift and frequency-shift operators, and a new atomic decomposition based parameter estimation method of frequency-hopping signals was developed. Using this method, the parameters of frequency hopping signals, such as hop duration, hopping time and hopping frequencies, can be estimated without knowing any priori knowledge. Simulation results show that the method is effective.