An Interference Signal Signature Analysis Algorithm Based on High Order Cumulants
A kind of signal space characteristic estimate method is proposed in this article based on higher order cumulants, which is suitable for parameter estimation of interference signal under multi-path propagation environment. By uniform linear array and its improving, we developed an analysis model of receiver that mixed signal and interference. In order to research time-frequency distribution at different interference level, third-order cumulants spectrum was employed to analysis higher order time-frequency distribution. Moreover, higher order time-frequency distribution and its time axis slice spectrum are calculated and analyzed. The simulation result indicated that higher order the frequency distribution and its slice spectrum have the higher disturbance resolution. This algorithm is suitable for willfully additive Gauss (white or colored) under the noise environment radio disturbance discriminating. The theoretical analysis and the simulation result showed the method validity and robustness.