Spatial higher order time-frequency distribution and virtual time-frequency ESPRIT algorithm
Chen Tian-qi · Chinese Journal of Radio Science · 2006
A new spatial higher order cumulant L-Wigner distribution based on L-Wigner distribution (LWD) is defined, and a scheme of DOA estimation for multiple PPS signals is presented by employing virtual time-frequency ESPRIT algorithm with extended array. The LWD of PPS signals can be obtained by smoothing pseudo WVD to suppress the cross-term and improve the time-frequency concentrativity. Meanwhile, time-frequency analysis combined with high order cumulant, the scheme exhibits the property of virtual extended array. Thus, the high precision and high resolution DOA estimation can be implemented. Theoretical analysis and simulation show the high performance of the proposed method.