Analysis of Multi-component LFM Signals by the Integrated Quadratic Phase Function
基于积分二次相位函数的多分量LFM信号分析

The algorithm based on quadratic phase function is efficient to estimate the parameters of the LFM signals. When it is dealing with the multi-comment LFM signals, spurious peaks arise and interference is severe. A new approach based on integrated quadratic phase function is proposed to solve the problem. The performance of the proposed approach is evaluated by simulation to show that the method presents advantages in terms of that it can suppress the spurious peaks and interference and gives a closer approach to the CRLB and a lower SNR threshold with respect to the quadratic phase function.