FRFT and Accumulative Integral Based Parameter Estimation for PRBC-LFM Continuous Signal
Zhu Jiandon · Journal of Projectiles.Rockets.Missiles and Guidance · 2013
In view of PRBC-LFM signal analysis,a fractional Fourier transform and accumulative integral based parameter estimation algorithm was proposed. Firstly,the square of received signal was attained to eliminate the effect of PRBC in analysis. Then the FRFT was used to estimate LFM modulation parameter which can also be adopted to reconstruct the LFM signal. The original signal was multiplied with the conjugated reconstruction LFM signal to remove carrier wave and get baseband signal PRBC. Finally,the code width and code sequence of PRBC was extracted using the inflexion point information and the change trend of accumulative integral. Compared with present methods,the proposed algorithm still take on good estimation result even in SNR =- 4dB.