Research on FRFT_CSS Underwater Acoustic Communication Based on Passive Time Reserve Mirror

Chirp spread spectrum system based on fractional Fourier transform(FRFT) which has inherent interference rejection capability,has applied into underwater communication.In this paper,we present a FRFT_CSS system based on passive time reserve mirror(PTRM) mehtod to reject the serious mutipath effect caused by the acoustic channals.The system could achieve a good performance and high data rate.The pool results show that using passive time reserve mirror method could improve the system performance significantly.