A new method of demodulating the digital frequency modulation signals  

作　　者：Jin-cai Sun Wei-jie Zhu Yi-yun Sun and Hui Xiao 

出　　处：《Journal of Marine Science and Application》2003年第2期5-10,共6页船舶与海洋工程学报（英文版）

基　　金：the National Natural Science Foundation of China (60272077) ;the Science Foundation of Aeronautics (02F53030).

摘　　要：A new method of estimating the frequency-known signals from the strong background noise was presented first. Then the new method was used in the demodulation of the digital frequency modulation (FSK) signals. The new demodulation method can complete the demodulation of the FSK signals only with the carrier frequency and without any carrier phase information. The simulation results show that the performance of anti-noise of the new method is better than that of the incoherent demodulation method and the fluctuation of the carrier phase has little effect on the new method. So the new demodulation method has a fine prospect in the practical applications.

关 键 词：digital frequency modulation signals underwater acoustic communications DEMODULATION DETECTION 

分 类 号：O427.1[理学—声学]