Underwater Acoustic Frequency Demodulation System Based on High-Q Filter

Since underwater acoustic frequency-hopping (FH) communication system requires high resolution of frequency, an implementation method based on high-Q filter is proposed in this paper. Firstly, frequency demodulation system is briefly introduced. According to the given performance requirements of the filter, different implementation methods of the filter are compared. The equiripple approximation method with maximal error minimization principle is used to design FIR filter. Then the coefficients of FIR filter are obtained through MATLAB simulation. The digital signal processor TMS320C5416 made by TI Co. is used to implement the filter in the simulation