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提出了基于特征频段功率谱检测的舰船水压场信号检测算法,该方法选取一个较低的接近舰船水压场信号峰值频率的特征频段,计算该特征频段频谱的能量,通过判断频谱能量的大小来检测目标舰船。从连续傅立叶变换出发,通过理论推导,得到了基于离散采样点的特征频段功率谱简化算法。该算法简单且运算量小,易于硬件实现,仿真结果表明该算法有效。
A signal detection algorithm for ship hydraulic pressure field based on power spectrum detection of characteristic frequency band is proposed. This method selects a characteristic frequency band which is close to the peak frequency of the water pressure field signal of the ship and calculates the energy of the frequency spectrum of the characteristic frequency band. By judging the spectral energy The size of the target to detect the ship. Based on the continuous Fourier transform, the simplified power spectrum feature extraction algorithm based on discrete sampling points is obtained through theoretical derivation. The algorithm is simple and has a low computational complexity and is easy to implement in hardware. The simulation results show that the algorithm is effective.