采用了小波去噪的思想，计算目标和海洋回波的功率谱密度,用蒙特卡洛模拟的方法计算美式期权的价格以及基本描述。- Using wavelet denoising thought, Calculating a target and ocean echo power spectral density, Monte Carlo simulation method of calculating the American option price and basic descr iption.