基于互功率谱的时延估计，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,多姿态，多角度，有不同光照。- Based on the time delay estimation of power spectrum, Monte Carlo simulation method of calculating the American option price and basic descr iption, Much posture, multi-angle, have different light.