通过虚拟阵元进行DOA估计，已经调试成功.内含m文件，可直接运行，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。- Conducted through virtual array DOA estimation, Has been successful debugging. M contains files can be directly run, Monte Carlo simulation method of calculating the American option price and basic descr iption.