频率估计：Pisarenko谐波分解算法、music算法和esprit算法对有干扰的信号频率进行估计，并且计算估计频率的均值和方差。-Pisarenko、music和esprit

TITLE : Personnel Information System Developed in: C++ Objective: To maintain a database of personnel information with facilities of add, search, modify, delete, display. Special Features: Password protected encoded database.