总体最小二乘方法的谐波频率估计。线性参数估计问题广泛存在于众多科学与工程学科，如信号处理、自动控制、系统理论、物理、化学工程、统计学、经济学、生物学、医学和军事工程等。最小二乘方法是最常用的线性参数估计方法。-Total least squares method of harmonic frequency estimation. Linear parameter estimation problem is widespread in many scientific and engineering disciplines, such as signal processing, automatic control, systems theory, physics, chemical engineering, statistics, economics, biology, medicine and military engineering. Least-squares method is the most common linear parameter estimation methods.