格梯形算法，算法收敛度高，稳定。采用横向结构对信号进行分解，梯形部分得到信号估计，与主通道对消，消除两个通道相关信息。但算法对初时设定值比较敏感，实际应用中，要进行测试后设定。-Lattice Trapezoid algorithm convergence and high stability. Horizontal structure of the signal decomposition, partially trapezoidal signal is estimated that the