二维数字系统的系数灵敏度和结构优化

本文从二维数字系统的Roesser模型出发,在Kawamata等人定义的灵敏度的基础上,导出了系统传输函数对全体系数的标量灵敏度的新的表达式,并给出了一种降低灵敏度的优化方法,该优化方法不仅可以降低系数灵敏度,还可以提高结构的效率.举例结果表明,新的表达式与Kawamata等人的表达式相比,能更好地与计算机模拟结果相符.

Coefficient Sensitivity and Structure Optimization of 2-D digital Systems

For a two-dimensional (2-D) Roesser model digital system, a new expression of a scalar sensitivity of transfer function with respect to all coefficients is derived from Kawamata et al' s definition of sensitivity 3], and an optimization method for lowering sensitivity is also given in this paper. The optimization method not only lowers sensitivity, but also increases structure efficiency. The example results show that the new expression is more agreeable with the computer simulation results than Kawamata et al' s expression.