信号通过线性或准线性系统时的传输延迟及其失真已经引起人们的特别关注,尤其是彩色电视、数字通讯、精密雷达和航天等现代电子工程系统,因为时延失真是这些系统性能指标提高的一个重要限制因素。如果系统的时延失真过大会引起电视图象过渡边缘串色和爬行;会使通讯产生串话和噪声;会使航天跟踪 Transmission delays and distortions of signals passing through a linear or quasi-linear system have drawn particular attention, especially in modern electronic engineering systems such as color television, digital communications, precision radar and aerospace, as the delay distortion increases the performance of these systems An important limiting factor. If the system is too large distortion of the general led to the edge of the transition of the TV image string color and crawling; will produce cross-talk and noise; will space tracking