在过去十年内在通信工业中出现了一种用数字技术取代各种模拟信号处理功能的倾向。很明显，仅仅用传统的模拟方法不能充分满足对更高的速度更大的容量更大的灵活性和优良的可靠性的日益增长的需求。为了满足上述要求。例如，蜂窝式无线电设备等许多模拟通信系统正在转变为... In the past decade there has been a tendency in the communications industry to replace various analog signal processing functions with digital technologies. It is clear that the mere fact that traditional simulation methods do not fully meet the growing demand for greater speed, greater capacity, greater flexibility, and superior reliability. In order to meet the above requirements. For example, many analog communication systems, such as cellular radios, are changing to ...