摘要
CPLD(复杂可编程逻辑器件)技术的普及与应用已成为不可逆转的潮流。高等院校也开始逐步将CPLD技术纳入教学计划中,这必然要配有相应的实验课程。QPSK(正交相移键控)调制技术应用相当广泛,已成为许多大型系统的主要调制手段。在这样的情况下设计一种既能满足正常实验教学要求,成本又低且稳定的实验系统已成为迫切的需要。本文在MAXPLUS2环境下采用原理图输入和文本输入相结合的方法产生了QPSK的调制信号。文中不仅给出了QPSK的调制框图,并且完整描述了各个部件CPLD的实现方法,最后把整个系统下载测试,验证了该实验方案的正确性。
The popularization and application of the technology of CPLD has developed quickly. Universities has also take the technology of CPLD in their education planning, so it＇s necessary for us to match some relevant experiment courses. The technology of QPSK has been applied in a lot of fields, it＇s the main modulation method in some big system. In all senses design a low-cost and steady experimental system for the normal teaching requirement is very important. The paper uses the two input methods of principle drawings and text to produce the QPSK signal. In addition, this paper not only provides modulated plot of QPSK, but also describes the realization method completely. At last, the article depicts the process of downloading the system and verifies the truth of this scheme.
出处
《电子工程师》
2008年第4期18-20,共3页
Electronic Engineer
