说明：  基于FPGA的小数分频器的实现 频率合成技术是现代通讯系统的重要组成部分,他将一个高稳定和高准确度的基准频率,经过四则运算,产生同样稳定度和基准度的频率。
(FPGA-based implementation of the fractional divider frequency synthesis technology is an important component of modern communications systems, he has a high stability and high accuracy reference frequency, after four operations, have the same degree of stability and the frequency of reference.)