Our research targets are as follows : develop fcs - based communication software follow foundation fieldbus protocol ; promote the development and application of fieldbus technology . this paper firstly introduces the generation , meanings , features , advantages , kinds and developing trends of fcs ; then analyses and summarizes the generation , features , and advatanges of ff fieldbus ; researchs ff fieldbus - based communication technology ; research and implement a communication system based on ff fieldbus . the system consist of slow speed h1 and high speed hse 本文首先对现场总线技术的产生、概念、特点、优点、种类及发展趋势进行论述；然后详细分析和总结了ff现场总线的产生、概念、优点；在此基础上研究了fp现场总线的通信技术；研究并实现了基于现场总线的通信系统，该系统主要包括低速的h1总线和高速的hse总线两部分。
The specific research methods are listed : 1 . matched filter taking the max ouput snr as the best rule correlates nonstop divided signal and divided echo to detect low snr target signal . then all one dimension divided correlation outs and done fft in portrait to leach interferential signal such as static or low rate mussy meaves , many pathway echo and so on and to take target ' s time difference and doppler frequency that combine parameters that target ' s direction taken from antenna and so on to implement target ' s orientation and tracking 具体研究方法如下： 1 、采用以输出信噪比最大为准则的最佳匹配滤波器来对分段的参考和目标信号作相关处理来检测低信噪比目标信号，然后对一维分段相关输出组作纵向傅立叶变换来滤除静态或低速的杂波、多径回波等干扰信号，并提取目标的时差和多普勒频率，再结合由天线获得的目标方向等参数，就可以实现目标的定位和跟踪。
