基于STEL-2000A的基带扩频系统的设计

Design of baseband spread spectrum system based on STEL-2000A

针对无线通信系统抗干扰性差、抗多径性能弱的缺点,设计了一个抗干扰性强的的高速基带扩频收发系统。该系统以专用扩频芯片STEL-2000A为核心,以EP3C10E芯片为外围控制芯片,辅以高速A/D、D/A芯片,从而实现了系统功能。首先给出了系统总体原理图,并对硬件设计部分进行详细的讨论,其次,在软件设计部分给出了算法总体设计流程框图。该系统软件设计部分采用VHDL硬件描述语言,实现了FPGA对专用扩频芯片的控制,同时也实现了对系统中各个主要器件时钟的统一,最后给出了系统调试结果,证明了系统的可行性。

General wireless communication system has many has many shortcomings,for example the poor ability of anti-interference, anti-jamming.This paper proposes baseband spread spectrum system which have strong ability to anti-interference.STEL-2000A is the core of this system supplemented by A/D,D/A,and the EP3C10E is working for controlling the system. Firstly,giving the schematic diagram of the whole system and the design of hardware parts are discussed in detail,secondly,the overall software design part algorithm is given. The system software design part use VHDL to make the FPGA control STEL - 2000A and provide clock for the while system. Finally, giving the system debugging results, and proving the feasibility of this system.