基于FPGA的可配置扰码模块设计与应用

Design and Application of the Configurable Scrambling Code Module Based on FPGA

随着FPGA容量与运算速度不断提高,可以设计出基于FPGA的通用数字系统,根据不同应用需求通过用微机向FPGA发送相应的配置指令使数字系统各组成模块实现自行配置。扰码由于自身的功能特点在数字通信和帧数据传输等领域有着重要的应用。扰码模块的可配置设计是整个系统通用化设计的重要一环。针对扰码的特点和生成原理提出了二维指令配置的方法,结合示例框图和VHDL程序对设计进行深入阐述,并给出应用ModelSIM软件对可配置设计的仿真结果。

As the continual improvement of FPGA＇s capacity and calculating speed, the design of configurable digital systems based on FPGA becomes possible. The configurable digital system can adjust the structures of the internal modules on basis of the commands sent by computer to fulfill different applications. The scrambling code plays a very important role in the filed of digital communication and frame data transferring. The design of the configurable scrambling code module is a key point in the whole configurable system＇s designing. Aiming at the scrambling code＇s characteristic and principle, the method of two - dimension configuration is brought forward. The diagrams and VHDL codes are given to expound the configurable design deeply. The ModelSim software is used to give the simulation result.