适用于CCSDS标准的RS(255,223)码编码器设计*

研究了在CCSDS标准下RS编码器的时域编码方法。分析了RS码的编码原理，基本单元电路设计，包括有限域加法器和乘法器，并着重阐述了自然基下常系数并行乘法器的实现方法。在此基础上，选用系数对称的生成多项式，在QuartusⅡ5.0编译环境下设计了RS(255,223)对称结构的编码器，节约了硬件资源，给出了仿真结果图，经检验输出结果正确。采用此方法设计的RS(255,223)编码器具有控制单元简单、模块结构规则，易于FPGA实现，可用于高速场合等特点。

Design for RS (255,223) encoder based on CCSDS criteria

This paper researched a kind of Reed-Solomon (RS) encoder under CCSDS standard, which used time domain coding method. It analysed the principle of Reed-Solomon(RS) encode, the design of basic unit circuit, including Galois field adder and multiplier, and addressed the application method of parallel multiplier with constant coefficients under the natural base. This paper designed a RS (255,223) encoder with symmetric coefficients of generator polynomial under the QuartusⅡ5.0 environment. In addition, figured out the simulation results, and results of the output were correct by the test. The RS (255,223) encoder designed by this method not only effectively simplifies the control unit and has the regular modular structure, but also is easy for FPGA implementation and can be used in high-speed occasions.