一种易于硬件实现的LZW算法的应用

Application of an easy LZW algorithm for hardware implementation

实测表明,遥测系统传输的数据冗余度高达90%,这严重降低了遥测系统的工作性能,而目前还没有针对遥测数据硬件压缩系统而设定的数据无损压缩的统一标准。为了实现遥测数据硬件系统的无损压缩,通过适当增加字典的分配空间,优化LZW算法的查找方式,改进LZW算法的字典更新方法,调试出了一种易于硬件实现的LZW算法。最终,通过软件仿真及实际测试,结果表明,遥测数据压缩比达1.8:1以上,完成了设计的预期目标。

Test shows that the data redundancy of telemetry system transmission is up to 90%. This seriously reduces the per- formance of the telemetry system, but there is no uniform standard of lossless data compression set for telemetry data compression hardware system. In order to achieve the lossless compression of telemetry data for hardware system, an easy hardware implementa- tion of LZW is achieved through increasing the allocated space of dictionary, optimizing the finding way of LZW, improving the dictionary update method of LZW algorithm. Finally, through software simulation and practical, test results shows that the ratio of telemetry data compression is more than 1.8：1, completing the target design.