一种支持任意码率的高斯低通滤波器设计  

Design of a Gaussian low pass filter with arbitrary bit rate

作　　者：王仁智 孔雅 张春泽 Wang Renzhi;Kong Ya;Zhang Chunze(Tianjin Xunlian Technology Co.,Ltd.,Tianjin 300308,China)

机构地区：[1]天津讯联科技有限公司,天津300308

出　　处：《电子技术应用》2021年第7期61-63,68,共4页Application of Electronic Technique

摘　　要：GMSK(高斯最小偏移键控)调制技术具有较高的频谱调制效率,适用于航空航天高码率遥测领域。高斯低通滤波器是GMSK调制技术的关键单元。介绍了高斯低通滤波器的设计原理,通过采用LUT查表法和异或运算的方法在Xilinx的FPGA中实现了一种支持任意码率、低资源消耗的高斯低通滤波器。对仿真和实现结果进行分析,该滤波器在未使用DSP48E1s资源和较少的LUT资源条件下实现了任意码率切换功能。GMSK(Gaussian filtered minimum shift keying)modulation technology has high spectrum modulation efficiency,which is suitable for aerospace high bit rate telemetry.Gaussian low pass filter is the key unit of GMSK modulation technology.The design principle of Gaussian low pass filter was introduced,a Gaussian low-pass filter with arbitrary bit rate and low resource consumption was implemented in Xilinx FPGA,with LUT look-up table method and XOR operation used.Arbitrary rate switching function was achieved without using DSP48E1s resources and less LUT resources through the simulation and implementation results.

关 键 词：FPGA GMSK 低通滤波器 遥测 

分 类 号：TN911.3[电子电信—通信与信息系统]