基于群变换的BCH码在VWDK系统中的研究  

A Study on BCH Codes Based on the Group Change in the VWDK System

作　　者：唐燕[1] 殷奎喜[2] 

机构地区：[1]南京师范大学泰州学院应用物理系,江苏泰州225300 [2]南京师范大学物理科学与技术学院,江苏南京210097

出　　处：《金陵科技学院学报》2009年第2期27-30,共4页Journal of Jinling Institute of Technology

基　　金：地理信息科学江苏省重点实验室开放基金资助(JK20050304)

摘　　要：VWDK调制具有很好的窄带性质和低的误码率,依据国家对系统占用带宽的定义,首先估算系统带宽;其次考虑超窄带调制的实质是利用了载波相位的差异,而FIR滤波器无法较好的保持线性相位,引入了一种特殊的IIR滤波器;最后,在信道编码上,使用基于群变换的BCH码。数值实验表明在保证10-5误码率的前提下,信噪比降低5分贝。It is proved that the VWDK modulations are narrowband and have low error rate. According to the state regulations on communication bandwidth, the system bandwidth is estimated firstly. Then the differences of carrier phase are used in the UNB modulations and a special IIR filter is introduced, for the FIR filter can＇ t keep linear phase. At lastly, the group change BCH codes are used in the channel error codes. The simulation indicates that SNR has reduced 5 DB in order to ensure the error rate below 10^-5.

关 键 词：VWDK调制 滤波器 BCH码 误码率 

分 类 号：TN919.6[电子电信—通信与信息系统]