甚高频数据广播信号解调算法设计  

Demodulation algorithm design of VHF data broadcast signal

作　　者：张坤峰[1] 郭英[1] 张国祥[1] 赵阳 

机构地区：[1]空军工程大学信息与导航学院 [2]68078部队

出　　处：《计算机应用》2013年第10期2739-2741,2745,共4页journal of Computer Applications

基　　金：陕西省自然科学基金资助项目(2010JM8037)

摘　　要：为提高甚高频数据广播(VDB)信号的同步精度和解调性能,根据VDB信号基本格式和特点,提出了一种基于解差分的VDB信号的解调算法,该算法消除了频偏引起的同步性能恶化,能够在一组同步码元内完成帧同步、位同步和频偏估计与校正。仿真结果表明,该方法有效提升了VDB信号解调性能。In order to enhance the performance of the synchronization and demodulation, a Very high frequency （VHF） Data Broadcast （VDB） signal demodulation algorithm based on the solution of differential equation was proposed. This algorithm eliminated the synchronization performance deterioration caused by the frequency offset. And frame synchronization, bit synchronization, frequency offset estimation and correction could be completed within a single set of synchronization symbols. The simulation results show that the method is effective to enhance the VDB signal demodulation performance.

关 键 词：甚高频数据广播信号 解调 同步 频偏估计 

分 类 号：TN941.4[电子电信—信号与信息处理]