基于时频分布的扩展的二元相移键控信号解调算法  

Analysis of EBPSK demodulation algorithm based on time-frequency distribution

作　　者：王红星[1] 王洪利[2] 毛忠阳[1] 

机构地区：[1]海军航空工程学院电子与信息工程系,山东烟台264001 [2]海军航空工程学院研究生管理大队,山东烟台264001

出　　处：《吉林大学学报（工学版）》2011年第5期1491-1496,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(60772056)

摘　　要：在已有的扩展二元相移键控(EBPSK)调制信号模型基础上,从非平稳信号分析方法入手,对EBPSK调制信号的时频分布特性进行了详细推导,建立了EBPSK信号相位跳变与时频分布幅度的关系模型,利用该模型提出了基于时频分布的EBPSK解调算法,并给出了相应的解调器结构。对基于时频分布的EBPSK信号解调器性能进行了分析,讨论了解调器的判决门限选取方法。分析表明,基于时频分布的EBPSK信号解调算法不但简化了EBPSK解调器结构,获得了优异的EBPSK调制系统差错性能,而且为通信信号的非平稳信号处理提供了新的可行方案。Base on existing Extended Binary Phase Shift Keying（EBPSK） signal model,the time-frequency characteristic of EBPSK was analyzed using nonstationary signal analysis method.A model of the relationship between phase discontinuity and the amplitude of time-frequency distribution of EBPSK signal was proposed.Using this model,a time-frequency distribution based EBPSK demodulation algorithm was developed,and the structure of the demodulator was given.The performance of the demodulation algorithm was analyzed,and the selection method of the judging threshold for the demodulator was explored.Simulation and theoretical analysis results demonstrated that the EBPSK demodulation algorithm not only simplifies the structure of the EBPSK demodulator and obtains good error-correction performance but also provides a new feasible scheme for nonstationary signal processing in communication.

关 键 词：通信技术 非平稳信号分析 时频分布 相位跳变频带 扩展的二元相移键控 

分 类 号：TN911[电子电信—通信与信息系统]