摘要
基于非平稳信号分析方法,对时相调制(Time-Phase Modulation,TPM)信号的时频分布特性进行了详细分析,建立了TPM调制信号相位突变与时频分布幅度的映射关系,利用该映射提出了一种基于非平稳信号分析的TPM调制信号解调算法,并对该解调算法性能进行了理论分析,讨论了最佳判决门限选取方法,仿真结果验证了理论分析的正确性。理论分析及仿真表明,基于非平稳信号分析的TPM调制信号解调算法获得了优于传统的相关解调的调制系统差错性能。
In this paper, the property of time-frequency distribution for time-phase modulation （TPM） signal was analyzed based on non-stationary signal analyzing method. The mapping model between phase mutation and amplitude of time-frequency distribution for TPM signal was proposed, and by using this model, a demodulation algorithm for TPM based on non-stationary signal analyzing was presented. Furthermore, the performance of the demodulation algorithm was analyzed and the problem about the choice of optimum decision limens was discussed. The validity of the theoretical analysis was proved by simulation result. The results of theory and simulation showed that the demodulation algorithm provided by this paper not only could offer good error performance for TPM system, but also could bring a new valuable method for communication signal processing based on non-stationary theory.
出处
《海军航空工程学院学报》
2012年第5期525-529,共5页
Journal of Naval Aeronautical and Astronautical University
基金
国家自然科学基金资助项目(60772056)
山东省"泰山学者"建设工程专项基金资助项目
关键词
频带利用率
时相调制
相位突变
非平稳信号
时频分布
band efficiency
time-phase modulation
phase mutation
non-stationary signals
time-frequencydistribution
