摘要
由于短波频段信号种类众多、特征各不相同、参数各有变化,时变非恒参信道对信号侦察产生较大影响,因此短波信号分析面临有一定难度的问题。基于这一实际问题,提出了多分辨率分析方法,即对不同信号采用适合信号特点的分辨率下进行信号分析,对采集外界的短波2FSK、8FSK、多音并行PSK及话音等信号在多种分辨率下的信号特征呈现进行了比较,得到了每个信号的最佳分辨率,仿真结果表明,每种信号适用于信号分析的最佳分辨率各不相同,而且与信号特征参数密切相关。
A variety of HF signals are joining in the electro-magnetic atmosphere,and the characteristics of these signals are sophisticated with different features and parameters. The unsteady inhomogeneous and dynamic environment,accompanied by random changes of transmission properties exacerbates the challenges of HF radio analysis. A design of multi-resolution analysis for signals is proposed for solving the problem. A certain proper resolution for a signal is introduced according to its characteristics and parameter values.Simulations for HF,2FSK,8FSK,parallel multi-tone PSK and voice signals under the circumstance are performed,the obtained signal features are compared,and the most proper resolution for each signal is found,which validate that each signal has a different proper resolution and that the resolutions are closely related to the signals’ parameters.
作者
吴玲玲
谢华军
张润生
WU Ling-ling XIE Hua-jun ZHANG Run-sheng(Equipment Engineering Technology Research Laboratory, Shijiazhuang Hebei 050081, China The 54th Research Institute of CETC, Shijiazhuang Hebei 050081, China Unit 75775, PLA, Guangzhou Guangdong 510010, China)
出处
《无线电通信技术》
2017年第2期29-32,共4页
Radio Communications Technology
基金
国家自然科学基金项目(81370038)
关键词
多分辨率
短波信号
并行多音
multi-resolution
HF signals
parallel multi-tone
