摘要
从信号发射波形出发,分析了一种由FSK信号和PSK信号组合而成的新型FSK/PSK信号。首先构造了信号的模型,参考二相编码和频率编码的模糊函数详细推导了其模糊函数公式,通过数值仿真得到了模糊图,然后从距离速度分辨力、测距测速精度、截获性能等方面对其进行了分析。理论和仿真分析结果表明,这种新型FSK/PSK信号也具有图钉型模糊图,具有良好的分辨力与测距测速性能,低截获性能也相对于单一FSK信号或相位编码信号有了较大提高,因此具有较好的应用前景。
A new FSK/PSK radar signal obtained by combining frequency- shift keying（FSK） signals with phase- shift keying（PSK） signals is discussed. First,the signal model is constructed, and ambiguity function expression of FSK/PSK radar signal is given based on binary phase- coded signals and frequency- coded signal. According to the numeric simulation, the ambiguity plots and two- dimensional distance and speed plots can be found. Then the performance of resolution, measuring precision and the intercept factor are discussed. The theoretical analysis and simulation result show that the hybrid signal has better ambiguity properties and distance and velocity resolution. Also it has favorable ranging and velocity measuring precision and the intercept factor. So it has wide application in the future.
出处
《电讯技术》
北大核心
2009年第8期49-53,共5页
Telecommunication Engineering
关键词
雷达信号
信号分析
FSK/PSK
模糊函数
低截获
测量精度
radar signal
signal analysis
FSK/PSK
ambiguity function
low probability of interception （LPI）
measuring precision
