基于DSP的LFM脉冲引信信号模糊函数计算及参数提取研究  

Calculation of LFM pulse fuze signal ’ s ambiguity function and its parameters extraction based on DSP

作　　者：陈思[1] 赵惠昌[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《南京理工大学学报》2013年第1期70-75,共6页Journal of Nanjing University of Science and Technology

基　　金：国家部委基金(9140A05040510BQ0201)

摘　　要：为了提高引信干扰机的干扰性能,该文提出了一种基于模糊函数的线性调频脉冲引信信号参数提取以及利用数字信号处理器实现的方法。该方法首先对接收的信号进行二维自相关变换,即计算信号的模糊函数,然后结合信号本身的特性,在相关域提取信号的调制参数,最后通过美国德州仪器公司的数字信号处理器TMS320C6416芯片对该方法进行硬件实现。仿真结果表明该方法不依赖任何先验信息,即能有效地提取出信号的调制参数,且具有良好的抗噪声性能,测试结果验证了系统具有高的可靠性和实时性。To improve the jamming performance of a fuze jammer,this paper proposes a method of linear frequency modulation pulse fuze signal ’ s parameters extraction based on ambiguity function and its implementation by digital signal processor.Firstly,two-dimensional autocorrelation transformation is done for the received signal,namely calculating the signal ’ s ambiguity function,then according to the characteristics of signal itself,the modulation parameters are extracted by ambiguity function.The whole system is based on TMS320-C6416 chip produced by Texas Instruments.The simulation results show that the method which needs no prior information can not only extract the parameters effectively and accurately,but also have a good anti-noise performance.The test results prove that the system has high reliability and real-time performance.

关 键 词：引信 线性调频脉冲信号 模糊函数 数字信号处理器 

分 类 号：TJ434.1[兵器科学与技术—火炮、自动武器与弹药工程]