针对高动态环境下突发信号检测问题,提出基于高阶项逐级消去的非线性调频 (non-linear frequency modulation,NLFM) 信号参数估计算法,利用合理近似,将其转化为相对简单的线性调频 (linear frequency modulation,LFM) 信号参数估计问题,并提出两级调频率逼近法用于LFM信号参数估计,具有原理简明、计算复杂度低等特点,便于实际工程应用. 针对接收信号功率动态变化的问题,提出自适应快速傅里叶变换 (fast Fourier transform,FFT)峰均比门限信号检测算法. 仿真结果表明,所提算法能够在信噪比为-27dB的高动态环境下准确实现信号检测与参数估计
References
[1]
李一兵,岳欣,杨莘元.多重自相关函数在微弱正弦信号检测中的应用[J].哈尔滨工程大学学报,2004,25(8):525-528. Li Yibing,Yue Xin,Yang Xinyuan. Estimation of sinusoidal parameters in powerful noise by multi-layer autocorrelation[J]. Journal of Harbin Engineering University, 2004,25(8):525-528. (in Chinese)
[2]
冯文江,王红霞,侯剑辉, 等.一种适合突发通信的信号检测改进算法[J].重庆大学学报,2007,37(2):58-60. Feng Wenjiang, Wang Hongxia, Hou Jianhui, et al. Improved signal detecting algorithm for burst communication[J]. Journal of Chongqing University, 2007,37(2):58-60. (in Chinese)
[3]
吴玉成,陈宁,高珊.突发通信中的自适应门限信号检测方法[J].电子与信息学报,2007,29(12):2896-2898. Wu Yucheng, Chen Ning, Gao Shan. Adaptive threshold signal detection method for burst communication[J]. Journal of Electronics and Information Technology, 2007,29(12):2896-2898. (in Chinese)
[4]
尹治平,张义安,陈卫东,等.基于分数阶功率谱的LFM信号检测[J].系统工程与电子技术,2009,31(1):45-48. Yin Zhiping, Zhang Yi\'an, Chen Weidong, et al. LFM signal detection based on fractional power spectrum[J]. Systems Engineering and Electronics, 2009,31(1):45-48. (in Chinese)
[5]
司伟建,蒋鹏,刘旭波.改进的三次相位函数法LFM雷达信号参数估计[J].哈尔滨工程大学学报,2012,33(6):771-774. Si Weijian, Jiang Peng, Liu Xubo. The parameter estimation of an LFM radar signal based on a modified cubic phase function[J]. Journal of Harbin Engineering University, 2012,33(6):771-774. (in Chinese)
[6]
韩孟飞,王永庆,吴嗣亮,等.一种低信噪比下LFM信号参数快速估计算法[J].北京理工大学学报,2009,29(2):147-151. Han Mengfei, Wang Yongqing, Wu Siliang, et al. A fast algorithm on parameter estimation of LFM signals under low SNR[J]. Transactions of Beijing Institute of Technology, 2009,29(2):147-151. (in Chinese)
[7]
Djuric P M, Kay S M. Parameter estimation of chirp signals[J]. IEEE Transactions on Acoustics,Speech and Signal Processing, 1990,38(12):2118-2126.
[8]
Niczyporuk W. LFM radar signal detection in the joint time-frequency domain[C]//Proceedings of Signal Processing Algorithms, Architectures, Arrangements and Applications. Poznan. Poland: [s.n.], 2007:33-37.
[9]
杜东平,唐斌,孙闽红.基于ERWT的NLFM信号检测及参数估计[J].电子学报,2007,35(12):2367-2370. Du Dongping, Tang Bin, Sun Minghong. NLFM signal detection and parameter estimation based on ERWT[J]. Acta Electranica Sinica, 2007,35(12):2367-2370. (in Chinese)
