摘要
针对传统算法在进行伪码-线性调频信号参数提取时存在的条件限制和在低信噪比下提取精度不高的问题,提出了一种利用多相滤波器组和高阶累积量相结合进行参数的提取方法,该方法能够完成伪码-线性调频信号(PRBC-LFM)参数在高斯噪声下的提取。首先通过多相滤波器组能快速完成信号在频域上的均匀划分,接着对子带信号进行三阶累积量的短时估计,从而达到了抑制高斯噪声和实现在低信噪比下进行信号参数的提取的目的。测试结果表明,在低信噪比下使用该方法进行参数估计时精度很高。
During the pseudo-code for the traditional algorithm-linear FM （Frequency Modulation）signal parameter extraction conditions and extraction accuracy is not high in the low signal-to-noise ratio, a pseudo-code-LFM Signal in Gaussian noise to extract new methods is proposed. The method utilizes a polyphase filter bank and the higher- order cumulants combination of the parameters of the extraction, first polyphase filter bank can quickly complete the uniform division of the signal in the frequency domain, followed by a sub-band signal to conduct a third-order eumulant of the short-term estimates, so as to achieve the purpose of suppression of Gaussian noise and low signal-tonoise ratio of signal parameters extracted. The test results show that the high precision when using this method to estimate the parameters in the low signal-to-noise ratio.
出处
《电子器件》
CAS
北大核心
2017年第1期108-112,共5页
Chinese Journal of Electron Devices
基金
江西省教育厅科技计划项目(GJJ14869)
关键词
信息处理
参数提取
多相滤波器
三阶累积量
线性调频
高斯噪声
低信噪比
information processing
Parameter extraction
poly-phase fiher
third-order accumulation
linear frequencymodulation（LFM）
Gaussian noise
low signal to noise ratio
