计算机工程与应用2012，Vol.48Issue(3)：153-155,3.DOI:10.3778/j.issn.1002-8331.2012.03.045
低信噪比下跳频信号参数盲估计
Blind parameter estimation of frequency-hopping signals under low SNR condition
齐昶 1王斌1
作者信息
- 1. 信息工程大学信息工程学院,郑州450002
- 折叠
摘要
Abstract
Ainuning at the actual application of communcation countermeasures, a method for the hop rate accurate estimation is proposed for the Frequency Hopping (FH) signals. A new time-frequency analysis method, short-time Fourier (STFT) and Modified Smoothed Pesudo WVD(MSPWD) synthesis is proposed, which can obtain robust results with good time-frequency concentration and suppression cross-term interference performance. The peaks of time-equeney distribution are detected based on 2-D(two-dimensional) quadratic diference method. Frequency-hopping signals hop rat estimate can be obtained through FFT method and adaptivet threshold method cost function method. The simulations show that the estimation of hop rate is efficient even if the SNR is low. When low hop rate, FFT method is best; when high hop rate, cost function method is best.关键词
跳频/时频分析/参数盲估计Key words
frequency hopping/ time-frequency analysis/ parameter blind estimation分类
信息技术与安全科学引用本文复制引用
齐昶,王斌..低信噪比下跳频信号参数盲估计[J].计算机工程与应用,2012,48(3):153-155,3.
