本文選題：信號(hào)處理　切入點(diǎn)：乘積型核函數(shù)　出處：《電子與信息學(xué)報(bào)》2014年11期

【摘要】：該文提出一種基于改進(jìn)乘積型核函數(shù)的二次調(diào)頻信號(hào)的參數(shù)估計(jì)方法。首先,對(duì)信號(hào)乘以自身的共軛反轉(zhuǎn)并做相位匹配變換,通過積累后信號(hào)最大值位置得到信號(hào)的調(diào)頻率估計(jì)值;然后,再補(bǔ)償?shù)粼盘?hào)的調(diào)頻率,對(duì)解調(diào)頻(dechirp)后的信號(hào)構(gòu)造新的乘積型核函數(shù),并變換到2維時(shí)間-時(shí)延域,沿時(shí)間和時(shí)延軸分別做相位匹配變換和傅里葉變換,在變換后的調(diào)頻率變化率-頻率平面通過最大值的位置即可同時(shí)得到調(diào)頻率變化率和中心頻率的估計(jì)值,對(duì)補(bǔ)償?shù)粝辔坏男盘?hào)取均值并求模得到幅度值,從而實(shí)現(xiàn)二次調(diào)頻信號(hào)的參數(shù)估計(jì)和重構(gòu)�？梢�,該方法避免了對(duì)所有相位參數(shù)的迭代搜索,提高了運(yùn)算效率。最后,對(duì)單分量和多分量二次調(diào)頻信號(hào)的仿真結(jié)果證明了該方法的有效性。
[Abstract]:In this paper, a parameter estimation method for QFM signal based on improved product kernel function is proposed. Firstly, the signal is multiplied by its own conjugate inversion and the phase matching transformation is performed. The estimation of the modulation frequency of the signal is obtained by the maximum position of the accumulated signal, and then the modulation frequency of the original signal is compensated, and a new product kernel function is constructed for the signal after the dechirp is untuned, and then converted to the two-dimensional time-delay domain. Phase matching transform and Fourier transform are made along the time and time delay axis respectively. The frequency change rate and the center frequency can be estimated at the same time when the frequency plane passes through the position of the maximum value. The average value of the signal compensating phase is taken and the amplitude value is obtained, so that the parameter estimation and reconstruction of the secondary frequency modulation signal are realized. It can be seen that this method avoids the iterative search of all phase parameters and improves the computational efficiency. The simulation results for single and multi-component secondary frequency modulation signals show the effectiveness of the proposed method.
【作者單位】： 西安電子科技大學(xué)雷達(dá)信號(hào)處理國防科技重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(61001211,61303035) 航空基金(20110181004) 中央高校基本科研業(yè)務(wù)費(fèi)(K5051202016)資助課題
【分類號(hào)】：TN911.23

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 邢孟道,保錚;外場實(shí)測數(shù)據(jù)的艦船目標(biāo)ISAR成像[J];電子與信息學(xué)報(bào);2001年12期

2 陳倩倩;徐剛;李亞超;邢孟道;保錚;;短孔徑ISAR方位定標(biāo)[J];電子與信息學(xué)報(bào);2013年08期

3 黃瑯，

本文編號(hào)：1691442