采用非對(duì)角1-D切片的碼片速率盲估計(jì)
發(fā)布時(shí)間:2018-12-05 15:20
【摘要】:在通信偵察識(shí)別中,通信信號(hào)的碼元速率估計(jì)是調(diào)制識(shí)別和信息解調(diào)的前提和基礎(chǔ)。針對(duì)直接序列擴(kuò)頻信號(hào)的偽碼碼片速率估計(jì)問(wèn)題,提出了一種利用聯(lián)合循環(huán)高階累積量非對(duì)角1-D切片特征參數(shù),對(duì)直擴(kuò)信號(hào)碼片速率進(jìn)行盲估計(jì)的改進(jìn)算法。該算法將采樣信號(hào)不同延時(shí)的非對(duì)角1-D切片進(jìn)行聯(lián)合處理,通過(guò)自相關(guān)、快速傅里葉變換、求模平方等方法,增強(qiáng)了譜線特征。仿真實(shí)驗(yàn)證明,改進(jìn)算法較2-D切片算法簡(jiǎn)化了計(jì)算,并且在更低信噪比條件下,實(shí)現(xiàn)了對(duì)無(wú)先驗(yàn)信息直接序列擴(kuò)頻信號(hào)的碼片速率盲估計(jì)。
[Abstract]:In communication reconnaissance recognition, the symbol rate estimation of communication signal is the premise and foundation of modulation recognition and information demodulation. In order to solve the problem of PN code chip rate estimation for direct sequence spread spectrum signals, an improved algorithm for blind estimation of direct sequence spread spectrum (DSSS) signal chip rate is proposed, which utilizes the combined cyclic high order cumulant nondiagonal 1-D slice characteristic parameters. In this algorithm, the non-diagonal 1-D slices with different time delays are processed jointly, and the spectral line features are enhanced by autocorrelation, fast Fourier transform and modulus squared. The simulation results show that the improved algorithm simplifies the calculation compared with the 2-D slice algorithm and realizes blind chip rate estimation for the spread spectrum signals without prior information under lower SNR.
【作者單位】: 總參第54研究所;海軍航空工程學(xué)院電子信息工程系;中國(guó)人民解放軍第92677部隊(duì);
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(61102167)
【分類(lèi)號(hào)】:TN971
本文編號(hào):2365262
[Abstract]:In communication reconnaissance recognition, the symbol rate estimation of communication signal is the premise and foundation of modulation recognition and information demodulation. In order to solve the problem of PN code chip rate estimation for direct sequence spread spectrum signals, an improved algorithm for blind estimation of direct sequence spread spectrum (DSSS) signal chip rate is proposed, which utilizes the combined cyclic high order cumulant nondiagonal 1-D slice characteristic parameters. In this algorithm, the non-diagonal 1-D slices with different time delays are processed jointly, and the spectral line features are enhanced by autocorrelation, fast Fourier transform and modulus squared. The simulation results show that the improved algorithm simplifies the calculation compared with the 2-D slice algorithm and realizes blind chip rate estimation for the spread spectrum signals without prior information under lower SNR.
【作者單位】: 總參第54研究所;海軍航空工程學(xué)院電子信息工程系;中國(guó)人民解放軍第92677部隊(duì);
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(61102167)
【分類(lèi)號(hào)】:TN971
【二級(jí)參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 紀(jì)勇,徐佩霞;基于小波變換的數(shù)字信號(hào)符號(hào)率估計(jì)[J];電路與系統(tǒng)學(xué)報(bào);2003年01期
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