一種新的時分多址信號射頻特征及其在特定輻射源識別中的應(yīng)用

潘一葦; 彭華; 李天昀; 王文雅

doi:10.11999/JEIT190163

一種新的時分多址信號射頻特征及其在特定輻射源識別中的應(yīng)用

doi: 10.11999/JEIT190163

戰(zhàn)略支援部隊信息工程大學(xué)信息系統(tǒng)工程學(xué)院鄭州 450001

基金項目: 國家自然科學(xué)基金(61401511, U1736107)

詳細(xì)信息

作者簡介:
潘一葦：男，1990年生，博士生，研究方向為通信信號處理、特定輻射源識別

彭華：男，1973年生，教授，研究方向為通信信號處理、軟件無線電

李天昀：男，1979年生，副教授，研究方向為通信信號處理、軟件無線電

王文雅：女，1991年生，碩士生，研究方向為通信信號處理、可見光通信

通訊作者:
潘一葦　novakd@163.com

中圖分類號: TN911.7
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- 文章訪問數(shù): 4067
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2019-03-20
- 修回日期: 2019-06-05
- 網(wǎng)絡(luò)出版日期: 2019-06-14
- 刊出日期: 2019-11-01

A Novel Radiometric Signature of Time-Division Multiple Access Signals and Its Application to Specific Emitter Identification

Institute of Information System Engineering, Information Engineering University, Zhengzhou 450001, China

Funds: The National Natural Science Foundation of China (61401511, U1736107)

摘要

摘要: 時分多址(TDMA)信號特定輻射源識別(SEI)的性能主要受限于突發(fā)數(shù)據(jù)的長度。為此，該文提出一種新的射頻特征，從載波相位上揭示了相鄰時隙的用戶是否相同，為相同用戶的數(shù)據(jù)累積提供了依據(jù)。該文首先分析了特征的產(chǎn)生機理，并給出了提取方法；根據(jù)特征的統(tǒng)計特性，推導(dǎo)了自適應(yīng)的判決門限，實現(xiàn)了相鄰時隙用戶身份的檢測；在此基礎(chǔ)上，設(shè)計了新的SEI處理流程，通過數(shù)據(jù)累積打破了每個時隙單獨識別的傳統(tǒng)思維。實驗結(jié)果表明：該特征對噪聲具備良好的魯棒性，能夠?qū)崿F(xiàn)相鄰時隙用戶身份的準(zhǔn)確檢測；與傳統(tǒng)做法相比，新的處理流程能夠有效改善TDMA信號SEI的性能。
- 特定輻射源識別 /
- 時分多址信號 /
- 射頻特征 /
- 載波相位連續(xù)性
Abstract: For Time-Division Multiple Access (TDMA) signals, the performance of Specific Emitter Identification (SEI) is primarily limited by burst duration. To remedy this shortcoming, a novel radiometric signature is presented, which reveals whether the users of the adjacent time slots are the same from a perspective of carrier phase, thereby providing the basis for data accumulation of the same user. First, the feature mechanism is introduced, as well as the extraction method. Thereafter, user identity detection of the adjacent slots is implemented with an adaptive threshold, which is derived from the distribution of the signature. Finally, a new SEI processing procedure is designed with data accumulation, which breaks the routine of identifying only one slot at a time. Simulation results demonstrate that the proposed signature is resilient against the noise, and can accurately detect the user identity of the adjacent slots. Compared with the traditional processing procedure, the proposed one can effectively improve the SEI performance of TDMA signals.
- Specific Emitter Identification (SEI) /
- Time-Division Multiple Access (TDMA) signals /
- Radiometric signature /
- Continuity of carrier phase

HTML全文

圖 1 TDMA突發(fā)數(shù)據(jù)結(jié)構(gòu)

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圖 2 直接變頻發(fā)射機的典型結(jié)構(gòu)

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圖 3 傳統(tǒng)的TDMA信號SEI處理流程

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圖 4 根據(jù)一段實際信號計算得到的升序向量

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圖 5 新的TDMA信號SEI處理流程

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圖 6 不同判決門限下的檢測正確率

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圖 7 不同信噪比下的漏檢概率和虛檢概率

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圖 8 不同信噪比下有/無數(shù)據(jù)累積的識別正確率

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圖 9 不同觀測時長對算法性能的影響

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表 1 不同信噪比下的檢測性能

信噪比 ${{{E_S}} / {{N_0}}}$ (dB)	判決門限 $\gamma$	檢測概率 ${P_{\rmq7j3ldu95}}$ (%)	檢測正確率 ${P_{\rm{c}}}$ (%)
10	0.0582	99.6723	97.2490
12	0.0467	99.6969	97.6732
14	0.0386	99.7077	98.0256
16	0.0336	99.7108	98.2951
18	0.0304	99.7369	98.4334
20	0.0285	99.7431	98.5184
22	0.0273	99.8092	98.6035
24	0.0266	99.8215	98.6404

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