采樣速率偏差對數(shù)字電視外輻射源雷達性能影響研究

萬顯榮; 程熠瑤; 易建新; 張勛

doi:10.11999/JEIT170152

采樣速率偏差對數(shù)字電視外輻射源雷達性能影響研究

doi: 10.11999/JEIT170152

基金項目:

國家重點研發(fā)計劃(2016YFB0502403)，國家自然科學基金(61331012, 61371197, U1333106, 61271400)，湖北省科技廳項目(2015BCE075, 2016CFA061)，博士后創(chuàng)新人才支持計劃(BX201600117)

計量
- 文章訪問數(shù): 1252
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2017-02-24
- 修回日期: 2017-05-23
- 刊出日期: 2017-10-19

Impact of Sampling Frequency Offset on Performance of Passive Radar Using Digital TV Signals

Funds:

The National Key Research and Development Program (2016YFB0502403), The National Natural Science Foundation of China (61331012, 61371197, U1333106, 61271400), The Science and Technology Division Project of Hubei Province (2015BCE075, 2016CFA061), Postdoctoral Innovation Talent Support Program (BX201600117)

摘要

摘要: 外輻射源雷達利用非合作照射源信號探測目標，參考信號提純和監(jiān)測信號雜波抑制是實現(xiàn)目標信號檢測的關(guān)鍵。該文針對數(shù)字電視外輻射源雷達接收系統(tǒng)中存在的采樣速率偏差問題，首先建立信號模型，從理論上分析了采樣速率偏差對參考信號重構(gòu)性能的影響，然后探討了采樣速率偏差對時域雜波抑制和相關(guān)匹配接收的影響。仿真結(jié)果說明存在采樣速率偏差時，提高接收端采樣速率可以降低參考信號的重構(gòu)誤碼率；不同的時域雜波抑制算法對采樣速率偏差的表現(xiàn)不同；采樣速率偏差對時域雜波抑制的影響較大，對相關(guān)匹配接收的影響較小。實測數(shù)據(jù)處理驗證了上述結(jié)論的正確性，為提高數(shù)字電視外輻射源雷達的目標探測性能提供了理論依據(jù)。
- 外輻射源雷達 /
- 采樣速率偏差 /
- 參考信號重構(gòu) /
- 雜波抑制
Abstract: Passive radar makes full use of non-cooperative illumination source to detect targets. Reference signal purification and clutter suppression of the surveillance signal are two key steps to achieve target signal detection. To solve the problem of the sampling frequency offset in digital TV based passive radar, the signal model is first established, and the impact of the sampling frequency offset on the performance of the reference signal reconstruction is analyzed. Then how the sampling frequency offset affects the clutter suppression and the target correlation matching is mainly investigated. The simulation results show that improving the sampling frequency can reduce the symbol error rate of the reconstructed signal. Different temporal clutter suppression algorithms perform differently under the existence of sampling frequency offset. The sampling frequency offset has a greater impact on the temporal clutter rejection performance and less effect on correlation matching. Finally, the analysis results are verified by the measurement data, which also provide theoretical basis on improving the target detection performance of digital TV based passive radar.
- Passive radar /
- Sampling frequency offset /
- Reference signal reconstruction /
- Clutter suppression

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參考文獻(24)

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