基于循環(huán)前綴的相位編碼OFDM雷達(dá)多普勒頻移估計(jì)和補(bǔ)償

趙晶晶; 霍凱; 劉永祥; 楊小琪

doi:10.11999/JEIT160549

基于循環(huán)前綴的相位編碼OFDM雷達(dá)多普勒頻移估計(jì)和補(bǔ)償

doi: 10.11999/JEIT160549 cstr: 32379.14.JEIT160549

基金項(xiàng)目:

國家自然科學(xué)基金(61501481, 61422114)，湖南省杰出青年基金(2015JJ1003)

計(jì)量
- 文章訪問數(shù): 1746
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-05-28
- 修回日期: 2016-12-13
- 刊出日期: 2017-04-19

Cyclic Prefix Based Phase-coded OFDM Radar Doppler Offset Estimation and Compensation

Funds:

The National Natural Science Fundation of China (61501481, 61422114), The Natural Science Fundation for Distinguished Yong Scholars of Hunan Province (2015JJ1003)

摘要

摘要: 相位編碼正交頻分復(fù)用(PC-OFDM)雷達(dá)是近年來新體制雷達(dá)研究熱點(diǎn)之一。該雷達(dá)信號對正交多載頻進(jìn)行相位調(diào)制，同時(shí)具有距離、多普勒高分辨。然而，PC-OFDM雷達(dá)對多普勒頻偏較為敏感，該文研究了PC-OFDM雷達(dá)基于循環(huán)前綴(CP)對多普勒頻偏進(jìn)行估計(jì)，并基于估計(jì)值對頻偏進(jìn)行補(bǔ)償，再進(jìn)行脈沖壓縮。仿真實(shí)驗(yàn)證明，該文方法能有效改善多普勒頻偏所帶來的1維距離像結(jié)構(gòu)破壞和旁瓣抬升。
- 相位編碼OFDM雷達(dá) /
- 多載頻 /
- 多普勒頻偏估計(jì) /
- 循環(huán)前綴
Abstract: Phase-Coded Orthogonal Frequency Division Multiplexing (PC-OFDM) radar has drawn wide attention in high resolution radar application. This kind of radar signal transmits orthogonal sub-carriers phase-modulated by specific sequences and has range and Doppler high resolution at the same time. Considering its sensitivity to Doppler offset, this paper derives the pulse compression method of PC-OFDM radar, and based on Cyclic Prefix (CP), a Doppler offset estimation and compensation algorithm is proposed. Several simulations verify the effectiveness of the method in improving High Resolution Range Profile (HRRP) with Doppler offset.
- Phase-coded OFDM radar /
- Multi-carrier /
- Doppler offset estimation /
- Cyclic prefix

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參考文獻(xiàn)(21)

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