[1]潘 龙 晋良念.超宽带穿墙雷达压缩感知成像中 chipping 序列的设计[J].大众科技,2014,16(04):12-16.
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超宽带穿墙雷达压缩感知成像中 chipping 序列的设计
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《大众科技》[ISSN:1008-1151/CN:45-1235/N]

卷:
第16卷
期数:
2014年04期
页码:
12-16
栏目:
信息技术与通信
出版日期:
2014-12-24

文章信息/Info

Title:
Design of chipping sequence of UWB through-the-wall radar imaging with compressed sensing
文章编号:
1008-1151(2014)04-0012-05
作者:
潘 龙 晋良念
（桂林电子科技大学信息与通信学院，广西 桂林 541004）
关键词:
超宽带穿墙雷达; 压缩感知; chipping 序列; 功率谱匹配
Keywords:
UWB through wall radar;  compressed sensing;  chipping sequence;  power spectrum matching
分类号:
TN95
文献标志码:
A
摘要:
在超宽带穿墙雷达压缩感知成像中，常常使用 Rademacher 序列作为模拟信息转换器的 chipping 序列。而这种序 列的功率谱类似于高斯白噪声的功率谱，它与回波信号的功率谱不匹配，导致低速采样前信号的信噪比偏低，最终影响了成像 效果。文章从低速采样前的平均信噪比最大化入手，构建设计匹配 chipping 序列的优化算法以导出其成立的条件，给出一种使 用马尔科夫链游程长度受限（RLL）序列来设计匹配 chipping 序列的解决方案。仿真结果表明，使用马尔科夫链 RLL 序列设计 匹配 chipping 序列的成像结果优于 Rademacher 序列，其图像的信噪比提高 2～3dB
Abstract:
In the UWB through-the-wall radar imaging with compressed sensing, The Rademacher sequence is the chipping sequence of Analog-to-Information Conversion (AIC) in general. Its power spectrum is similar to the power spectrum of Gauss white noise, and mismatched with the power spectrum of receive signal. This will lead to a decrease in SNR before sampling at low speed, and then reduce the imaging quality. In this paper, a kind of sequence that the power spectrum is matched with the power spectral of received signal is designed from maximum of the signal to noise ratio before sampling at low speed. In addition, we show a design scheme of matching chipping sequence that is a Markov-generated Run-Length Limited (RLL) sequence. The results of simulations show that the through-the-wall imaging performance with the proposed sequence is better than traditional Rademacher sequence actually, and the signal-to-noise ratio of imaging improves about from 2dB to 3dB.

参考文献/References:

[1] LIU Quan-hua,WANG Ya-zhou. Towards low cost,high speed data sampling module for multifunctional Real-Time UWB radar[J]. IEEE Transactions on Aerospace and - 16 - Electronic Systems,2013, 49(2): 1301-1316. [2] 晋良念,欧阳缮,周丽军.UWB MIMO 穿墙雷达的阵列设 计和成像方法[J].电子与信息学报,2012,34(7):1574-1580. [3] 介利军,欧阳缮,杨洁,等.超宽带穿墙雷达成像技术研究 [J].现代雷达,2012,34(5):35-39. [4] 杨峰,胡剑浩,李少谦.基于欠奈奎斯特采样的超宽带信号 总体最小二乘重建算法[J].电子与信息学报,2010,32(6): 1418-1422. [5] ZHANG Wen-ji, MOENESS G, Amin, et al. Ultrawideband impulse radar Through-the-Wall imaging with compressive sensing[J].International Journal of Antennas and Propagation,2012, 1:1-10. [6] R SOLIMENE F A, SOLDOVIERI F. A novel CS-TSVD strategy to perform data reduction in linear inverse scattering problems[J]. IEEE Geoscience and Remote Sensing Letters, 2012, 9(5): 881-885. [7] M MANGIA R R, SETTI G. Analog-to-information conversion of sparse and non-white signals:statistical design of sensing waveforms[J].Proc.IEEE ISCAS,May, 2011. [8] M MANGIA R R, SETTI G. Rakeness in the design of analog-to-information conversion of sparse and localized signals[J].IEEE Transactions on Circuits and Systems-I:Regular Paper, 2012, 59(5): 1001-1013. [9] CHEN X, YU Z,HOYOS S, et al. A sub-nyquist rate sampling receivers expoliting compressive sensing signals[J].IEEE Transactions on Cirtuits Systems-I,Reg.Papers,2011, 58(3): 507 - 522. [10] A HARMS W U, CALDERBANK R. A constrained random demodulator for sub-nyquist sampling[J].IEEE Transactions on Signal Processing, 2013,61(3):707-723.

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备注/Memo

备注/Memo:
【收稿日期】2014-03-13 【基金项目】国家自然科学基金（61371186），广西自然科学基金（2013GXNSFFA019004、2013GXNSFAA019329）。 【作者简介】潘龙（1988－），男，桂林电子科技大学信息与通信学院硕士生，研究方向为超宽带穿墙雷达压缩感知成像方 法；晋良念（1974－），男，桂林电子科技大学信息与通信学院副教授，博士，研究方向为超宽带雷达目标检测与成像。
更新日期/Last Update: 1900-01-01