不同周期载频调制二进制编码激励脉冲压缩仿真研究
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摘要
本文为将编码技术引入地震探测中,在分析编码激励基本原理的基础上,开展了编码激励的数值模拟研究,掌握编码激励的规律和特点。通过激励编码信号的调制发射,对接收信号进行脉冲压缩的仿真研究。其次通过单位码元载有1至5个载频周期个数的13位Barker码调制信号激励换能器(通过发射载有1至5个载频周期的13位Barker码调制信号来激励换能器),对接收信号进行脉冲压缩仿真研究和频谱分析,分析了换能器性能对编码激励信号及其脉冲压缩结果的影响。
In order to introduce the digital encoded technology to the seismic detection,the author studied coded excitation digital simulation and grasped the rules and characters of coded excitation,which is based on the basic coded excitation principle.By modulation launching of coded excitation signal,the author also did simulation research on pulse compression of received signal.Furthermore,the author processed pulse compression with 13 bit signal excitation transducer with one to five units code element(by launching of 13 bit signal excitation transducer with one to five units code element).The author did the power spectrum analyses and analyzed the influence on different excitation signal and its pulse compression result by transducer.
In order to introduce the digital encoded technology to the seismic detection,the author studied coded excitation digital simulation and grasped the rules and characters of coded excitation,which is based on the basic coded excitation principle.By modulation launching of coded excitation signal,the author also did simulation research on pulse compression of received signal.Furthermore,the author processed pulse compression with 13 bit signal excitation transducer with one to five units code element(by launching of 13 bit signal excitation transducer with one to five units code element).The author did the power spectrum analyses and analyzed the influence on different excitation signal and its pulse compression result by transducer.
引文
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[18]张碧星,陆铭慧.用时间反转法在水下波导介质中实现自适应聚焦的研究[J].声学学报,2002,27(6):541-548.Zhang BX,Lu MH.Study of self-focusing in underwater waveguide by time reversal method[J].Acta Acustica,2002,27(6):541-548.
[19]张群逸.雷达中的相位编码信号与处理[J].火控雷达技术,2005,34:29-32.Zhang QY.Phase code signal processing of radar[J].Fire Control Radar Technology,2005,34:29-32.
[20]马庆云,杨辉.激励脉冲宽度对超声发射能量的影响[J].矿业研究与开发,2000,20(5):38-40.Ma QY,Yang H.The influence of drive impulse width in ultrasonic emitting energy[J].Mining Research and Development,2000,20(5):38-40.
[2]刘波.基于脉冲压缩与二相编码激励的超声检测提高信噪比研究[D].西安:陕西师范大学硕士论文,2011.Liu B.Research on SNR improvement in ultrasonic detection based on pulse compression and bi-phase coded excitation[D].Xian:Shanxi Normal University,Master’s thesis,2011.
[3]Nowicki A,Secomski W,Trots I,et al.Extending penetration depth using coded ultrasonography[J].Bulletin of the Polish Academy of Sciences Technical Sciences,2004,52(3):215-220.
[4]赵珩,高上凯.超声二进制编码激励血流测量的实验研究[J].中国生物医学工程学报,2007,26(1):12-18.Zhao H,Gao SK.An experimental study on ultrasound flow measurement based on binary coded excitation[J].Chinese Journal of Biomedical Engineering,2007,26(1):12-18.
[5]Ihor T,Andrzej Nowicki.Transducer bandwidth influence on the Golay encoded ultrasound echoes[C].Proceedings of the Ultrasonics Symposium,New York,USA:IEEE,2007:1274-1277.
[6]Hu CH,Zhou QF.Mismatched-filter design for biphase-coded pulse for high frequency ultrasound imaging[C]//Proceedings of the Ultrasonics Symposium.Vancouver,Canada:IEEE,2006:2222-2225.
[7]彭旗宇,高上凯.医学超声成像中的编码激励技术及其应用[J].生物医学工程学杂志,2005,22(1):175-180.Peng QY,Gao SK.Coded excitation and its application in medical ultrasound imaging[J].Journal of Biomedical Engineering,2005,22(1):175-180.
[8]易正红.相位编码雷达信号特征研究[J].电子对抗技术,2002,17(2):7-10.Yi ZH.Researchs in the signal characteristics of phase-coded radar[J].Electronic Countermeasures Technology,2002,17(2):7-10.
[9]王威琪,周国辉,汪源源,等.关于人体信号和医学超声信号[J].现代临床医学生物工程学杂志,2006,12(15):383-388.Wang WQ,Zhou GH,Wang YY,et al.About body signals and medical ultrasound signal[J].Journal of Modern Clinical Medical Bioengineering,2006,12(15):383-388.
[10]刘波,郭建中.载频调制二相编码激励的超声成像信噪比提高研究[J].电子学报,2011,39(11):212-219.Liu B,Guo JZ.Research on SNR improvement in ultrasonic imaging by coded excitation with carrier modulation[J].Acta Electronica Sinica,2011,39(11):212-219.
[11]Chiao RY,Hao XH.Coded excitation for diagnostic ultrasound:A system developer’s perspective[C]//Proceedings of the Ultrasonics Symposium,Milwaukee,USA:IEEE,2006:437-448.
[12]刘凯,高上凯.高频超声成像中的编码激励研究[J].北京生物医学工程,2007,26(1):31-35.Liu K,Gao SK.Study of coded excitation in high frequency ultrasound imaging[J].Beijing Biomedical Engineering,2007,26(1):31-35.
[13]魏庆国,万国金,刘晔,等.编码激励医学超声成像的仿真[J].南昌大学学报,2007,31(2):201-204.Wei QG,Wang GJ,Liu Y,et al.A simulation study on golay coded excitation in medical ultrasound imaging[J].Journal of Nanchang University(Natural Science),2007,31(2):201-204.
[14]Wang Y,Metzger K.Coded excitation with spectrum inversion(CEXSI)for ultrasound array imaging[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2003,50(7):805-823.
[15]O’Donnell M,Wang Y.Coded excitation for synthetic aperture ultrasound imaging[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2005,52(2):171-176.
[16]Zhao H,Mo LY,Shang-kai Gao.Barker-coded ultrasound color flow imaging:Theoretical and practical design[J].IEEE Transactions on Ultrasonics,Ferroelectrics,and Frequency Control,2005,52(2):319-331.
[17]谷金宏,万明习,王素品,等.基于调频信号发射的超声造影剂谐波成像方法[J].声学学报,2006,31(3):240-246.Gu JH,Wan MX,Wang SP,et al.Ultrasound contrast agent harmonic imaging method based onfrequency-modulated signal excitation[J].Acta Acustica,2006,31(3):240-246.
[18]张碧星,陆铭慧.用时间反转法在水下波导介质中实现自适应聚焦的研究[J].声学学报,2002,27(6):541-548.Zhang BX,Lu MH.Study of self-focusing in underwater waveguide by time reversal method[J].Acta Acustica,2002,27(6):541-548.
[19]张群逸.雷达中的相位编码信号与处理[J].火控雷达技术,2005,34:29-32.Zhang QY.Phase code signal processing of radar[J].Fire Control Radar Technology,2005,34:29-32.
[20]马庆云,杨辉.激励脉冲宽度对超声发射能量的影响[J].矿业研究与开发,2000,20(5):38-40.Ma QY,Yang H.The influence of drive impulse width in ultrasonic emitting energy[J].Mining Research and Development,2000,20(5):38-40.
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