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多途条件下聚焦波束近程定位 被引量:17

Focusing beamform location in multipath channel
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摘要 讨论了直线阵通过聚焦波束形成技术对近程点目标的高精度定位问题并通过仿真验证,对多途的影响及海面起伏的影响也作了初步分析。通过波束引导减少了扫描的运算量,并且通过虚阵、时间反转镜和乘积声图的方法提高了聚焦点"亮度"和声图质量。仿真结果表明,虚阵和时间反转镜技术可以较好地抑制多途干涉,使用乘积声图可以使观察到的信号变得更清晰。在信噪比为0dB时可以很好地检测到目标。 This paper discusses the high precision locating problem of dot target in nerofield by using the technique of focusing beam forming with linear array. The effect of multi-path and fluctuates of sea surface are analyzed. By the beam leading the computations for scanning is reduced, and by using the methods of virtual array, time reverse mirror and product of sound-map, the "brightness" of focusing and the quality of stored-map are improved. The result of simulating tests show that the methods of vir- tual array and time reverse mirror can restrain the interference brought by multi-path, and that the application of the product of stored-map makes the target dot clearer. The target can be easily detected when the SNR is as low as 0db.
出处 《声学技术》 CSCD 北大核心 2007年第6期1101-1107,共7页 Technical Acoustics
关键词 聚焦波束形成 虚阵 时间反转镜 乘积声图 focus beam form fake array time reverse mirror product of sound map
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参考文献8

  • 1李颂文.不同波束形成的参量阵近场比较[J].声学技术,2001,20(2):81-83. 被引量:3
  • 2田坦,刘国枝,孙大军,声纳技术[M],哈尔滨工程大学出版社.2000,63.
  • 3卢逢春,张殿仑,田坦.一种设计方便可实现加权及近场聚焦的电阻相移波束形成器[J].哈尔滨工程大学学报,2000,21(3):29-33. 被引量:2
  • 4生雪莉,惠俊英,梁国龙.时间反转镜用于被动检测技术的研究[J].应用声学,2005,24(6):351-358. 被引量:29
  • 5殷敬伟 惠俊英.虚拟时间反转镜技术[J].声学技术,2005,:98-100.
  • 6YIN Jingwei, HUI Junying. Study on a new channel equalization-virtual time reversal mirror[A]. The 4th International Symposium on Acoustic Engineering and Technology[C]. Harbin, China, Oct, 2005.
  • 7Silva A, Jesus S, Gomes J, et al. Underwater acoustic communication using a "virtual" electronic time-reversal mirror approach[A]. 5th European Conference on Underwater Acoustics[C]. France, 531-536, June, 2000.
  • 8Silva A., Jesus S. Underwater communications using virtual time reversal in a variable geometry channel[A]. IEEE Oceans Cord[C]. Record 4, 2416-2421, 2002.

二级参考文献13

  • 1[1]J.Durin:Exact solution for nondiffracting beams.I.The scalar theory[J].Opt.Soc.Am.1987,A4(4):651-654.
  • 2[2]Westervelt.P.J, Parametric acoustic array[J].J.Acoust.Soc.Am 1963,35(4):535-537.
  • 3[3]E.H.Verfring,J.N.Tjotta and S.Tjotta,Nonlinear effects in the soundfield of bifrequency source[A].Pro-ceeding of 12th ISNA[C],London Edited by M.F.Hamilton and D.T.Blackstock,Elsevier Science Publishers Ltd,1990:251-256.
  • 4[4]Jian-yu Lu and J.F.Greenleaf,Ultrasonic nondiffracting transducer for medical imaging[J].IEEE Trans.Ultra and Freq.Contrl.1990,37(5):438-447.
  • 5[5]J.Zemanek.Beam behavior within the near field of a vibrating piston[J],J.Acoust.Soc.Am 1971,49(1):181-191.
  • 6[6]J.N.Tjotta and S.Tjotta,E.H.Verfring,Effects of focusing on the nonlinear interaction between two collinear finite amplitude sound beam[J].J.Acoust.Soc.Am 1991,89(2):1017-1027.
  • 7王玉泉.水声设备[M].北京:国防工业出版社,1989.
  • 8Tian T,Guan H,Liu G Z,et al.A study of detecting and imaging small targets on seabed[J].Acoustical Imaging,1997,23:563 - 568.
  • 9范敏毅,惠俊英.点噪声源在近程声场中传播损失的仿真研究[J].应用声学,1998,17(6):35-38. 被引量:8
  • 10魏 炜,汪承灏.有平界面存在时时间反转法的自聚焦性能[J].应用声学,1999,18(3):1-5. 被引量:10

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