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Code divided multiple access (CDMA) underwater communication based on single vector sensor is studied in this paper. The most common methods to estimate azimuth with self-directivity of single vector sensor are average sound intensity method and complex sound intensity method, however, for the same frequency band multi-users, these methods are limited to the measurement of azimuths only for two users at the same time theoretically. An active average intensity method, which measures the azimuths of multi-users simultaneously with the excellent correlative characteristics of pseudo-random code in spread spectrum communication, is proposed in this paper. With the estimated azimuth, vector combination can be generated to adjust the directivity of vector sensor, achieve multi-user beam communication, inhibit multi-path interference, and enhance processing gain and lower error rate. Simulation and experiment for same frequency band spread spectrum multi-user communication testify the feasibility and utility of active average sound intensity method.
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Keywords:
- underwater acoustic communication /
- CDMA /
- single vector sensor /
- active acoustic intensity average
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[2] [3] Yin J W,Wang Y L,Wang L,Hui J Y 2009 Chinese Science Bulletin 54 1302
[4] [5] Yin J W 2011 The Theory and Signal Processing Technology of Underwater Acoustic Communication (Beijing:National Defence Industry Press) p9 (in Chinese) [殷敬伟 2011 \水声通信原理及信号处理技术 (北京:国防工业出版社) 第9页]
[6] [7] Charalampos C T,Oliver R H,Alan E A,Bayan S S 2001 IEEE J.Oceanic Eng.26 594
[8] [9] Yang T C,Yang W B 2008 J.Acoust.Soc.Am.123 842
[10] [11] Yin J W,Hui J Y,Wang Y L,Hui J 2007 Acta Phys.Sin.56 5915(in Chinese) [殷敬伟,惠俊英,王逸林,惠娟 2007 \物理学报 56 5915]
[12] He C B,Huang J G,Han J,Zhang Q F 2009 Acta Phys.Sin.58 8379 (in Chinese) [何成兵,黄建国,韩晶,张群飞 2009 物理学报 58 8379]
[13] [14] [15] Hui J Y,Hui J 2009 Acoustic Signal Processing Based on Vector(Beijing:National Defence Industry Press) p29 (in Chinese) [惠俊英,惠娟 2009 矢量声信号处理基础 (北京:国防工业出版社) 第29页]
[16] Sang E F,Qiao G 2006 Acta Acustica 31 61 (in Chinese) [桑恩方,乔钢 2006 声学学报 31 61]
[17] [18] Hui J Y,Wang D Y,Zhang G P,Yin J W,Wang X L 2010 Acta Armamentar 31 703 (in Chinese) [惠俊英,王大宇,张光普,
[19] [20] Hui J Y,Li C X,Liang G L,Liu H 2000 Acta Acustica 2000 9 389(in Chinese) [惠俊英,李春旭,梁国龙,刘宏 2000 声学学报 9 389]
[21] [22] Yang S E 2003 Journal of Harbin Engineering University 24 591(in Chinese) [杨士莪 2003 哈尔滨工程大学学报 24 591]
[23] 殷敬伟,王晓琳 2010 兵工学报 31 703]
[24] [25] -
[1] Sozer E M,Stojanovic M,Proakis J G 2000 IEEE J.Oceanic Eng.25 72
[2] [3] Yin J W,Wang Y L,Wang L,Hui J Y 2009 Chinese Science Bulletin 54 1302
[4] [5] Yin J W 2011 The Theory and Signal Processing Technology of Underwater Acoustic Communication (Beijing:National Defence Industry Press) p9 (in Chinese) [殷敬伟 2011 \水声通信原理及信号处理技术 (北京:国防工业出版社) 第9页]
[6] [7] Charalampos C T,Oliver R H,Alan E A,Bayan S S 2001 IEEE J.Oceanic Eng.26 594
[8] [9] Yang T C,Yang W B 2008 J.Acoust.Soc.Am.123 842
[10] [11] Yin J W,Hui J Y,Wang Y L,Hui J 2007 Acta Phys.Sin.56 5915(in Chinese) [殷敬伟,惠俊英,王逸林,惠娟 2007 \物理学报 56 5915]
[12] He C B,Huang J G,Han J,Zhang Q F 2009 Acta Phys.Sin.58 8379 (in Chinese) [何成兵,黄建国,韩晶,张群飞 2009 物理学报 58 8379]
[13] [14] [15] Hui J Y,Hui J 2009 Acoustic Signal Processing Based on Vector(Beijing:National Defence Industry Press) p29 (in Chinese) [惠俊英,惠娟 2009 矢量声信号处理基础 (北京:国防工业出版社) 第29页]
[16] Sang E F,Qiao G 2006 Acta Acustica 31 61 (in Chinese) [桑恩方,乔钢 2006 声学学报 31 61]
[17] [18] Hui J Y,Wang D Y,Zhang G P,Yin J W,Wang X L 2010 Acta Armamentar 31 703 (in Chinese) [惠俊英,王大宇,张光普,
[19] [20] Hui J Y,Li C X,Liang G L,Liu H 2000 Acta Acustica 2000 9 389(in Chinese) [惠俊英,李春旭,梁国龙,刘宏 2000 声学学报 9 389]
[21] [22] Yang S E 2003 Journal of Harbin Engineering University 24 591(in Chinese) [杨士莪 2003 哈尔滨工程大学学报 24 591]
[23] 殷敬伟,王晓琳 2010 兵工学报 31 703]
[24] [25]
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