期刊文献+

基于扩频码的单载波迭代频域均衡水声通信 被引量:5

PN-based single carrier block transmission with iterative frequency domain equalization over underwater acoustic channels
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摘要 单载波时域均衡在长时延扩展水声信道中计算量大,并对接收机参数的选择较为敏感,可靠性低,而正交频分复用信号峰均功率比高、对频率偏移敏感.针对这些问题,提出基于扩频码的单载波块传输高速率水声通信方法和基于T/4分数间隔迭代频域均衡的接收机算法.该接收机利用已知扩频码进行信道估计以及对由多普勒偏移引起的旋转相位进行估计,并通过一种低复杂度迭代频域均衡算法改善系统性能.开展了湖上实验研究,结果表明在浅水1.8 km距离且复杂多径干扰条件下,利用BPSK/QPSK调制可实现10 2—10 4的误码率并达到1500—3000 bit/s的有效数据率. Single carrier modulation with time-domain equalization (SC-TDE) in underwater acoustic channel is sensitive to receiver parameters and its computational complexity is very high. Orthogonal frequency division multiplexing (OFDM) signal has high peak-to-average power ratio (PAPR) and is sensitive to Doppler shift. Aiming at these problems, this paper proposes the pseudo-noise (PN)-based single carrier block transmissions through underwater acoustic channels and corresponding receiver algorithms. The receiver employs PN signals for residual Doppler shift estimation, and channel estimation. A low complexity T/4 fractional iterative frequency domain equalizer is introduced to improve the system performance. One underwater acoustic communication system has been designed and tested in a lake in November 2011. At a distance of 1.8 km under a complex channel condition, the useful data rates of around 1500 and 3000 bps are achieved with un-coded bit error rates 10-2–10-4 in the lake experiment.
出处 《物理学报》 SCIE EI CAS CSCD 北大核心 2013年第23期207-213,共7页 Acta Physica Sinica
基金 国家自然科学基金(批准号:61101102 61271415) 高等学校博士学科点专项科研基金(批准号:20106102120011) 西北工业大学基础研究基金(批准号:JC20120219)资助的课题~~
关键词 水声通信 单载波 频域均衡 迭代处理 underwater acoustic communication, single carrier, frequency domain equalization, iterative processing
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参考文献24

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二级参考文献86

共引文献139

同被引文献42

  • 1蔡惠智,刘云涛,蔡慧,邓红超,王永丰.第八讲 水声通信及其研究进展[J].物理,2006,35(12):1038-1043. 被引量:26
  • 2殷敬伟,惠俊英,王逸林,惠娟.M元混沌扩频多通道Pattern时延差编码水声通信[J].物理学报,2007,56(10):5915-5921. 被引量:48
  • 3Kilfoyle D, Baggeroer A 2000 IEEE J. Ocean. Eng. 25 4.
  • 4Stojanovic M, Catipovic J A, Proakis J G 1994 IEEE J. Ocean. Eng. 19 100.
  • 5Huang J G, Sun J, He C B, Shen X H, Zhang Q F 2005 IEEE MAPE.
  • 6Li B, Zhou S, Stojanovic M, Freitag L, Willett P 2008 IEEE J. Ocean. Eng. 33 198.
  • 7He C B, Huang J G, Han J, Zhang Q F 2009 Acta Phys. Sin. 58 8379 (in Chinese).
  • 8He C B, Huang J G, Ding Z 2009 IEEE J. Ocean. Eng. 33 4.
  • 9He C B, Huang J G, Yan Z H, Zhqng Q F 2011 Sci. China Inf. Sci. 54 1747.
  • 10Yin J W, Hui J Y, Wang Y L, Hui J 2007 Acta Phys. Sin. 56 5915 (in Chinese).

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