[1]王永刚,郑翠娥,孙大军.基于导频的OFDM水下通信信道估计[J].应用科技,2009,36(01):43-47.
 WANG Yong-gang,ZHENG Cui-e,SUN Da-jun.Pilot based channel estimation for OFDM underwater communication[J].Applied science and technology,2009,36(01):43-47.
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基于导频的OFDM水下通信信道估计
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《应用科技》[ISSN:1009-671X/CN:23-1191/U]

卷:
第36卷
期数:
2009年01期
页码:
43-47
栏目:
现代电子技术
出版日期:
2009-01-05

文章信息/Info

Title:
Pilot based channel estimation for OFDM underwater communication
文章编号:
1009-671X(2009)01-0043-05
作者:
王永刚12郑翠娥1孙大军
1.哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001;2.中国船舶工业集团船舶系统工程部,北京100036
Author(s):
WANG Yong-gang1ZHENG Cui-e2 SUN Da-jun
(1.College of Underwater Acoustic Engineering,Harbin Engineering University, Harbin 150001,China;
2. Systems Engineering Research Institution, China State Shipbuilding Corporation,Beijing 100036,China)
关键词:
OFDM水下通信信道估计变换域信号处理
Keywords:
OFDM underwater communication channel estimation transform domain signal processing
分类号:
TN911.75
文献标志码:
A
摘要:
信道估计是OFDM水下通信相干解调的必要步骤.通过插入位置已知的导频信息,OFDM接收机可以知道水声信道在导频位置的频率响应.根据插入导频位置的不同,信道估计的性能也有很大的差异.块状、梳状和分散型3种导频分布方式被证明分别适用于不同的水声信道环境.水声信道可以看做是一个梳状滤波器,通过信道估计可以得到试验信道的通带和阻带.阻带的信道估计错误往往要大于通带,尤其是当信道的相干带宽较小时,这种现象则更为明显.子载波间干扰会对信道估计性能造成很大影响,利用改进的变换域滤波器导频降噪方法可以有效地降低这种影响.
Abstract:
Channel estimation is a compulsory task for coherent OFDM underwater communication. Channel frequency response can be estimated by pilots that are already known to the receiver. BER performance can vary a lot according to different type of pilot pattern. Three kinds of pilot distributions (block, comb and scatter) are analyzed, each of which is proved to work well in some certain underwater environment. Underwater channel is demonstrated to be a comb filter. With channel estimation, stopband and passband of the experiment channel are found and analyzed. Channel estimation error is more likely to occur in stopband than in passband, especially when the channel coherence bandwidth is small. Interchannel interference can cause large estimation error by increasing its noise level. An improved transform domain filter can reduce the estimation SNR significantly.

参考文献/References:

[1]MOSTOFI Y,DONALD C C. Mathematical analysis of the impact of timing synchronization errors on the performance of an OFDM system[J]. IEEE TC,2006,54(2):226-230.
[2]POLLET T,BLADEL M V, MOENECLAY M. BER sensitivity of OFDM systems to carrier frequency offset and wiener phase noise[J]. IEEE Trans on Commun ,1995,43(2):191-193.
[3] CAPOGLU I R, YE Li,SWAMI A. Effect of Doppler spread in OFDMbased UWB systems[J]. IEEE Trans on Commun,2005,4(5):2559-2567.
[4]黄建国,孙静,何成兵,等.OFDM高速水声通信系统及实验研究[J]. 计算机仿真,2006,23(2):18-20.
[5]BEEK J J,EDFORS O, SANDELL M, WILSON S K,BORJESSON P O. On channel estimation in OFDM systems [C]// Proc IEEE Vehicular Technology Conf. Chicago, USA,1995.
[6]LI Baosheng, ZHOU Shengli, STOJANOVIC M, LEE Freitag. Pilottone based ZP-OFDM Demodulation for an Underwater Acoustic Channel[C]//Proc MTS/IEEE Oceans.Boston,USA, 2006:1-5.
[7]ZHAO Y,HUANG A. A novel channel estimation method for OFDM mobile communication systems based on pilot signals and transform-domain processing[C]//Proc IEEE 47th Vehicular Technology Conference Phoenix, USA, 1997:2089-2093.
[8]KIM B ,LU I. Parameter studies of OFDM underwater communications systems[C]// Proc MTS/IEEE Oceans.Providence,USA,2000:239-246.
[9]SHARIF B S,NEASHAM J, HINTON O R,et al. Adaptive Doppler compensation for coherent acoustic communication[J]. IEEE Proc-Radar, Sonar Navig,2000,147(5):239-246.
[10]王永刚. OFDM水下通信信道估计与同步技术研究 \[D\]. 哈尔滨:哈尔滨工程大学, 2007.
[11]PROAKIS J G. Digital communication\[M\]. 4th ed. New York: McGrawHill, 2001.
[12]惠俊英. 水下声信道\[M\].北京:国防工业出版社,1992

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备注/Memo

备注/Memo:
作者简介:王永刚(1981-),男,硕士研究生,主要研究方向:水声信号处理,E-mail:wg.wang@eee.org.
更新日期/Last Update: 2009-03-10