全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

消除冗余循环前缀的水声信道OFDM频域均衡算法

DOI: 10.3969/j.issn.1006??7043.201301031??

Keywords: 水声通信, 频域均衡算法, OFDM, 循环前缀, 多径效应

Full-Text   Cite this paper   Add to My Lib

Abstract:

针对OFDM传统频域均衡算法依赖较长冗余循环前缀,造成水声信道利用率下降的问题,依据OFDM的调制解调原理,在对水声信道多径效应造成影响进行数学建模的基础上,引入多级缓冲机制和判决反馈机制,提出了新型的判决反馈OFDM频域均衡算法。对算法计算量进行了简化,并给出均衡器阶数自适应选择方案。通过仿真和水池实验,证明新算法可以在完全没有循环前缀参与情况下,实现对多径效应的有效补偿,保证了有限水声信道带宽条件下的高速、低误码率的可靠通信。

References

[1]  DENIS B, PIERROT J B. Joint distributed synchronization and positioning in UWB Ad Hoc networks using TOA[J]. IEEE Transactions on Microwave Theory and Techniques, 2006, 154(4):1896?1911.? [2]WU J, ZHENG Y R. Low complexity soft?input soft?output block decision feedback equalization[J] IEEE Sel Areas Communic, 2008, 26(2):281?289.? [3]BIANCHI P, LOUBATON P. On the blind equalization of continuous phase modulated signals using the constant modulus criterion [J]. IEEE Transactions on Signal Processing, 2007, 55(3):1047?1061.? [4]罗亚松,刘忠,胡洪宁.用于多载波水声通信的频域判决反馈均衡算法研究[J].华中科技大学学报,2009,37(3):19?21.?LUO Yasong, LIU Zhong, HU Hongning. Research on the frequency?domain equalization algorithm based on decision feedback structure designed for multi?carrier underwater acoustic communication [J]. Journal of Huazhong University of Science and Technology, 2009, 37(3):19?21.? [5]BARHUMI I, LEUS G. Equalization for OFDM over doubly selective channels[J]. IEEE Transactions on Signal Processing, 2006, 54(4):1445?1457.? [6]STOJANOVIC M. Adaptive channel estimation for underwater acoustic MIMO OFDM systems[C]//IEEE Digital Signal Processing and Signal Processing Education Workshop. Marco Island, USA, 2009.? [7]郭业才,丁雪洁,郭福东.正交小波分数间隔频率分集自优化盲均衡算法[J].兵工学报,2010,31(3):285?290.?GUO Yecai, DING Xuejie, GUO Fudong. A self?optimized blind equalization algorithm based on orthogonal wavelet transform and fractionally spaced frequency diversity [J]. Acta Armamentarii, 2010, 31(3):285?290.? [8]JOSSO N F, ZHANG J J. Time?varying wideband underwater acoustic channel estimation for OFDM communications[C]//ICASSP. Dallas, USA, 2010.? [9]KANG T, RONALD A. Iterative carrier frequency offset and channel estimation for underwater acoustic OFDM systems [J]. IEEE Journal on Selected Areas in Communications, 2008, 26(9):1650?1661.? [10]AKYILDIZ F, DARIO P, TOMMASO M. Underwater acoustic sensor network: research challenges[J]. Ad Hoc Networks, 2005, 3(3):257?279.?

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133