一种双参数可调的水声信道自适应均衡算法
|
摘要
针对浅海水声信道固有的随机时-空-频变、高噪、强多径等特性及变化的多径时延扩展,在变步长最小均方(LMS)平行滤波器组(PFB-LMS)算法的基础上提出了一种新的水声通信自适应均衡算法。该算法将变阶数和变步长的调整结合起来,降低了算法对迭代步长和均衡器阶数的敏感度。仿真结果表明,新算法在参数适应性方面优于传统LMS及PFB-LMS算法。
The shallow water acoustic channel is characterized as a complex time,space and frequency-variant channel with several negative factors,e.g.narrow band,high ambient noise,multipath distortion and polytropic multipath time delay which pose serious difficulty for the underwater acoustic communication.A novel two-parameter adjustable least mean square(LMS) equalization algorithm is presented based on the classic parallel filter banks LMS(PFB-LMS) algorithm.The new algorithm enables hybrid adjustment of step-size and tap-length so that the sensitivity of step-size and tap-length parameter selections is alleviated.Simulation results show that the new algorithm outperforms the traditional LMS and PFB-LMS algorithms in parameter robustness under time varying channels.
The shallow water acoustic channel is characterized as a complex time,space and frequency-variant channel with several negative factors,e.g.narrow band,high ambient noise,multipath distortion and polytropic multipath time delay which pose serious difficulty for the underwater acoustic communication.A novel two-parameter adjustable least mean square(LMS) equalization algorithm is presented based on the classic parallel filter banks LMS(PFB-LMS) algorithm.The new algorithm enables hybrid adjustment of step-size and tap-length so that the sensitivity of step-size and tap-length parameter selections is alleviated.Simulation results show that the new algorithm outperforms the traditional LMS and PFB-LMS algorithms in parameter robustness under time varying channels.
引文
[1]张刚强,童峰.基于LMS/SOLMS算法的时变多径水声信道估计方法[J].应用声学,2008,27(3):212-216.ZHANG Gang-qiang,TONG Feng.Time-varying underwateracoustic multipath channel estimation based on LMS/SOLMSalgorithm[J].Applied Acoustics,2008,27(3):212-216.(in Chinese)
[2]啜钢,王文博,常永宇.移动通信原理与应用[M].北京:北京邮电大学出版社,2002:99-108.CHUO Gang,WANG Wen-bo,CHANG Yong-yu.The mobilecommunication principles and applications[M].Beijing:BeijingUniversity of Posts and Telecommunications Press,2002:99-108.(in Chinese)
[3]覃景繁,欧阳景正.一种新的变步长LMS自适应滤波算法[J].数据采集与处理,1997,12(3):171-174.QIN Jing-fan,OUYANG Jing-zheng.A novel variable step sizeLMS adaptive filtering algorithm based on sigmoid function[J].Journal of Data Acquisition&Processing,1997,12(3):171-174.(in Chinese)
[4]林川,冯全源.变抽头长度LMS自适应滤波算法[J].电子与信息学报,2008,30(7):1676-1679.LIN Chuan,FENG Quan-yuan.Variable tap-length LMS adaptivefiltering algorithm[J].Journal of Electronics&InformationTechnology,2008,30(7):1676-1679.(in Chinese)
[5]彭琴,童峰.浅海水声信道自适应均衡算法[J].厦门大学学报:自然科学版,2011,50(4):724-728.PENG Qin,TONG Feng.Experimental studies on shallow sateracoustic channel equalization[J].Journal of Xiamen University:Natural Science,2011,50(4):724-728.(in Chinese)
[6]童峰,许肖梅,方世良.一种单频水声信号多径时延估计算法[J].声学学报,2008,33(1):62-68.TONG Feng,XU Xiao-mei,FANG Shi-liang.Multipath time-delay estimation of underwater acoustic sinusoidal signals[J].Acta Acoustic,2008,33(1):62-68.(in Chinese)
[7]Riera-Palou F,Noras J M,Cruickshank D G M.Linear equalizerswith dynamic and automatic length selection[J].ElectronicsLetters,2001,37(25):1553-1554.
[8]Gu Y,Tang K,Cui H.LMS algorithm with gradient descent filterlength[J].Signal Processing Letters,2004,11(3):305-307.
[9]Gong Y,Cowan C F N.An LMS style variable tap-lengthalgorithm for structure adaptation[J].IEEE Transactions on SignalProcessing,2005,53(7):2400-2407.
[10]孟玲玲,秦秀娟.一种新的变步长LMS自适应算法及其应用[J].电子测量技术,2008,31(5):35-37.MENG Ling-ling,QIN Xiu-juan.New variable step-size LMSalgorithm and its simulation[J].Electronic MeasurementTechnology,2008,31(5):35-37.(in Chinese)
[11]罗亚松,刘忠,夏清涛,等.具有强抗干扰能力的水声信道盲均衡算法[J].华中科技大学学报:自然科学版,2009,37(10):60-63.LUO Ya-song,LIU Zhong,XIA Qing-tao,et al.Algorithm of blindequalization with robust anti-jamming on underwater acousticchannels[J].Journal of Huazhong University of Science andTechnology:Nature Science Edition,2009,37(10):60-63.(inChinese)
[12]高丽娟,赵洪利,蒋太杰.一种改进的变步长常数模算法[J].电子与信息学报,2007,29(2):283-286.GAO Li-juan,ZHAO Hong-li,JIANG Tai-jie.A modified variablestep size constant modulus algorithm[J].Journal of Electronics&Information Technology,2007,29(2):283-286.(in Chinese)
[13]Li W,Preisig J C.Estimation of rapidly time-varying sparsechannels[J].IEEE Journal of Oceanic Engineering,2007,32(4):927-939.
[14]Porter M B,McDonald V K,Baxley P A,et al.SignalEx:linkingenvironmental acoustics with the signaling schemes[C]∥OCEANS2000 MTS/IEEE Conference and Exhibition.US:IEEE,2000:595-600.
[2]啜钢,王文博,常永宇.移动通信原理与应用[M].北京:北京邮电大学出版社,2002:99-108.CHUO Gang,WANG Wen-bo,CHANG Yong-yu.The mobilecommunication principles and applications[M].Beijing:BeijingUniversity of Posts and Telecommunications Press,2002:99-108.(in Chinese)
[3]覃景繁,欧阳景正.一种新的变步长LMS自适应滤波算法[J].数据采集与处理,1997,12(3):171-174.QIN Jing-fan,OUYANG Jing-zheng.A novel variable step sizeLMS adaptive filtering algorithm based on sigmoid function[J].Journal of Data Acquisition&Processing,1997,12(3):171-174.(in Chinese)
[4]林川,冯全源.变抽头长度LMS自适应滤波算法[J].电子与信息学报,2008,30(7):1676-1679.LIN Chuan,FENG Quan-yuan.Variable tap-length LMS adaptivefiltering algorithm[J].Journal of Electronics&InformationTechnology,2008,30(7):1676-1679.(in Chinese)
[5]彭琴,童峰.浅海水声信道自适应均衡算法[J].厦门大学学报:自然科学版,2011,50(4):724-728.PENG Qin,TONG Feng.Experimental studies on shallow sateracoustic channel equalization[J].Journal of Xiamen University:Natural Science,2011,50(4):724-728.(in Chinese)
[6]童峰,许肖梅,方世良.一种单频水声信号多径时延估计算法[J].声学学报,2008,33(1):62-68.TONG Feng,XU Xiao-mei,FANG Shi-liang.Multipath time-delay estimation of underwater acoustic sinusoidal signals[J].Acta Acoustic,2008,33(1):62-68.(in Chinese)
[7]Riera-Palou F,Noras J M,Cruickshank D G M.Linear equalizerswith dynamic and automatic length selection[J].ElectronicsLetters,2001,37(25):1553-1554.
[8]Gu Y,Tang K,Cui H.LMS algorithm with gradient descent filterlength[J].Signal Processing Letters,2004,11(3):305-307.
[9]Gong Y,Cowan C F N.An LMS style variable tap-lengthalgorithm for structure adaptation[J].IEEE Transactions on SignalProcessing,2005,53(7):2400-2407.
[10]孟玲玲,秦秀娟.一种新的变步长LMS自适应算法及其应用[J].电子测量技术,2008,31(5):35-37.MENG Ling-ling,QIN Xiu-juan.New variable step-size LMSalgorithm and its simulation[J].Electronic MeasurementTechnology,2008,31(5):35-37.(in Chinese)
[11]罗亚松,刘忠,夏清涛,等.具有强抗干扰能力的水声信道盲均衡算法[J].华中科技大学学报:自然科学版,2009,37(10):60-63.LUO Ya-song,LIU Zhong,XIA Qing-tao,et al.Algorithm of blindequalization with robust anti-jamming on underwater acousticchannels[J].Journal of Huazhong University of Science andTechnology:Nature Science Edition,2009,37(10):60-63.(inChinese)
[12]高丽娟,赵洪利,蒋太杰.一种改进的变步长常数模算法[J].电子与信息学报,2007,29(2):283-286.GAO Li-juan,ZHAO Hong-li,JIANG Tai-jie.A modified variablestep size constant modulus algorithm[J].Journal of Electronics&Information Technology,2007,29(2):283-286.(in Chinese)
[13]Li W,Preisig J C.Estimation of rapidly time-varying sparsechannels[J].IEEE Journal of Oceanic Engineering,2007,32(4):927-939.
[14]Porter M B,McDonald V K,Baxley P A,et al.SignalEx:linkingenvironmental acoustics with the signaling schemes[C]∥OCEANS2000 MTS/IEEE Conference and Exhibition.US:IEEE,2000:595-600.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |