恒模盲均衡算法在运载器通信系统中的应用
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摘要
为实现运载器快速机动发射,运载器与地面测试系统突破传统电缆束缚,采用无线通信方式进行信息交互。随着无线通信速率的不断提高,尤其是在多径干扰和敌方干扰下信道呈现出频率选择性衰落,接收端将产生严重的码间干扰(ISI),系统误码率难以满足运载器与地面测试系统通信需求。为此研究了恒模盲均衡算法(CMA),并在此基础上提出了改进的CMA算法,理论分析与仿真结果表明,改进算法能有效抑制噪声,收敛速度快,稳态均方误差更小,均衡后的信号恢复效果明显。
Aiming at achieving carrier rapid and flexible lunch,the traditional cable constraints are broken by carrier and ground test systems by using wireless communication for information exchange. With the increase of wireless communication rate,in particular,the channel exhibits frequency-selective fading under multipath interference and enemy interference. The receiver has serious ISI,and the system bit error is different to meet requirements of the carrier and ground test system communication. For this reason,the CMA blind equalization algorithm is studied. On the basis of this algorithm,the optimization design is proposed.Theoretical analysis and simulation results shows that the improved algorithm can effectively suppress the noise and has fast convergence,and the mean square error of the steady state is smaller and the signal recover effect after the equalization is obvious.
Aiming at achieving carrier rapid and flexible lunch,the traditional cable constraints are broken by carrier and ground test systems by using wireless communication for information exchange. With the increase of wireless communication rate,in particular,the channel exhibits frequency-selective fading under multipath interference and enemy interference. The receiver has serious ISI,and the system bit error is different to meet requirements of the carrier and ground test system communication. For this reason,the CMA blind equalization algorithm is studied. On the basis of this algorithm,the optimization design is proposed.Theoretical analysis and simulation results shows that the improved algorithm can effectively suppress the noise and has fast convergence,and the mean square error of the steady state is smaller and the signal recover effect after the equalization is obvious.
引文
[1]郭丽华.自适应盲均衡算法在通信系统中应用的研究[D].哈尔滨工程大学,2004.(Guo Lihua.The Research of Blind Adaptive Equalization Algorithm for Communication Systems[D].Harbin Engineering University,2004.)
[2]罗书建.无线通信系统中自适应信道均衡算法研究与实现[D].电子科技大学,2015.(Luo Shujian.Study and Implementation of Adaptive Channel Equalization Algorithm for Wireless Communication System[D].School of Information&Information Engmeermg,2015.)
[3]高丽娟,赵洪利,钱磊.改进CMA盲均衡算法的研究与分析[J].装备指挥技术学院学报,2006,(6):89-93.(Gao Lijuan,Zhao Hongli,Qian Lei.Study and Analysis for a Modified Blind Equalization Algorithm of CMA[J].Journal of the Academy of Equipment Command&Technology,2006,(6):89-93.)
[4]朱振超,梁广真.一种新型变步长CMA盲均衡算法[J].现代电子技术,2014,37(18):56-59,62.(Zhu Zhenchao,Liang Guangzhen.A New Variable Step-size CMA Blind Equalization Algorithm[J].Modern Electronics Technique,2014,37(18):56-59,62.)
[5]马宏伟,龙沪强,管云峰,何大治.无线通信中消除码间干扰的研究[J].电视技术,2006,(1):66-68.(Ma Hongwei,Long Huqiang,Guan Yunfeng,He Dazhi.Research of Eliminating Intersymbol Interference in Wireless Communications[J].Television Technology,2006,(01):66-68.)
[6]蔡理金.CMA算法盲均衡性能分析[J].通信技术,2011,44(12):19-20,23.(Cai Lijin.Analysis on Blind Equalization Performance of CMA Algorithm[J].Communications Technology,2011,4(12):19-20,23.)
[7]陈旭.基于MIMO系统的盲均衡算法研究[J].电子科技,2014,27(9):13-15,20.(Chen Xu.Research on Blind Equalization Algorithm in MIMO Systems[J]Electronic Sci.&Tech,2014,27(9):13-15+,20.)
[8]邱政,蒋楚欧,潘元璋.一种用于水声通信的快速自适应均衡器设计[J].电子科技,2014,27(12):147-149,154.(Qiu Zheng,Jiang Chuou,Pan Yuanzhang.Design of a Fast Adaptive Equalizer for Underwater Acoustic Communication[J].Electronic Sci.Tech,2014,27(12):147-149,154.)
[2]罗书建.无线通信系统中自适应信道均衡算法研究与实现[D].电子科技大学,2015.(Luo Shujian.Study and Implementation of Adaptive Channel Equalization Algorithm for Wireless Communication System[D].School of Information&Information Engmeermg,2015.)
[3]高丽娟,赵洪利,钱磊.改进CMA盲均衡算法的研究与分析[J].装备指挥技术学院学报,2006,(6):89-93.(Gao Lijuan,Zhao Hongli,Qian Lei.Study and Analysis for a Modified Blind Equalization Algorithm of CMA[J].Journal of the Academy of Equipment Command&Technology,2006,(6):89-93.)
[4]朱振超,梁广真.一种新型变步长CMA盲均衡算法[J].现代电子技术,2014,37(18):56-59,62.(Zhu Zhenchao,Liang Guangzhen.A New Variable Step-size CMA Blind Equalization Algorithm[J].Modern Electronics Technique,2014,37(18):56-59,62.)
[5]马宏伟,龙沪强,管云峰,何大治.无线通信中消除码间干扰的研究[J].电视技术,2006,(1):66-68.(Ma Hongwei,Long Huqiang,Guan Yunfeng,He Dazhi.Research of Eliminating Intersymbol Interference in Wireless Communications[J].Television Technology,2006,(01):66-68.)
[6]蔡理金.CMA算法盲均衡性能分析[J].通信技术,2011,44(12):19-20,23.(Cai Lijin.Analysis on Blind Equalization Performance of CMA Algorithm[J].Communications Technology,2011,4(12):19-20,23.)
[7]陈旭.基于MIMO系统的盲均衡算法研究[J].电子科技,2014,27(9):13-15,20.(Chen Xu.Research on Blind Equalization Algorithm in MIMO Systems[J]Electronic Sci.&Tech,2014,27(9):13-15+,20.)
[8]邱政,蒋楚欧,潘元璋.一种用于水声通信的快速自适应均衡器设计[J].电子科技,2014,27(12):147-149,154.(Qiu Zheng,Jiang Chuou,Pan Yuanzhang.Design of a Fast Adaptive Equalizer for Underwater Acoustic Communication[J].Electronic Sci.Tech,2014,27(12):147-149,154.)