一种线性约束连续自适应方向图控制方法
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摘要
针对任意阵列天线的自适应空域滤波和低副瓣控制的问题,提出了一种连续自适应方向图控制方法。该方法通过采用线性约束最小方差准则的方向图综合算法(LCMV-PS)产生具有低副瓣特性的静态权矢量,利用该权矢量构造出新的约束条件,进行线性约束最小均方误差(LMS)自适应波束形成。该方法避免了常规的线性约束最小方差(LCMV)算法的矩阵求逆运算,计算复杂度低。对几种天线阵形的计算机仿真结果表明该方法收敛速度快,稳态性能良好。
For adaptive spatial filtering and low-sidelobe level controlling for arbitrary array,a sample-by-sample adaptive pattern control method is proposed. By adopting Linearly Constrained Minimum Variance Pattern Synthesis( LCMV-PS),the method achieves a static weight vector,which has the property of low-sidelobe level. The weight vector is used to construct a new constraint,and based on linearly constrained Least Mean Square( LMS) the optimal weight vector of adaptive beamforming is obtained. The method avoids the inverse of the sample covariance matrix,thus enjoying lower computational complexity. Simulations for several kinds of antenna structure demonstrate that the method has a fast convergent rate and better performance than other sample-by-sample pattern control methods.
For adaptive spatial filtering and low-sidelobe level controlling for arbitrary array,a sample-by-sample adaptive pattern control method is proposed. By adopting Linearly Constrained Minimum Variance Pattern Synthesis( LCMV-PS),the method achieves a static weight vector,which has the property of low-sidelobe level. The weight vector is used to construct a new constraint,and based on linearly constrained Least Mean Square( LMS) the optimal weight vector of adaptive beamforming is obtained. The method avoids the inverse of the sample covariance matrix,thus enjoying lower computational complexity. Simulations for several kinds of antenna structure demonstrate that the method has a fast convergent rate and better performance than other sample-by-sample pattern control methods.
引文
[1]戴凌燕,王永良,李荣峰.基于不确定集的稳健Capon波束形成算法性能分析[J].电子与信息学报,2009,31(12):2931-2936.DAI Lingyan,WANG Yongliang,LI Rongfeng.Performance analysis of robust Capon beamforming based on uncertainty set[J].Journal of Electronics&Information Technology,2009,31(12):2931-2936.(in Chinese)
[2]张静宇,王宇,楼大年.一种改进的基于LC-GSC的主瓣干扰抑制方法[J].电讯技术,2014,54(2):163-168.ZHANG Jingyu,WANG Yu,LOU Danian.An improved mainlobe interference suppression method based on generalized sidelobe canceller[J].Telecommunication Engineering,2014,54(2):163-168.(in Chinese)
[3]XU J W,LIAO G H,ZHU S Q.Robust LCMV beamforming based on phase response constraint[J].Electronics Letters,2012,48(20):1304-1306.
[4]STROBACH P.Low-rank adaptive filters[J].IEEE Transactions on Signal Processing,1996,44(12):2932-2947.
[5]FARHANG-BOROUJENY B.Adaptive filters theory and applications[M].Chichester,England:John Wiley&Sons,1998.
[6]BRESLER A D.A new algorithm for calculating the current distributions of Dolph-Chebyshev arrays[J].IEEETransactions on Antennas and Propagation,1980,28(6):951-952.
[7]TSENG F I,CHENG D K.Optimum scannable planar arrays with an invariant sidelobe level[J].Proceedings of the IEEE,1968,56(11):1771-1778.
[8]OLEN C A,COMPTON R T.A numerical pattern synthesis algorithm for arrays[J].IEEE Transactions on Antennas and Propagation,1990,38(10):1666-1676.
[9]GUO Q H,LIAO G S,WU Y T,et al.Pattern synthesis method for arbitrary arrays based on LCMV criterion[J].IEE Electronics Letters,2003,39(13):1628-1630.
[10]刘聪锋,廖桂生.改进的快速稳健任意阵列天线方向图综合方法[J].电波科学学报,2009,24(1):104-110.LIU Congfeng,LIAO Guisheng.Improved fast robust pattern synthesis method for arbitrary arrays[J].Chinese Journal of Radio Science,2009,24(1):104-110.(in Chinese)
[11]苏保伟,王永良,周良柱.基于LCMV线性约束的自适应方向图控制[J].电子与信息学报,2008,30(2):282-285.SU Baowei,WANG Yongliang,ZHOU Liangzhu.A novel adaptive pattern control method based on LCMV[J].Journal of Electronics&Information Technology,2008,30(2):282-285.(in Chinese)
[12]VEGA L R,BENESTY H R J,TRESSENS S.A fast robust recursive least-squares algorithm[J].IEEE Transactions on Signal Processing,2009,57(3):1209-1216.
[2]张静宇,王宇,楼大年.一种改进的基于LC-GSC的主瓣干扰抑制方法[J].电讯技术,2014,54(2):163-168.ZHANG Jingyu,WANG Yu,LOU Danian.An improved mainlobe interference suppression method based on generalized sidelobe canceller[J].Telecommunication Engineering,2014,54(2):163-168.(in Chinese)
[3]XU J W,LIAO G H,ZHU S Q.Robust LCMV beamforming based on phase response constraint[J].Electronics Letters,2012,48(20):1304-1306.
[4]STROBACH P.Low-rank adaptive filters[J].IEEE Transactions on Signal Processing,1996,44(12):2932-2947.
[5]FARHANG-BOROUJENY B.Adaptive filters theory and applications[M].Chichester,England:John Wiley&Sons,1998.
[6]BRESLER A D.A new algorithm for calculating the current distributions of Dolph-Chebyshev arrays[J].IEEETransactions on Antennas and Propagation,1980,28(6):951-952.
[7]TSENG F I,CHENG D K.Optimum scannable planar arrays with an invariant sidelobe level[J].Proceedings of the IEEE,1968,56(11):1771-1778.
[8]OLEN C A,COMPTON R T.A numerical pattern synthesis algorithm for arrays[J].IEEE Transactions on Antennas and Propagation,1990,38(10):1666-1676.
[9]GUO Q H,LIAO G S,WU Y T,et al.Pattern synthesis method for arbitrary arrays based on LCMV criterion[J].IEE Electronics Letters,2003,39(13):1628-1630.
[10]刘聪锋,廖桂生.改进的快速稳健任意阵列天线方向图综合方法[J].电波科学学报,2009,24(1):104-110.LIU Congfeng,LIAO Guisheng.Improved fast robust pattern synthesis method for arbitrary arrays[J].Chinese Journal of Radio Science,2009,24(1):104-110.(in Chinese)
[11]苏保伟,王永良,周良柱.基于LCMV线性约束的自适应方向图控制[J].电子与信息学报,2008,30(2):282-285.SU Baowei,WANG Yongliang,ZHOU Liangzhu.A novel adaptive pattern control method based on LCMV[J].Journal of Electronics&Information Technology,2008,30(2):282-285.(in Chinese)
[12]VEGA L R,BENESTY H R J,TRESSENS S.A fast robust recursive least-squares algorithm[J].IEEE Transactions on Signal Processing,2009,57(3):1209-1216.