|Table of Contents|

Robust parallel beamforming algorithm based on variable loading


Research Field:
Publishing date:


Robust parallel beamforming algorithm based on variable loading
Lu ChengjunSheng WeixingHan YubingMa Xiaofeng
School of Electronic Engineering and Optoelectronic Technology,NUST,Nanjing 210094,China
variable loading robustness partial parallel beamforming norm constraint gradient search
For large array antenna systems,a beamforming algorithm is proposed to decrease the large amount of computation and high-rate data transmission in beamforming process.A norm constraint to the weight vector of conventional linearly constrained minimum variance(LCMV)algorithm is applied,and a new variable loading recursive LCMV(VLRLCMV)algorithm is proposed here.The optimal weight vector is obtained by gradient searching.A parallel variable loading recursive LCMV(PVLRLCMV)algorithm is proposed by combining the VLRLCMV algorithm with the partial parallel idea.The proposed algorithm can efficiently enhance the robustness and decrease the computational burden,so that it can satisfy the real time requirement of the system.Theoretical analyses and simulation results demonstrate that only 11N+5 times of complex multiplication are required for weight coefficient updating once,and the output signal-to-interference-plus-noise ratio(SINR)is close to the optimal value and independent of the piecemeal way.


[1] Chapman D J.Partial adaptivity for the large array[J].IEEE Transactions on Antennas and Propagation,1976,24(5):685-696.
[2]Nuttal J A,Willett P.Adaptive-adaptive narrowband subarray beamforming[A].International Conference on Acoustics,Speech and Signal Processing[C].Minneapolis,USA:IEEE,1993:305-308.
[3]Yu S J,Lee J H.Adaptive array beamforming based on an efficient technique[J].IEEE Trans on Antennas and Propagation,1996,44(8):1094-1101.
[4]Vural A M.Effects of perturbation on the performance of optimum adaptive arrays[J].IEEE Transactions on Aerospace and Electronic Systems,1979,15(1):76-87.
[5]Joseph R G.Theory and applications of covariance matrix tapers for robust adaptive beamforming[J].IEEE Transactions on Signal Processing,1999,47(4):977-985.
[6]Gu Jing.Robust beamforming based on variable loading[J].Electronics Letters,2005,41(2):55-56.
[7]Selen Y,Abrahamsson R,Stoica P.Automatic robust adaptive beamforming via ridge regression[J].Signal Processing,2007,88(1):33-49.
[8]Du Lin,Li Jian.Fully automatic computation of diagonal loading levels for robust adaptive beamforming[J].IEEE Transactions on Aerospace and Electronic Systems,2010,46(1):449-458.
Jin Wei,Jia Weimin,Yao Minli.Iterative diagonally loaded sample matrix inverse robust adaptive beamforming[J].Journal of Electronics and Information Technology,2012,34(5):1120-1125.
Liu Xiaojun,Liu Congfeng,Liao Guisheng.Robust adaptive beamforming algorithm based on subspace projection method and its performance analysis[J].Systems Engineering and Electronics,2010,32(4):669-673.
Yang Zhiwei,Liao Guisheng,Zeng Cao.Robust adaptive beamforming under gain and phases error[J].Systems Engineering and Electronics,2007,29(7):1034-1036.
Zhang Xiaofei,Xu Dazhuan.Oblique projection-based beamforming algorithm[J].Journal of Electronics and Information Technology,2008,30(3):585-588.
Guo Qinghua,Liao Guisheng.A robust adaptive beamformer[J].Journal of Electronics and Information Technology,2004,26(1):146-150.
Xie Binbin,Gan Lu,Li Liping.Robust capon beamforming with orthomodular constraint[J].Journal of Electronics and Information Technology,2011,33(9):2045-2049. [15]Cox H,Zeskind R M,Owen M M.Robust adaptive beamforming[J].IEEE Transactions on Acoustics,Speech and Signal processing,1987,35(10):1365-1376.
[16]Zhi Tian,Bell K L,Van Trees H L.A recursive least squares implementation for LCMP beamforming under quadratic constraint[J].IEEE Transactions on Signal Processing,2001,49(6):1138-1145.
[17]Li Jian,Stoica P,Wang Zhisong.Doubly constrained robust capon beamformer[J].IEEE Transactions on signal processing,2004,52(9):2407-2423.
[18]Liu Congfeng,Liao Guisheng.Robust capon beamformer under norm constraint[J].Signal Processing,2010,49(6):1573-1581.
Liu Congfeng,Liao Guisheng.Robust LCMP beamformer under quadratic constraint[J].Acta Electronica Sinica,2010,38(9):1990-1996.
[20]Huang Fei,Sheng Weixing,Ma Xiaofeng,et al.Robust adaptive beamforming for large-scale arrays[J].Signal Processing,2010,90(1):165-172.


Last Update: 2013-03-25