Finite Data Performance Analysis of Mvdr Antenna Array Beamformers with Diagonal Loading

Diagonal loading has been regarded as an e-cient manner to tackle the flnite sample efiect or the steering vector imprecision problem on adaptive array beamforming. However, the reason of the robustness improvement by the loading factor is still unknown and rarely discussed. In this paper, we consider the flnite sample efiect and derive the approximated output signal-to-interference-plus-noise ratio (SINR) of minimum variance distortionless response (MVDR) beamformers with diagonal loading. The obtained SINR expression is more explicit and compact than the existing formulas in the literature. Based on the theoretical results, we investigate the efiects of a loading factor on the output SINR of MVDR beamformers. The theoretical analysis shows the efiectiveness of diagonal loading on alleviating flnite sample efiect. Moreover, the price of using diagonal loading is also discussed. Simulation results are presented for conflrming the validity of the research work.

[1]  Randolph L. Moses,et al.  Analysis of modified SMI method for adaptive array weight control , 1989, IEEE Trans. Signal Process..

[2]  Cheng-Chou Lee,et al.  Analysis of the performance and sensitivity of an eigenspace-based interference canceler , 2000 .

[3]  W. Gabriel,et al.  Using spectral estimation techniques in adaptive processing antenna systems , 1985 .

[4]  A. Elnashar,et al.  Further Study on Robust Adaptive Beamforming With Optimum Diagonal Loading , 2006, IEEE Transactions on Antennas and Propagation.

[5]  Mati Wax,et al.  Performance analysis of the minimum variance beamformer in the presence of steering vector errors , 1996, IEEE Trans. Signal Process..

[6]  P. Stoica,et al.  Robust Adaptive Beamforming , 2013 .

[7]  Xavier Mestre,et al.  Finite sample size effect on minimum variance beamformers: optimum diagonal loading factor for large arrays , 2006, IEEE Transactions on Signal Processing.

[8]  Olivier Besson,et al.  Performance analysis of beamformers using generalized loading of the covariance matrix in the presence of random steering vector errors , 2005, IEEE Transactions on Signal Processing.

[9]  L. B. Fertig,et al.  Statistical performance of the MVDR beamformer in the presence of diagonal loading , 2000, Proceedings of the 2000 IEEE Sensor Array and Multichannel Signal Processing Workshop. SAM 2000 (Cat. No.00EX410).

[10]  K. S. Chen,et al.  ROBUST ADAPTIVE BEAMFORMING BASED ON PAR- TICLE FILTER WITH NOISE UNKNOWN , 2009 .

[11]  Jian Li,et al.  Fully automatic computation of diagonal loading levels for robust adaptive beamforming , 2008, 2008 IEEE International Conference on Acoustics, Speech and Signal Processing.

[12]  Jian Li,et al.  On robust Capon beamforming and diagonal loading , 2003, IEEE Trans. Signal Process..

[13]  Mati Wax,et al.  Performance analysis of the minimum variance beamformer , 1995, 1995 International Conference on Acoustics, Speech, and Signal Processing.

[14]  Bernard Widrow,et al.  Signal cancellation phenomena in adaptive antennas: Causes and cures , 1982 .

[15]  O. L. Frost,et al.  An algorithm for linearly constrained adaptive array processing , 1972 .

[16]  B. Carlson Covariance matrix estimation errors and diagonal loading in adaptive arrays , 1988 .

[17]  R.C. Johnson,et al.  Introduction to adaptive arrays , 1982, Proceedings of the IEEE.

[18]  LiWu Chang,et al.  Performance of DMI and eigenspace-based beamformers , 1992 .

[19]  M. W. Ganz,et al.  Convergence of the SMI and the diagonally loaded SMI algorithms with weak interference (adaptive array) , 1990 .

[20]  Alexander M. Haimovich,et al.  An eigenanalysis interference canceler , 1991, IEEE Trans. Signal Process..

[21]  I. Reed,et al.  Rapid Convergence Rate in Adaptive Arrays , 1974, IEEE Transactions on Aerospace and Electronic Systems.

[22]  Jing Gu,et al.  Robust adaptive beamforming using variable loading , 2006, Fourth IEEE Workshop on Sensor Array and Multichannel Processing, 2006..

[23]  O. HENRICI,et al.  The Calculus for Engineers , 1897, Nature.

[24]  Ju-Hong Lee,et al.  Finite Data Performance Analysis of Lcmv Antenna Array Beamformers with and Without Signal Blocking , 2012 .

[25]  David G. Long,et al.  Array signal processing , 1985, IEEE Trans. Acoust. Speech Signal Process..

[27]  I. S. Sominskiĭ The method of mathematical induction , 1961 .

[28]  K. Senne,et al.  Adaptive array principles , 1983, IEEE Antennas and Propagation Society Newsletter.

[29]  Ju-Hong Lee,et al.  Performance Analysis of Antenna Array Beamformers with Mutual Coupling Effects , 2011 .

[30]  Zhiguo Shi,et al.  Robust Adaptive Beamforming for Steering Vector Uncertainties Based on Equivalent DOAs Method , 2008 .

[31]  Wenlong Liu,et al.  An Efficient Method to Determine the Diagonal Loading Factor Using the Constant Modulus Feature , 2008, IEEE Transactions on Signal Processing.

[32]  Stephen P. Boyd,et al.  Robust minimum variance beamforming , 2005, IEEE Transactions on Signal Processing.