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access icon free Two layers beamforming robust against direction-of-arrival mismatch

The presence of the desired signal (DS) in the training snapshots makes the adaptive beamformer sensitive to any steering vector mismatch and dramatically reduces the convergence rate. The objective of the present study is to propose a new adaptive beamformer which is robust against direction-of-arrival (DOA) mismatch and its convergence rate is not sensitive to the presence of the DS. This method is applicable to the arrays with specific structure such as the linear array. Our approach is based on the DS elimination from the training snapshots and the sub-array beamforming technique. To accomplish this goal, a blocking matrix which converts the primary data to the DS-free data is synthesized. The Synthesis process is based on the desired degree of freedom and the uncertainty of DOA of the DS. Using the signal-free data, the beamforming vector is calculated through the presented algorithm. Owing to elimination of the DS from the training snapshots and performing the adaptive operations in the sub-array level, our algorithm has high convergence rate and excellent performance even in cases with the small sample size. Simulations show that the proposed beamformer can achieve a much better performance in terms of output SINR compared to the existing ones.

References

    1. 1)
      • 23. Takao, K., Fujita, M., Nishi, T.: ‘An adaptive antenna array under directional constraint’, IEEE Trans. Antennas Propag., 1976, AP-24, (5), pp. 662669 (doi: 10.1109/TAP.1976.1141411).
    2. 2)
      • 2. Van Trees, H.L.: ‘Optimum array processing. Part IV of detection, estimation, and modulation theory’ (Wiley, 2002).
    3. 3)
      • 16. Monzingo, R.A., Miller, T.W.: ‘Introduction to adaptive arrays’ (Wiley, 1980).
    4. 4)
      • 20. Yu, L., Liu, W., Langley, R.J.: ‘Novel robust beamformers for coherent interference suppression with DOA estimation errors’, IET Microw., Antennas Propag., 2010, 4, (9), pp. 13101319 (doi: 10.1049/iet-map.2009.0433).
    5. 5)
      • 27. Jablon, N.K.: ‘Adaptive beamforming with the generalized sidelobe canceller in the presence of array imperfections’, IEEE Trans. Antennas Propag., 1986, 34, (8), pp. 9961012 (doi: 10.1109/TAP.1986.1143936).
    6. 6)
      • 21. Lu, Z.X., Gao, M.G., Li, Y.J.: ‘Robust Capon beamformer based on direction search’, Electron. Lett., 2012, 48, (23), pp. 14721473 (doi: 10.1049/el.2012.3211).
    7. 7)
      • 24. Wu, S.Q., Zhang, J.Y.: ‘A new robust beamforming method with antennae calibration errors’. Proc. IEEE Wireless Communication Networking Conf., New Orleans, LA, September 1999, pp. 869872.
    8. 8)
      • 18. Chen, C.Y., Vaidyanathan, P.P.: ‘Quadratically constrained beamforming robust against direction-of-arrival mismatch’, IEEE Trans. Antennas Propag., 2007, 55, (8), pp. 41394150.
    9. 9)
      • 5. Gershman, A.B., Turchin, V.I., Zverev, V.A.: ‘Experimental results of localization of moving underwater signal by adaptive beamforming’, IEEE Trans. Signal Process., 1995, 43, pp. 22492257 (doi: 10.1109/78.469863).
    10. 10)
      • 25. Shahbazpanahi, S., Gershman, A.B., Luo, Z.Q., Wong, K.M.: ‘Robust adaptive beamforming for general-rank signal models’, IEEE Trans. Signal Process., 2003, 51, (9), pp. 22572269 (doi: 10.1109/TSP.2003.815395).
    11. 11)
      • 14. Hassanien, A., Vorobyov, S.A., Wong, K.M.: ‘Robust adaptive beamforming using sequential quadratic programming: an iterative solution to the mismatch problem’, IEEE Signal Process. Lett., 2008, 15, pp. 733736 (doi: 10.1109/LSP.2008.2001115).
    12. 12)
      • 15. Khabbazibasmenj, A., Vorobyov, S.A., Hassanien, A.: ‘Robust adaptive beamforming based on steering vector estimation with as little as possible prior information’, IEEE Trans. Signal Process., 2012, 60, (6), pp. 29742987 (doi: 10.1109/TSP.2012.2189389).
    13. 13)
      • 11. Carlson, B.D.: ‘Covariance matrix estimation errors and diagonal loading in adaptive arrays’, IEEE Trans. Aerosp. Electron. Syst., 1988, 24, (4), pp. 397401 (doi: 10.1109/7.7181).
    14. 14)
      • 7. Pedersen, K.I., Mogensen, P.E., Fleury, B.H.: ‘A stochastic model of the temporal and azimuthal dispersion seen at the base station in outdoor propagation environments’, IEEE Trans. Veh. Technol., 2000, 49, pp. 437447 (doi: 10.1109/25.832975).
    15. 15)
      • 19. Ye, Z., Liu, C.: ‘Non-sensitive adaptive beamforming against mutual coupling’, IET Signal Process., 2009, 3, (1), pp. 16 (doi: 10.1049/iet-spr:20070198).
    16. 16)
      • 10. Applebaum, S.P., Chapman, D.J.: ‘Adaptive arrays with main beam constraints’, IEEE Trans. Antennas Propag., 1976, AP-24, (5), pp. 650662 (doi: 10.1109/TAP.1976.1141416).
    17. 17)
      • 17. Reed, I.S., Mallett, J.D., Brennan, L.E.: ‘Rapid convergence rate in adaptive arrays’, IEEE Trans. Aerosp. Electron. Syst., 1974, AES-10, pp. 853863 (doi: 10.1109/TAES.1974.307893).
    18. 18)
      • 13. Li, J., Stoica, P., Wang, Z.: ‘On robust capon beamforming and diagonal loading’, IEEE Trans. Signal Process., 2003, 51, (7), pp. 17021715 (doi: 10.1109/TSP.2003.812831).
    19. 19)
      • 26. Lo, K.W.: ‘Improving performance of real-symmetric adaptive array by signal blocking’, IEEE Trans. Aerosp. Electron. Syst., 1995, 31, (2), pp. 821830 (doi: 10.1109/7.381928).
    20. 20)
      • 12. Vorobyov, S.A., Gershman, A.B., Luo, Z.Q.: ‘Robust adaptive beamforming using worst-case performance optimization: A solution to the signal mismatch problem’, IEEE Trans. Signal Process., 2003, 51, (2), pp. 313324 (doi: 10.1109/TSP.2002.806865).
    21. 21)
      • 6. Ringelstein, J., Gershman, A.B., Böhme, J.F.: ‘Direction finding in random inhomogeneous media in the presence of multiplicative noise’, IEEE Signal Process. Lett., 2000, 7, pp. 269272 (doi: 10.1109/97.870675).
    22. 22)
      • 8. Widrow, B., Duvall, K.M., Gooch, R.P., Newman, W.C.: ‘Signal cancellation phenomena in adaptive antennas: causes and cures’, IEEE Trans. Antennas Propag., 1982, 30, (3), pp. 469478 (doi: 10.1109/TAP.1982.1142804).
    23. 23)
      • 4. Godara, L.C.: ‘The effect of phase-shifter errors on the performance of an antenna-array beamformer’, IEEE J. Ocean. Eng., 1985, OE-10, pp. 278284 (doi: 10.1109/JOE.1985.1145105).
    24. 24)
      • 22. Yu, Z.L., Ser, W., Er, M.H.: ‘Robust adaptive beamformer with LMI constraints on magnitude response’. Proc. IEEE Int. Conf. Communications, Beijing, China, May 2008, pp. 815819.
    25. 25)
      • 9. Er, M.H., Cantoni, A.: ‘Derivative constraints for broadband element space antenna array processors’, IEEE Trans. Antennas Propag., 1983, 31, pp. 13781393.
    26. 26)
      • 3. Feldman, D.D., Griffiths, L.J.: ‘A projection approach for robust adaptive beamforming’, IEEE Trans. Signal Process., 1994, 42, pp. 867876 (doi: 10.1109/78.285650).
    27. 27)
      • 1. Godara, L.C.: ‘Application of antenna arrays to mobile communications. Part II: beam-forming and direction-arrival estimation’, Proc. IEEE, 1997, 85, (8), pp. 11951245 (doi: 10.1109/5.622504).
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