Angle Estimation with Adaptive Arrays in External Noise Fields

@article{Davis1976AngleEW,
  title={Angle Estimation with Adaptive Arrays in External Noise Fields},
  author={R. C. Davis and L. E. Brennan and L E Reed},
  journal={IEEE Transactions on Aerospace and Electronic Systems},
  year={1976},
  volume={AES-12},
  pages={179-186}
}
A method of estimating the angle of arrival of a signal at an array of sensors in an external noise environment is outlined. The development is based on a maximum likelihood estimator and leads naturally to adaptive sum and difference beams which null the external noise sources. An algorithm for estimating angle of arrival, based on the outputs of adaptively distorted sum and differnce beams, is shown to perform well in the presence of sidelobe and/or main beam interference. 
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