In signal processing, direction of arrival (DOA) denotes the direction from which usually a propagating wave arrives at a point, where usually a set of sensors are located. These set of sensors forms what is called a sensor array. Often there is the associated technique of beamforming which is estimating the signal from a given direction.[1][2] Various engineering problems addressed in the associated literature are:

Advanced sophisticated techniques perform joint direction of arrival and time of arrival (ToA) estimation to allow a more accurate localization of a node. This also has the merit of localizing more targets with less antenna resources. Indeed, it is well-known in the array processing community that, generally speaking, one can resolve targets via antennas. When JADE [4][5] (joint angle and delay) estimation is employed, one can go beyond this limit.

Typical DOA estimation methods

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References

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  1. ^ Zhang, Qilin; Abeida, Habti; Xue, Ming; Rowe, William; Li, Jian (2012). "Fast implementation of sparse iterative covariance-based estimation for source localization". The Journal of the Acoustical Society of America. 131 (2): 1249–1259. Bibcode:2012ASAJ..131.1249Z. doi:10.1121/1.3672656. PMID 22352499.
  2. ^ Abeida, Habti; Zhang, Qilin; Li, Jian; Merabtine, Nadjim (2013). "Iterative Sparse Asymptotic Minimum Variance Based Approaches for Array Processing". IEEE Transactions on Signal Processing. 61 (4). Institute of Electrical and Electronics Engineers (IEEE): 933–944. arXiv:1802.03070. Bibcode:2013ITSP...61..933A. doi:10.1109/tsp.2012.2231676. ISSN 1053-587X. S2CID 16276001.
  3. ^ M. Bondarenko and V.I. Slyusar. "Influence of jitter in ADC on precision of direction-finding by digital antenna arrays. // Radioelectronics and Communications Systems. - Volume 54, Number 8, 2011.- Pp. 436 - 445.-" (PDF). doi:10.3103/S0735272711080061.
  4. ^ Vanderveen, Michaela C., Constantinos B. Papadias, and Arogyaswami Paulraj. "Joint angle and delay estimation (JADE) for multipath signals arriving at an antenna array." IEEE Communications letters 1.1 (1997): 12-14.
  5. ^ Ahmad Bazzi and Dirk Slock. "Joint Angle and Delay Estimation (JADE) by Partial Relaxation." 2019 IEEE Global Conference on Signal and Information Processing (GlobalSIP). IEEE, 2019.
  6. ^ Barabell, Arthur. "Improving the resolution performance of eigenstructure-based direction-finding algorithms." ICASSP'83. IEEE International Conference on Acoustics, Speech, and Signal Processing. Vol. 8. IEEE, 1983.