How to design a delay-and-sum beamformer for rigid rotationally symmetric arrays?

Karim Helwani, Sascha Spors, Herbert Buchner. How to design a delay-and-sum beamformer for rigid rotationally symmetric arrays?. In Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers, ACSCC 2012, Pacific Grove, CA, USA, November 4-7, 2012. pages 203-206, IEEE, 2012. [doi]

@inproceedings{HelwaniSB12,
  title = {How to design a delay-and-sum beamformer for rigid rotationally symmetric arrays?},
  author = {Karim Helwani and Sascha Spors and Herbert Buchner},
  year = {2012},
  doi = {10.1109/ACSSC.2012.6488990},
  url = {http://dx.doi.org/10.1109/ACSSC.2012.6488990},
  researchr = {https://researchr.org/publication/HelwaniSB12},
  cites = {0},
  citedby = {0},
  pages = {203-206},
  booktitle = {Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers, ACSCC 2012, Pacific Grove, CA, USA, November 4-7, 2012},
  publisher = {IEEE},
  isbn = {978-1-4673-5050-1},
}