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  author = {Kazunori Ogasawara and Shinnosuke Hirata and Hiroyuki Hachiya},
  title = {Influence of Doppler shift in ultrasonic distance and velocity measurement using M-sequence modulated signals},
  booktitle = {Proceedings of Symposium on Ultrasonic Electronics},
  year = 2012,
}

@inproceedings{CTT100608418,
  author = {小笠原一憲 and 高山潤也 and 蜂屋弘之},
  title = {コード間干渉雑音を除去した同時送波音響影像法の検討},
  booktitle = {信学技報},
  year = 2010,
}