It looks like one of the authors in http://www.csciabs.org.cn/fujian/%E4%B8%AD%E5%9B%BD%E5%AD%A6%E6%9C%AF%E6%9C%9F%E5%88%8A%E6%96%87%E6%91%98%EF%BC%88%E8%8B%B1%E6%96%87%E7%89%88%EF%BC%892013-8%EF%BC%8811%EF%BC%89-11%E6%9C%88.pdf might have implemented it in MATLAB, so if you can find it in the Chinese and find the author and track down their email, then potentially they could send you the code.
Other than that, I find no evidence that anyone has ever implemented ABDND in MATLAB.
