A Grassmannian codebook is a set of isotropically distributed points on the Grassmannian manifold G(k,d) such as area of a circle, surface of a sphere, etc.
The code provides the Grassmannian codebook using LBG algorithm modified using the chordal distance and the respectively computed centroid.
For more details, see attached PDF
NAVNEET GARG (2019). Grassmannian Codebook using modified LBG algorithm (https://www.mathworks.com/matlabcentral/fileexchange/72221-grassmannian-codebook-using-modified-lbg-algorithm), MATLAB Central File Exchange. Retrieved .