Definitions - ku-fpg/ecc-ldpc GitHub Wiki

Term Definition
Cyclic matrix Might be the same as circulant, since we only have ones and zeros
Circulant matrix Each row is a determined by circularly rotating the previous row once (so its defined entirely by its first row)
Quasi cyclic matrix Same as block circulant, since we only have ones and zeros (?)
Block circulant Composed of submatrices that are circulant matrices