采用映射几何方法构造结构化二元LDPC码-Using the projective geometrically configured structured LDPC code two yuan

Projective geometry (2D, 3D), Parameter estimation, Algorithm evaluation.

椭球坐标与高斯投影面坐标系的正反算，为解决坐标系的投影转换。(The positive and negative calculation of ellipsoidal coordinates and gaussian projective plane coordinates.To solve the projection transformation of the coordinate system)