Draft. Framework In this article, we describe and numerically emulate properties of non-direct infrared communication channel. We considered PAM, PAPM, DAPPM, DH-PIM coding schemes. Created framework and program can be a base for further research. We tried to derive all formulas from the ground; however, approaches and ideas are heavily based on works of others including works listed in "Bibliography". If you feel that a proper credit is missed, please email to us. Contents TO DO Model Description Arbitrary non-Correlated Symbols Pulse Correlation Octave-MatLab-Java Source Code Parameters to run Terminology