Channel Modeling for Nanoscale Communications and Networking

Molecular absorption is a process in which the electromagnetic energy is partially transformed to the kinetic energy internal to vibrating molecules, which can be described by the absorption coefficient. The noise in the terahertz band is primarily contributed by the molecular absorption noise. This kind of noise is caused by vibrating molecules, which partially reradiate the energy that has been previously absorbed. The obtained information rate indicates that complex tasks can be completed in the envisioned nano-communication inside the human body by the high ability of successfully transmitting information over the communication channel. Different power allocations schemes are considered to obtain signal-to-noise ratio (SNR) and the information rate of the single used cases for the nano-communication inside human tissues and the properties of time spread on-off keying communication scheme. The channel noise is dominantly contributed by the self-induced noise and is dependent on the transmitted signal power allocation schemes, which motivates the investigation of SNR on different transmitted power schemes.