Power optimization of invivo sensor node operating at terahertz band using PSO

Abstract

The invivo nano-communication links at terahertz (THz) frequencies needs high transmit power because signal suffers radio propagation losses through biological tissues. Less power is received by on body receiving node due to the absorption noise inside the human body. Transmit power of an invivo sensor node needs to be minimized as high transmit power is harmful for biological tissues present inside human body. This paper has been devised with the aim to optimize (using PSO) the transmitted power of invivo sensor node operating at terahertz band. Influence of blood, skin and fat on the communicating signal in invivo communication network has been modelled to critically compare diverse modulation schemes (MFSK, MPSK, and OOK) and compute received power by an on body sensor node. Threshold distance between two communicating nodes is computed using eigen values and is further used as a constrain for PSO to optimize transmitted power of invivo sensor node.