Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) Modulation Methods Evaluation for WBANs

Abstract

Wireless body area network (WBANs) is one of the significant area of research where low power sensor nodes have used to monitor the patient conditions. These sensor nodes are implanted on and around the patient body. The intelligent sensors measure, process and transmit human’s physiological data to a control unit without wearer’s activities constraints. Doctors access patient related data for real-time diagnosis and initiate patient’s treatment procedures. Thus providing a greater mobility and comfort to patient by allowing them freedom from hospital equipment’s that are used to monitor their conditions. WBANs promise economical, modest and autonomous ambulatory monitoring for a long time period. Ultra Wide Band (UWB) is one of the main component of WBANs due to its low power capabilities, low cost and duty cycle and high data rate. The main objective of this research is to enhance the performance of Multiband Orthogonal Frequency Division Multiplexing (MBOFDM) system. In order to enhance the MB-OFDM, study considers bit error rate, path-loss and transmission distance. MB-OFDM is a form of UWB in which data is transmitted over multiple carriers that are separated at specific frequencies. It uses Fast Forward Transform (FFT) algorithm that captures energies in a multipath environment with 100 percent efficiency, thus providing high resiliency and high spectral flexibility to the multi-path effects, interference and Radio Frequency (RF). Simulations of the proposed model are carried out in NS 2.34. The experiment results indicated the improve and better performance of MB-OFDM with maximum transmission distance.