A novel chaotic modulation approach of packaged antenna for secured wireless medical sensor network in E‐healthcare applications

Abstract

This article first time reports the chaotic modulation approach toward RF signal processing for secured wireless medical sensor network (WMSN) in E‐healthcare applications. A Lorenz based chaotic modulation approach is implemented which provides lowest bit error rate (BER). The definite analytical expressions for BER in a differential chaos‐shift keying (DCSK) modulation scheme is derived and it predicted good correlation between simulated and theoretical. It is observed that proposed Lorenz chaos‐based DCSK modulation scheme is a potential candidate to provide high security in the patient data for WMSN. An off‐body UWB slotted antenna is designed which could avoid limitation of short‐range distance like implanted ones. The entire work includes numerical, simulated and experimental data in three phases. In first phase, Lorenz chaotic oscillator with electronics compatibility is executed which acts as data acquisition unit and demonstrates two‐dimensional and three‐dimensional chaos attractors. While in the second phase, analysis of BER achieves value of less than 10−4 by providing pseudorandom bit sequence at 5 Gb/s. A chaos modulated envelope using Lorenz based DCSK modulation is obtained by delay element γ. Finally, the third phase is designed on‐wafer off‐body antenna and demonstrates 3.1 to 10.6 GHz UWB toward RF signal processing in E‐healthcare applications.