Abstract
Recently, Wireless Body Area Network(WBAN) has drawn vast interests from researchers due to its high potential in healthcare and medical applications. In this paper, we propose and analyse the energy efficiency model of 2-hop communication in multipath fading modeled using Rician and Rayleigh distributions. In addition, the optimal packet size to maximize energy efficiency is investigated for on-body with line-of-sight(LOS) and non-line-of-sight(NLOS), and in-body channels. The modulation techniques under consideration are Binary Phase Shift Keying(BPSK) and 16-ary quadrature amplitude position modulation(QAPM). The closed-form expressions of energy efficiency models of 1-hop, cooperative and 2-hop communications are derived. We compare the numerical results of our proposed 2-hop communication with the existing 1-hop and cooperative communications. The numerical results show that for poor channel conditions, when S-D distance is greater than threshold, our proposed 2-hop communication provides the maximum energy efficiency. Moreover, 16QAPM achieves higher energy efficiency than BPSK in in-body channel regardless of communication schemes.
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