A Framework on the Performance Analysis of Cooperative Wireless Body Area Networks
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A Framework on the Performance Analysis of Cooperative Wireless Body Area Networks Ehsan Soleimani‑Nasab1 · Maryam Abbaspour1 Accepted: 29 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Wireless body area networks (WBANs) are deal with wireless networks in the human body. We describe the performance analysis of dual-hop cooperative relaying systems employing amplify-and-forward (AF) technique in WBANs over independent and nonnecessary identically distributed Gamma fading channels. More specifically, we present closed-form derivations of the outage probabilities (OP), symbol error probabilities (SEP) and ergodic capacity (EC) for fixed gain and channel state information (CSI)-assisted relaying techniques at arbitrary signal-to-noise-ratios (SNRs). We also deduce novel expressions in the high SNR region. By doing so, we can quantify the performance of system by the diversity and coding gains. Using the derived expressions as a starting point and for the case of Exponential fading, we consider three practical optimization scenarios. They are optimal relay position with fixed power allocation, power allocation under the fixed location of the relay and joint optimization of power allocation and relay position under a transmit power constraint. The Monte Carlo simulations are used to validate the accuracy of our derivations, where it is demonstrated that the proposed adaptive allocation method significantly outperforms the fixed allocation method. Keywords Wireless body area networks · Cooperative relaying · Amplify-and-forward · CSI-assisted relaying · Fixed-gain relaying
1 Introduction Wireless body area network (WBAN) is a new standard of personal communications. In a recent standard (i.e. IEEE 802.15.6), the latest protocols for short range communications near or in the human body are discussed. There are a lot of applications such as military, health care, tele-medicine and multimedia which aim to measure vital signals such as consumer fitness, blood pressure, body temperature, blood glucose, blood cholesterol and quick response in the emergency time. The increasing demands have led to increasing
* Ehsan Soleimani‑Nasab [email protected] 1
Department of Electrical and Computer Engineering, Graduate University of Advanced Technology, Kerman, P.O. Box 76315‑117, 7631818356, Iran
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research and development activities to provide new devices for the patients and elderly people to improve their quality of life [1]. Federal communications commission (FCC) has approved 2360–2400 MHz radio frequency (RF) range for WBAN. WBAN consists of some physiological sensor nodes which can implement on, around, near or within a human body. Specifically, they can sense and process the acquired data and transfer information to an access point. Since the range of these devices is limited, multi-hop cooperative communications through wireless links with a personal device such as personal smart phone is of most interest [
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