Download or read book Performance Analysis of Cooperative Communication with SSK Modulation and RF Energy Harvesting written by Hemanta Kumar Sahu and published by . This book was released on 2024-02-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diving into the cutting-edge realm of wireless communication, "Harvesting Signals" offers a meticulous exploration of the synergistic potential between cooperative communication, Space Shift Keying (SSK) modulation, and Radio Frequency (RF) energy harvesting. In a landscape where the demand for efficient wireless networks is ever-growing, this book presents a groundbreaking investigation into the fusion of cooperative strategies with advanced modulation techniques, promising not only enhanced spectral efficiency but also sustainable energy utilization through RF energy harvesting. Authored by leading experts in the field, this comprehensive analysis delves into the theoretical foundations, practical implementations, and performance evaluations of cooperative communication systems employing SSK modulation and RF energy harvesting. Through a blend of rigorous mathematical frameworks and practical insights, readers are guided through the intricacies of system design, resource allocation, and optimization strategies. From theoretical derivations to real-world experimentation, "Harvesting Signals" offers a roadmap for researchers, engineers, and students alike to navigate the complexities of next-generation wireless networks. Whether seeking to optimize spectral efficiency, extend network lifetime, or minimize energy consumption, this book serves as an indispensable resource in unlocking the full potential of cooperative communication combined with SSK modulation and RF energy harvesting. Prepare to embark on a journey into the forefront of wireless communication research, where innovation meets sustainability, and where the pursuit of performance leads to the harvesting of signals.

Download or read book Resource Allocation and Performance Analysis for Wireless Communication Systems with Radio Frequency Energy Harvesting written by Yanjie Dong and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Analysis of Cooperative Communication Systems with Hierarchical Modulation Over AWGN Channel and Rayleigh Fading Channels written by and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Analysis of Cooperative Communication Protocols written by Rahat Ali Khan Langah and published by LAP Lambert Academic Publishing. This book was released on 2012-07 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the rapid growth of multimedia services, future generations of cellular communications require higher data rates and a more reliable transmission link while keeping satisfactory quality of service. In this respect, multiple input multiple-output (MIMO) antenna systems have been considered as an efficient approach to address these demands by offering significant multiplexing and diversity gains over single antenna systems without increasing requirements on radio resources such as bandwidth and power. Although MIMO systems can unfold their huge benefit in cellular base stations, they may face limitations when it comes to their deployment in mobile handsets. This work is based on cooperative communications in wireless networks. We focus on Bit error rate (BER) performance analysis of cooperative communications with either an amplify-and-forward (AF) or decode-and-forward (DF) cooperation protocol using Matlab. We consider the single and multi relay scenario in our simulations.

Download or read book Performance Analysis of Hybrid Optical Wireless and Radio Frequency Communication Systems written by Tamer Rakia and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we analyze the performance of heterogeneous wireless communication systems that are composed of Optical Wireless Communication (OWC) and Radio Frequency (RF) systems. OWC systems further include long range outdoor Free Space Optical (FSO) systems and short range indoor Visible Light Communication (VLC) systems. Hybrid FSO/RF systems have emerged as a promising solution for high data rate wireless transmissions. Various transmission schemes including switch-over and soft-switching had been presented for hybrid FSO/RF systems. To overcome the drawbacks of existing schemes, we present a new transmission strategy for hybrid FSO/RF systems exploring an adaptive combining technology. This new strategy shows an improved outage performance. Typically, when the transmitter and the receiver are provided with channel state information, the transmission schemes can be adaptively designed allowing the channel to be used more efficiently. We present two new joint adaptive transmission schemes for hybrid FSO/RF systems. The first one is joint adaptive modulation and adaptive combining scheme which improves the spectral efficiency of hybrid FSO/RF systems. The other one is joint power adaptation and adaptive combining scheme which improves the throughput and the outage performance of hybrid FSO/RF systems. We accurately evaluate the performance of both schemes.FSO technology can be used effectively in multiuser scenarios to support Point-to-Multi-Point (P2MP) networks. In P2MP networks, FSO links are used for data transmission from a central location to multiple users. In this thesis, we present a new P2MP network based on hybrid FSO/RF transmission system. A common backup RF link is used by the central station for data transmission to any user in case of the failure of its corresponding FSO link. Based on a Markov Chain formulation, we study the performance of the resulting system. P2MP Hybrid FSO/RF network achieves considerable performance improvement over the P2MP FSO-only network. In VLC, Light Emitting Diode (LED) is used for the purpose of simultaneous illumination and data communication at high data rate. However, the light originating from a LED source is naturally confined to a small area and is susceptible to blockages. Hybrid VLC/RF systems have been emerged as a promising solution to provide enhanced communication coverage. We introduce a new dual-hop VLC/RF system with energy harvesting relay to extend the coverage of indoor wireless system based on VLC. The second-hop RF transmission uses the harvested energy over the first-hop VLC transmission. In this thesis, we propose two different approaches for energy harvesting at the relay terminal. In the first approach, the relay harvests light energy from different artificial light sources and sunlight entering the room. In this approach, we propose a novel statistical model for the harvested electrical power and analyze the probability of data packet loss. In the second approach, the relay harvests energy from the VLC link by extracting the direct current component of the received optical signal. In this approach, we investigate the optimal design of the hybrid VLC/RF system in terms of data rate maximization. In both cases, we present extensive numerical examples to define important design guide lines for VLC/RF systems.

Download or read book Performance Analysis of Cooperative Communication Systems with Imperfect Channel State Information written by Mohammad Jafar Taghiyar Renani and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space-time coding has demonstrated that the deployment of multiple antennas at the transmitter allows for simultaneous increase in throughput and reliability. However, the use of antenna arrays is impractical for deployment in some practical scenarios. Therefore, cooperative diversity has been recently introduced for realizing transmit diversity. Most of the literature in cooperative diversity assume perfect channel state information (CSI). However, in practice, imperfect CSI should be considered. In this thesis, we first investigate the performance of cooperative communications with imperfect CSI, where the channel estimates are obtained by pilot symbols. We present an exact bit error probability expression in the presence of channel estimation errors. We also study the effect of imperfect CSI in two-way multi-relay cooperative networks when the max-min relay selection is used. We derive an exact expression for the outage probability based on which a novel optimum power allocation scheme is proposed.

Download or read book Optimal Energy Management Strategies in Wireless Data and Energy Cooperative Communications written by Jun Zhou and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis first presents a new cooperative wireless communication network strategy that incorporates energy cooperation and data cooperation. The model establishment, design goal formulations, and algorithms for throughput maximization of the proposed protocol are presented and illustrated using a three-node network with two energy harvesting (EH) user nodes and a destination node. Transmission models are established from the performance analysis for a total of four scenarios. Based on the models, we seek to find optimal energy management strategies by jointly optimizing time allocation for each user, power allocations over these time intervals, and data throughputs at user nodes so as to maximize the sum-throughput or, alternatively, the minimum throughput of the two users in all scenarios. An accelerated Newton barrier algorithm and an alternative algorithm based on local quadratic approximation of the transmission models are developed to solve the aforementioned optimization problems. Then the thesis extends the cooperative strategy to multi-source wireless communication network, where N source users communicate with the destination via one relay that harvests energy from the RF signals transmitted by the sources through time-division multiple access (TDMA). We characterize the Energy-Throughput (E-T) tradeoff regions between the maximum achievable average throughput of the sources and the total amount of saved energy in three circumstances. For the case N=1, all harvested energy will be used to forward the message. For the case N>1, we compare two transmission strategies: one is common PS ratio strategy that the relay adopts the same PS ratio for all sources; the other is individual PS ratio strategy that each source uses an individual PS ratio. Numerical experiments under practical settings provide supportive evidences to our performance analysis.

Download or read book Design and Performance Analysis of Efficient Cooperative Wireless Communication Systems written by Essam Saleh Altubaishi and published by . This book was released on 2012 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooperative communication has recently become a key technology for modern wireless networks such as 3GPP long-term evolution and WiMAX, because in such networks the transmission rate, the communication reliability, and coverage problems could be improved in a cost-effective manner. This, however, faces many design challenges. First, cooperative transmission typically involves a relaying phase which requires extra resources. This may cause a reduction in the spectral efficiency. Second, extra control signaling increases the complexity of operation, which may limit practical implementation. In addition, a wireless channel is time-varying, mainly due to the multipath propagation. As a result, a careful design of efficient cooperative communication systems is required, not only to enhance the spectral efficiency and maintain the quality-of-service (QoS), but also to be practical. In this dissertation, we aim to address the challenges imposed by cooperative communication and wireless transmission, and design the efficient and distributed systems which can be practically implemented in existing wireless systems. The research work is divided into two main topics: 1) adaptive cooperative wireless systems with variable-rate transmission, and 2) cooperative wireless systems with a power consumption constraint. The first topic investigates how the spectral efficiency of cooperative wireless communication systems can be improved while maintaining the QoS in terms of bit error rate and outage probability. The spectral efficiency enhancement is achieved by using three techniques: adaptivity over the relay node (i.e., relay node is active or not), adaptivity over the modulation mode, and relay selection. Based on that, we propose several adaptive cooperative schemes for both the decode-and-forward (DF) and amplify-and-forward (AF) protocols. To evaluate these schemes, we provide performance analysis in terms of average spectral efficiency, average bit error rate (ABER), and outage probability over Rayleigh fading channels. We start with the single-relay cooperative system using DF protocol, in which two adaptive cooperative schemes with variable-rate transmission are proposed. The first scheme, called the minimum error rate scheme (MERS), aims to exploit the transmit diversity to improve the bit error rate. By trading the multiplexing gain against the diversity gain, we propose the second scheme, called the maximum spectral efficiency scheme (MSES), in which cooperative transmission is avoided whenever it is not beneficial. The MERS improves the ABER significantly and achieves equal or better average spectral efficiency compared to the fixed (i.e., non-adaptive) relaying scheme. In contrast, the MSES provides the best average spectral efficiency due to its ability to not only adapt to the channel variation but also to switch between cooperative and non-cooperative transmissions. To further increase the spectral efficiency, we then propose the third scheme, called variable-rate based relay selection (VRRS) scheme, in which a relay node is selected from among the available relay nodes, based on a predefined criterion. Furthermore, we propose two AF adaptive cooperative schemes, mainly to enhance the spectral efficiency. In the first scheme, we introduce a generalized switching policy (GSP) for a single-relay cooperative wireless system that exploits the variable-rate transmission and useful cooperative regions. The second scheme, called the AF efficient relay selection (AFERS) scheme, extends the GSP to also consider the relay selection technique. Analytical and simulation results verify that the AFERS scheme not only outperforms conventional direct transmission in terms of the average spectral efficiency, but also the AF fixed relaying and the outage-based AF adaptive cooperative scheme. The second topic investigates the fair power consumption of the relay nodes for AF cooperative wireless communication systems. The fairness is defined as to achieve equal power consumption over the relay nodes. We focus on how the relay selection process can be controlled in a distributed manner so that the power consumption of the relay nodes can be included in relay selection. We first introduce a simple closed-form expression for the weight coefficient used in order to achieve the considered fairness that depends only on the local average channel conditions of the relay path. We then derive closed-form expressions of the weighted outage probability and ABER and show that our proposed strategy not only has less complexity than the conventional centralized one but also provides better accuracy in distributing the total consumed power equally among the relay nodes without affecting the performance.

Download or read book Performance Analysis of Cooperative Communication Systems written by Hafiz Yasar Lateef and published by . This book was released on 2011 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Analysis for Cooperative Wireless Communications written by Kezhi Wang and published by . This book was released on 2014 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Analysis of Cooperative Time reversal Communication written by Kyle Hai Huang and published by . This book was released on 2006 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wireless Cooperative Networks with Differential Modulation written by Woong Cho and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: In wireless cooperative networks, virtual antenna arrays formed by distributed network nodes can provide cooperative diversity. Obviating channel estimation, differential schemes have long been appreciated in conventional multi-input multi-output (MIMO) communications. However, distributed differential schemes for general cooperative network setups have not been thoroughly investigated. In this dissertation, we develop and analyze distributed differential schemes using two conventional relaying protocols, decode-and-forward (DF) and amplify-and-forward (AF), and space-time coding (STC)-based relaying protocol with an arbitrary number of relays. For each protocol, we analyze the error performance and consider the resource allocation as a two-dimensional optimization problem: energy optimization, location optimization, and joint energy-location optimization. We first derive an upper bound of the error performance for the DF system, the approximated error performance for the AF system, and an upper bound for the STC-based system at reasonably high SNR, respectively. Based on these results, we then develop the energy optimization and relay location optimization schemes that minimize the average system error. Analytical and simulated comparisons confirm that the optimized systems provide considerable improvement over unoptimized ones, and that the minimum error can be achieved via the joint energy-location optimization. We compare the results of optimization and the effects of different relaying protocols and obtain several interesting results. In addition, the comparison between the conventional system and STC-based system is addressed.

Download or read book Wireless powered Cooperative Communications written by Henry Chen and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cooperative Energy harvesting Communication Systems written by Arin Minasian and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Space time Wireless Channels written by Gregory David Durgin and published by Prentice Hall Professional. This book was released on 2003 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential aid for any engineer working in the field of next-generation wireless, this handbook provides well illustrated examples and noteboxes for difficult concepts. Perfect for the practicing engineer complete with problem sets and real-world implementations.

Download or read book Fundamentals of Wireless Communication written by David Tse and published by Cambridge University Press. This book was released on 2005-05-26 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook takes a unified view of the fundamentals of wireless communication and explains cutting-edge concepts in a simple and intuitive way. An abundant supply of exercises make it ideal for graduate courses in electrical and computer engineering and it will also be of great interest to practising engineers.

Download or read book Triboelectric Nanogenerators written by Zhong Lin Wang and published by Springer. This book was released on 2016-08-17 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces an innovative and high-efficiency technology for mechanical energy harvesting. The book covers the history and development of triboelectric nanogenerators, basic structures, working principles, performance characterization, and potential applications. It is divided into three parts: Part A illustrates the fundamental working modes of triboelectric nanogenerators with their prototype structures and theoretical analysis; Part B and Part C introduce two categories of applications, namely self-powered systems and self-powered active sensors. The book will be an ideal guide to scientists and engineers beginning to study triboelectric nanogenerators or wishing to deepen their knowledge of the field. Readers will be able to place the technical details about this technology in context, and acquire the necessary skills to reproduce the experimental setups for fabrication and measurement.