|
Showing 1 - 14 of
14 matches in All Departments
This book assists readers with understanding the key aspects,
problems and solutions related to the design of proper Multiple
Access Schemes for MTC (Machine-Type Communications) and IoT
applications in 5G-and-beyond wireless networks. An overview of MTC
applications and their traffic features are also provided. In
addition, it presents a comprehensive review of MTC access schemes
including orthogonal multiple access schemes (OMA), non-orthogonal
multiple access schemes (NOMA), massive MIMO-based schemes and fast
uplink grant approaches. It also proposes efficient and
reconfigurable access schemes deploying machine learning and
optimization techniques to address the main requirements of MTC
networks. This book discusses potential research directions to
further enhance the performance of MTC access schemes. Machine-type
communications are expected to account for the dominant share of
the traffic in future wireless networks. While in traditional
wireless networks, designed for human-type communications, the
focus is on support of large packet sizes in downlink, machine-type
communication systems deal with heavy uplink traffic. This is due
to the nature of the tasks performed by machine-type communication
devices, which is mainly reporting measured data or a detected
event. Furthermore, in these networks, using the virtualization
framework, the network infrastructure can be shared between
different applications for which providing isolation is of high
importance. To support these unique characteristics of machine-type
communications, proper access schemes need to be developed, which
is the focus of this book. This book benefits advanced-level
students studying computer science and electrical engineering as a
secondary textbook and researchers working in this field. Engineers
and practitioners interested in the challenges and practical
solutions of integrating MTC in the cloud radio access network of
5G-and-beyond cellular systems will want to purchase this book as
well.
This book covers the design and optimization of hybrid RF-baseband
precoding for massive multiple-input multiple-output (MIMO)-enabled
cloud radio access networks (RANs), where use cases such as
millimeter-wave wireless backhauling, fully-loaded cellular
networks are of interest. The suitability and practical
implementation of the proposed precoding solutions for the Cloud
RAN architecture are also discussed. Novel techniques are examined
for RF precoding optimization in combination with nonlinear
precoding at baseband, and the superiority of joint RF-baseband
design is verified. Moreover, the efficacy of hybrid RF-baseband
precoding to combat intercell interference in a multi-cell
environment with universal frequency reuse is investigated, which
is concluded to be a promising enabler for the dense deployment of
base stations. This book mainly targets researchers and engineers
interested in the challenges, optimization, and implementation of
massive MIMO precoding in 5G Cloud RAN. Graduate students in
electrical engineering and computer science interested in the
application of mathematical optimization to model and solve
precoding problems in massive MIMO cellular systems will also be
interested in this book.
This book introduces the development of self-interference
(SI)-cancellation techniques for full-duplex wireless communication
systems. The authors rely on estimation theory and signal
processing to develop SI-cancellation algorithms by generating an
estimate of the received SI and subtracting it from the received
signal. The authors also cover two new SI-cancellation methods
using the new concept of active signal injection (ASI) for
full-duplex MIMO-OFDM systems. The ASI approach adds an appropriate
cancelling signal to each transmitted signal such that the combined
signals from transmit antennas attenuate the SI at the receive
antennas. The authors illustrate that the SI-pre-cancelling signal
does not affect the data-bearing signal. This book is for
researchers and professionals working in wireless communications
and engineers willing to understand the challenges of deploying
full-duplex and practical solutions to implement a full-duplex
system. Advanced-level students in electrical engineering and
computer science studying wireless communications will also find
this book useful as a secondary textbook.
There have been recent advancements in wireless network
technologies such as wireless virtualization to accommodate the
exponential growth in demand, as well as to increase energy and
infrastructure efficiencies. This SpringerBrief discusses the
user-association and resource-allocation aspects in Virtualized
Wireless Networks (VWNs) and highlights key technology innovations
to meet their requirements. Various issues in practical
implementation of VWNs are discussed along with potential
techniques such as Massive MIMO, Cloud-Radio Access Network
(C-RAN), and non-orthogonal multiple access (NOMA). This
SpringerBrief will target researchers and professionals working on
current and next-generation wireless networks. The content is also
valuable for advanced-level students interested in wireless
communications and signal processing for communications.
This book introduces the development of self-interference
(SI)-cancellation techniques for full-duplex wireless communication
systems. The authors rely on estimation theory and signal
processing to develop SI-cancellation algorithms by generating an
estimate of the received SI and subtracting it from the received
signal. The authors also cover two new SI-cancellation methods
using the new concept of active signal injection (ASI) for
full-duplex MIMO-OFDM systems. The ASI approach adds an appropriate
cancelling signal to each transmitted signal such that the combined
signals from transmit antennas attenuate the SI at the receive
antennas. The authors illustrate that the SI-pre-cancelling signal
does not affect the data-bearing signal. This book is for
researchers and professionals working in wireless communications
and engineers willing to understand the challenges of deploying
full-duplex and practical solutions to implement a full-duplex
system. Advanced-level students in electrical engineering and
computer science studying wireless communications will also find
this book useful as a secondary textbook.
This SpringerBrief presents radio resource allocation schemes for
buffer-aided communications systems over fading channels under
statistical delay constraints in terms of upper-bounded average
delay or delay-outage probability. This Brief starts by considering
a source-destination communications link with data arriving at the
source transmission buffer. The first scenario, the joint optimal
data admission control and power allocation problem for throughput
maximization is considered, where the source is assumed to have a
maximum power and an average delay constraints. The second
scenario, optimal power allocation problems for energy harvesting
(EH) communications systems under average delay or delay-outage
constraints are explored, where the EH source harvests random
amounts of energy from renewable energy sources, and stores the
harvested energy in a battery during data transmission. Online
resource allocation algorithms are developed when the statistical
knowledge of the random channel fading, data arrivals, EH processes
governing the system dynamics is unknown a-priori. This Brief
continues with a source-relay-destination communications link with
buffers available at both source and relay, as part of a multi-hop
network. Optimal resource allocation schemes for this 3-node
relaying system to maximize its effective capacity under a
delay-outage constraint are proposed, with special emphasis on
relay roles: Half-duplex (HD) or full-duplex (FD) relay operation.
With HD relay, the adaptive link selection relaying problem jointly
with both fixed and adaptive power allocation schemes is
investigated. Within each transmission frame, either the
source-relay link or the relay-destination link is selected to be
active depending on the channel conditions. With FD relay under the
presence of non-zero residual self-interference (SI). This Brief
also presents source and relay power allocation schemes for both
cases of available knowledge of the channel state information at
transmitter (CSIT): instantaneous or statistical. Professional and
researchers working in this related field and advanced-level
students in electrical or computer engineering will find the
content valuable as a reference.
This SpringerBrief focuses on the coexistence concerns emerging in
LTE networks using unlicensed frequency bands. It provides a
comprehensive review on LTE networks and their unavoidable need for
enhanced capacity to meet the demands for future applications,
including a need for low-cost options. LTE using unlicensed
frequency (U-LTE) is then introduced as the most promising
solution, and discussed from various perspectives to unveil its
benefits, challenges, and requirements for coexistence with the
widely-deployed IEEE 802.11/Wi-Fi technology. Meeting these
coexistence requirements is the most important factor for the
acceptance of U-LTE, and the majority of this brief explores the
big picture concerns and existing solutions related to
coexistence-aware medium access protocols for background knowledge.
A proposed network-aware adaptive listen-before-talk protocol is
presented and evaluated. Finally, the authors identify a number of
open technical questions and potential research issues in U-LTE.
This SpringerBrief is suitable for telecom engineers, researchers,
and academic professionals with valuable knowledge and potential
working or research directions when designing and developing medium
access protocols for next generation wireless access networks.
This SpringerBrief explores the advantage of relaying techniques in
addressing the increasing demand for high data rates and reliable
services over the air. It demonstrates how to design cost-effective
relay systems that provide high spectral efficiency and fully
exploit the diversity of the relay channel. The brief covers
advances in achievable rates, power allocation schemes, and error
performance for half-duplex (HD) and full-duplex (FD)
amplify-and-forward (AF) single-relay systems. The authors discuss
the capacity and respective optimal power allocation for a wide
range of HD protocols over static and fading channels. Then,
optimal amplification coefficients in terms of achievable rate are
presented. Chapters also examine performance with finite
constellations, including the error and diversity performance. The
brief concludes with a capacity and error performance analysis of
the FD relay mode of operation, where the residual
self-interference due to FD transmission is explicitly taken into
account. Amplify-and-Forward Relaying in Wireless Communications
reveals the benefits and challenges of relaying techniques. It is
designed for researchers and professionals in wireless
communication. This material is also appropriate for advanced-level
students in electrical engineering and computer science.
This SpringerBrief presents recent advances in the cognitive MAC
designs for opportunistic spectrum access (OSA) networks. It covers
the basic MAC functionalities and MAC enhancements of IEEE 802.11.
Later chapters discuss the existing MAC protocols for OSA and
classify them based on characteristic features. The authors provide
new research in adaptive carrier sensing-based MAC designs tailored
for OSA, which optimize spectrum utilization and ensure a peaceful
coexistence of licensed and unlicensed systems. Analytically
devised via optimization and game-theoretic approaches, these
adaptive MAC designs are shown to effectively reduce collisions
between both primary and secondary network users. Researchers and
professionals working in wireless communications and networks will
find this content valuable. This brief is also a useful study guide
for advanced-level students in computer science and electrical
engineering.
This brief presents a comprehensive review of the network
architecture and communication technologies of the smart grid
communication network (SGCN). It then studies the strengths,
weaknesses and applications of two promising wireless mesh routing
protocols that could be used to implement the SGCN. Packet
transmission reliability, latency and robustness of these two
protocols are evaluated and compared by simulations in various
practical SGCN scenarios. Finally, technical challenges and open
research opportunities of the SGCN are addressed. Wireless
Communications Networks for Smart Grid provides communication
network architects and engineers with valuable proven suggestions
to successfully implement the SGCN. Advanced-level students
studying computer science or electrical engineering will also find
the content helpful.
This SpringerBrief discusses the current research on coordinated
multipoint transmission/reception (CoMP) in wireless multi-cell
systems. This book analyzes the structure of the CoMP precoders and
the message exchange mechanism in the CoMP system in order to
reveal the advantage of CoMP. Topics include interference
management in wireless cellular networks, joint signal processing,
interference coordination, uplink and downlink precoding and system
models. After an exploration of the motivations and concepts of
CoMP, the authors present the architectures of a CoMP system.
Practical implementation and operational challenges of CoMP are
discussed in detail. Also included is a review of CoMP
architectures and deployment scenarios in the LTE-Advanced
standard. Readers are exposed to the latest multiuser precoding
designs for the CoMP system under two operating modes, interference
aware and interference coordination. Wireless Coordinated Multi
cell Systems: Architectures and Precoding Designs is a concise and
approachable tool for researchers, professionals and advanced-level
students interested in wireless communications and networks.
This SpringerBriefs is an overview of the emerging field of
wireless access and mobile network virtualization. It provides a
clear and relevant picture of the current virtualization trends in
wireless technologies by summarizing and comparing different
architectures, techniques and technologies applicable to a future
virtualized wireless network infrastructure. The readers are
exposed to a short walkthrough of the future Internet initiative
and network virtualization technologies in order to understand the
potential role of wireless virtualization in the broader context of
next-generation ubiquitous networks. Three main wireless
virtualization perspectives are explored, along with the potential
challenges and requirements of a sustainable wireless
virtualization framework. Finally, it presents an example of a
multi-perspective wireless virtualization framework. The readers
learn the latest concepts in the application of wireless
virtualization as well as its relationship with cutting-edge
wireless technologies such as software-defined radio (SDR) and
cognitive radio.
Coded-Modulation Techniques for Fading Channels provides the reader
with a sound background for the application of bandwidth-efficient
coded-modulation techniques in fading channels. The book
systematically presents recent developments in the field, which has
grown rapidly in recent years, and provides a solid frame of
reference for further research in this area. During the past decade
there has been a proliferation of research in the area of
bandwidth-efficient coded-modulation techniques. The primary
advantage of these schemes over modulation schemes employing
traditional error correcting codes is their ability to improve the
performance of the communication system without bandwidth
expansion. This property makes them a suitable choice for channels
which are limited in both power and bandwidth. A typical example of
such channels is a mobile satellite channel, where it is desired to
accommodate a large number of users in a given bandwidth with a
power which is constrained by the physical size of the satellite
and by the vehicle's antenna. Coded-Modulation Techniques for
Fading Channels is an excellent reference for researchers and
practicing engineers, and may be used as a text for advanced
courses on the subject.
Coded-Modulation Techniques for Fading Channels provides the reader
with a sound background for the application of bandwidth-efficient
coded-modulation techniques in fading channels. The book
systematically presents recent developments in the field, which has
grown rapidly in recent years, and provides a solid frame of
reference for further research in this area. During the past decade
there has been a proliferation of research in the area of
bandwidth-efficient coded-modulation techniques. The primary
advantage of these schemes over modulation schemes employing
traditional error correcting codes is their ability to improve the
performance of the communication system without bandwidth
expansion. This property makes them a suitable choice for channels
which are limited in both power and bandwidth. A typical example of
such channels is a mobile satellite channel, where it is desired to
accommodate a large number of users in a given bandwidth with a
power which is constrained by the physical size of the satellite
and by the vehicle's antenna. Coded-Modulation Techniques for
Fading Channels is an excellent reference for researchers and
practicing engineers, and may be used as a text for advanced
courses on the subject.
|
You may like...
Not available
Ab Wheel
R209
R149
Discovery Miles 1 490
|