| |||||||||
The tutorial is based on work carried out within a European
Cooperative projects, FISTERA, that saw the contributions and
interactions of researchers from many fields and from many centres
in the world. The objective: to provide an understanding on the
possible evolution over the next 10-15 years and its impact on
telecommunications in the large.
Software
Radio Implementation for MIMO/OFDM High-Speed Wireless LAN/MAN
with Space-Time Coding and BLAST Technologies
|
The tutorial dedicates to the cutting-edge wireless parallel transmission technologies in frequency-domain and space-domain, known as orthogonal frequency-division multiplexing (OFDM) and multiple input multiple out (MIMO) respectively, with focuses on the implementations of OFDM MIMO high-speed wireless local area network (WLAN) and wireless metropolitan area network (WMAN) prototypes on the basis of the technology of software radio.
The related technical backgrounds are briefly introduced firstly, which includes OFDM, MIMO, space-time coding, Bell laboratory layered space-time (BLAST), the IEEE 802.11a based WLAN, the IEEE 802.16 based WMAN and software radio testbed.
The tutorial then discusses the implementations of a two-transmitter tow-receiver (2x2) real-time space-time coding OFDM WLAN/WMAN prototype and a four-transmitter four-receiver (4x4) OFDM BLAST WLAN/WMAN prototype.
At First, we discuss the configuration of an up-to-date software radio testbed. The key algorithms implementations based on multiple TMS320C6701 DSPs are then presented, including QAM map/de-map, FFT/IFFT, time synchronization, frequency synchronization, channel estimation and compensation, and coding/decoding.
The prototype realizes a 30 Mb/s wireless link based on the IEEE 802.16 standard and Alamouti’s space-time diversity scheme.
Next, we present the experimental results of a four-transmitter four-receiver OFDM BLAST prototype, offering a peak date rate of 525Mb/s with a spectrum efficient of 19.2 b/Hz/s. BLAST detection algorithms, bit error rate (BER) to signal to noise ratio (SNR) curves, the impairments of carrier frequency offset, the impact on system capacity due to the degradation of MIMO channel, the error distributions and the unsymmetric MIMO configurations are discussed in details.
Software radio testbed can rapidly implement
and evaluate new algorithms and schemes, which benefits to both
academy research and product development. This tutorial is based on
our five years’ research in the software radio laboratory at Georgia
Tech and offers fundamental and helpful information for development
engineers, system engineers, technical managers, and graduate
students who are interested in the promising wireless parallel
transmission technologies.
Please click on the hyperlink below to access the Tutorial of Prof.
W. Xiang:
Software Radio Implementation for MIMO/OFDM High Speed Wireless
LAN/MAN (Top)
Broadband wireless access is the
third wireless revolution, after cellphones and Wi-Fi. It is viewed
by many carriers and cable operators as a “disruptive” technology
and rightly so. The broadcast nature of wireless transmission offers
ubiquity and immediate access for both fixed and mobile users,
clearly a vital element of next-generation quadruple play (i.e.,
voice, video, data, and mobility) services. Unlike wired access
(copper, coax, fiber), a large portion of the deployment costs is
incurred only when a subscriber signs up for service. An increasing
number of municipal governments around the world are financing the
deployment of multihop wireless networks with the overall aim of
providing ubiquitous Internet access and enhanced public services.
This tutorial will provide a comparative assessment of the key
standards and technologies underpinning promising broadband wireless
access solutions.
Please click on the hyperlink below to access the Tutorial of Prof.
B. Bing:
Broadband Wireless Access – The Next Wireless Revolution (Top)
Broadband fiber access is becoming
increasing important in USA as major service providers are gearing
to bridge the gap between world leaders in access (South Korea and
Japan) and USA. This tutorial will first review fiber access
technologies currently being deployed: passive optical networks (PONs)
including A/B PON, E-PON and G-PON; and hybrid networks having both
fiber and DSL segments. The issues of bandwidth, QoS and security
will be discussed. Next, the tutorial will review possible evolution
scenarios from hybrid PON / DSL networks to PON / wireless, pure PON,
and next-generation PON networks. In the latter group, we will cover
more powerful 10Gb/s TDM PONs and evolution toward even more
powerful WDM PONs. Special attention will be paid to graceful,
economically feasible evolutions scenarios.
This tutorial includes results of some six years of research
conducted by my group, Photonics and Networking Research Laboratory
at Stanford University. The research was conducted with a generous
support of various industrial companies (including both service
providers and equipment manufacturers) and government agencies (such
as N F).
Please click on the hyperlink below to access the Tutorial: Broadband Fiber
Access (Top)
Peer-to-Peer (P2P) systems can be
regarded as decentralized and self organizing overlay architectures,
independent of specific access networks. Self organization makes
them robust and flexible to dynamic changes without provider
interaction. Their main objective is to support to find and use
distributed resources. P2P technologies have thus received an
increased interest in academia and also in industry in different
application areas, not limited to file sharing, but also in
communication applications such as Skype. The potential of P2P is in
the realization of novel applications (user generated content,
community based services) and also in applying its principles to use
existing resources in a more clever way to save infrastructure cost.
This tutorial explains basic principles of Peer-to-Peer
communications and selected advanced issues. We first explain the
concepts and algorithms of structured and unstructured P2P systems,
which are the two main concepts used for resource lookup. Both
concepts will be explained and illustrated with examples about
analysis, traffic evaluations and applications. We further elaborate
on basic algorithms for P2P data delivery taking place after a
resource is found (example: BitTorrent). Advanced issues include
selected topics in hierarchical P2P systems, P2P applications, such
as Voice over IP systems, P2P security, and P2P for mobile
communications and mobile ad hoc networks. We conclude with a
discussion of industry perspectives on P2P.
Please click on the hyperlink below to access the Tutorial:
Peer-to-Peer Technologies for Next Generation Communication Systems
– Basic Principles and Advanced Issues of Wolfgang Kellerer (DoCoMo
Communications Laboratories Europe), Gerald Kunzmann (Technische
Universität München) & Stefan Zöls (Technische Universität München). (Top)
Broadband wireless access (BWA) is
viewed by both telephone and cable operators as a disruptive
technology and rightly so. The broadcast nature of wireless
transmission offers ubiquity and immediate access for both fixed and
mobile users, clearly a vital element of next-generation quadruple
play services involving voice, video, data, and mobility. WiMax is a
promising BWA option that includes many powerful wireless features.
This tutorial aims to provide the participant with a strong
foundation on the IEEE 802.16 standard. Topics covered include the
physical (PHY) layer, adaptive modulation and coding, OFDM and OFDMA,
multiple antenna systems, medium access control (MAC), TDD and FDD
transmission, frame formats, quality of service, security, mobility
support, deployment considerations, the WiMax Forum, ongoing 802.16
projects, and 802.16 performance evaluation using OPNET
Please click on the hyperlink below to access the Tutorial:
WiMax - Mobilizing the Internet of Benny Bing, Georgia Institute
of Technology. (Top)
Derived from a proprietary fast
packet switching technique, MPLS (Multi-Protocol Label Switching)
has played various roles throughout the years. It has been an
approach for the deployment of IP over ATM networks, a solution in
utilizing ATM hardware within IP networks, a traffic engineering
enhancement for IP, and finally a unifying control plane technology.
After presenting the basic mechanisms and operating principles of
MPLS, the tutorial discusses the two features of MPLS that make it a
particularly important technology today: traffic engineering
capability and the control plane. The limitations of IP with respect
to the realization and operation of large backbones are analyzed and
then traffic engineering features that enable MPLS to overcome such
limitations are illustrated together with their underlying
mechanisms and protocols. Concerning MPLS control plane, on the one
hand, it is well integrated with the control plane of IP, on the
other hand it is suitable for deployment on connection oriented
networks. For this reason the control plane of MPLS has become a
unifying solution for various network technologies.
Please click on the hyperlink below to access the Tutorial:
MPLS - The importance of offering the right solution at the right
moment of Mario Baldi, Politecnico di Torino (Top)
'IPTV Deployment Challenges and Opportunities',
Anurag Srivastava & Swarup Acharya, Bell Laboratories, Lucent Technologies,
IEEE Tutorial
IPTV is generating huge interest in the telecom industry lately. By offering
video over their access infrastructure, Telcos hope to match the voice, video
and data ("triple-play") offering of Cable providers. However, unlike Cable TV
systems that are typically analog broadcast transmissions, IPTV uses
IP-multicast over point-to-point hybrid Fiber/DSL infrastructure that while
enabling more efficient networks, is also causing Telcos growing pains in field
deployments.
In this tutorial, we will provide an overview of the network architectures and
will highlight the various tradeoffs (e.g., channel change latency vis-a-vis
compression technology). We will focus on hardware and software technologies
from the service provider core to the home --- multicast transport, DSL
technologies, MPEG standards and home-networking requirements such as the IPTV
set-top box. Finally, we will also review the regulatory issues faced by Telcos,
and describe the various lifestyle services such as "CallerId-on-TV" and
converged voice-video applications that provides IPTV its cutting-edge
differentiation.
Slides
Long Term Evolution (LTE) technology is the next step in the evolution of UMTS cellular networks. LTE will turn UMTS into a high-data rate, low-latency and packet-optimized mobile broadband system. The Rohde & Schwarz tutorial LTE technology and LTE test; a desk side chat will provide a comprehensive introduction to LTE technology and test requirements. The tutorial starts with some background information regarding the motivation for introducing LTE, and then gives a detailed explanation of the technology basics including physical layer parameterization, radio procedures, MIMO, and network / protocol architecture. Typical test and measurement challenges encountered during verification of chipsets, terminals and infrastructure, and network deployment are outlined as well.
PDF Version
TACS
|
Copyright © 2023
TACS
|
