56 research outputs found
Cross-Layer Optimization in OFDM Wireless Communication Network
The wide use of OFDM systems in multiuser environments to overcome problem of communication
over the wireless channel has gained prominence in recent years. Cross-layer Optimization technique
is aimed to further improve the efficiency of this network. This chapter demonstrates that significant
improvements in data traffic parameters can be achieved by applying cross-layer optimization tech-
niques to packet switched wireless networks. This work compares the system capacity, delay time and
data throughput of QoS traffic in a multiuser OFDM system using two algorithms. The first algorithm,
Maximum Weighted Capacity, uses a cross-layer design to share resources and schedule traffic to users
on the network, while the other algorithm (Maximum Capacity) simply allocates resources based only
on the users channel quality. The results of the research shows that the delay time and data throughput
of the Maximum Weighted Capacity algorithm in cross layer OFDM system is much better than that of
the Maximum Capacity in simply based users channel quality system. The cost incurred for this gain is
the increased complexity of the Maximum Weighted Capacity scheme
Development of iSpeak: A voice activated Relationship Management System
A constant source of frustration for subscribers of mobile telephony in Nigeria is the quality of customer care service. The ubiquitous IVR systems deployed by service providers often ends in long and winding texting of digits that terminate in calls to agents with poor CRM attitudes. Automation of most of the functions of the human agent goes a long way in mitigating this problem. This paper describes iSpeak – a system designed to reduce the human–to–human (H2H) interaction in the complaint-lodging and solution provision process to a minimal level where it is not possible to eradicate it totally by a replacement with human–to–system (H2S) interactivity. iSpeak has an inherent capacity for improving the efficiency and drastically cutting CRM cost of corporate organizations. This comes with the attendant advantage of improved business-customer relationship.
Keywords – Automatic Speech Recognition, Customer Care Service, Speech-control, Customer Voice Model, Voice Print, Voice Recognition
Power Line Communication Technologies: Modeling and Simulation of PRIME Physical Layer
Power Line Communications is a relatively new
area of telecommunication. PLC employs full duplex methods
for transmitting data over power lines as medium of
transmission of electrical signals over a grid. PLC technologies
are used in advanced meter reading, home automation and
Public street lighting. Several PLC technologies classified
based on the operational frequency range, are explored in this
paper. PRIME is a new NBPLC system, which uses OFDM in
its physical layer, for power line communication in the last
mile. This work also focused on PRIME’s physical
specifications, which was modeled in MATLAB/SIMULINK.
In this paper, the performance of PRIME when its data is
modulated using DQPSK and 4-QAM in four (4) channel
models is shown.
Modeling and Simulation of a University LAN in OPNET Modeller Environment
Academia has peculiar networking needs that
must be satisfied for effective dissemination of knowledge.
The main purpose of a campus network is efficient resource
sharing and access to information among its users. A key
issue with designing and implementing such Local Area
Networks (LAN) is its performance under ever increasing
network traffic, and how this is affected by various network
metrics such as latency and end-to-end delay.
Implementation of network systems is a complex and
expensive task; hence network simulation has become
essential and has proven to be cost effective and highly
useful for modeling the desired characteristics and analyzing
performance under different scenarios. As well as providing
useful prognosis of future network performance based on
current expansion dynamics. We present in this paper the
simulation and analysis of the Covenant University campus
LAN in the OPNET Modeler environment
Satellite Communications: Impact on Developing Economies
Access to information and communication infrastructure greatly enhances economic growth. When a reliable and affordable medium for information exchange is available, previously unanticipated developments ensue. Most areas in developing countries are sparsely populated and highly rural. Satellite communication is an excellent option for meeting this and many other pressing communication needs of developing economies. This paper examines the impact of satellite communication on developing economies, using popular examples as case study
GLOBALIZATION AND INDUSTRIAL RELATIONS SYSTEM IN NIGERIA
Globalization has a major impact on the management of human resources in developing countries including Nigeria. With accelerating globalization, organizations have had to change and new trends have set in even in the industrial relations system and the management of human resources. The fundamental issue addressed in this paper is the extent to which Nigeria has restructured her industrial and trade systems for effective industrialisation within the on-going trade globalisation process. Globalization can therefore be said to have had a phenomenal impact on a developing economy like Kenya that is both positive and negative as explored in the paper
GLOBALIZATION AND INDUSTRIAL RELATIONS SYSTEM IN NIGERIA
Abstract: Globalization has a major impact on the management of human resources in
developing countries including Nigeria. With accelerating globalization organizations have
had to change and new trends have set in even in the industrial relations system and the
management of. .human .resources . . The fundamental .. issue . addressed. .in . this . .paper . .is .. the
extent to which Nigeria has restructured her industrial and trade systems for effective
industrialisation within the on-going trade globalisation process. Globalization can therefore
be said to have had a phenomenal impact on a developing economy like Kenya that is both
positive and negative as explored in the paper
Comparative Analysis of Scheduling Techniques in Downlink LTE Using MATLAB-Based LTE MACLAB Simulator
Traffic scheduling plays an important role in
LTE technology by assigning the shared resources among users
in the most efficient manner. This research compares the
performance of three types of scheduling algorithms namely:
Round Robin, best Channel Quality Indicator (CQI) and
Proportional Fair (PF) schedulers representing the extreme
cases in scheduling. The scheduling algorithms performances
on the downlink were measured in terms of throughput and
block error rate using a MATLAB-based system level
simulation
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