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Performance Analysis of Encrypted Color Image in a D-BLAST Aided LDPC Encoded MC-CDMA Wireless Communication System
Tonusree Saha,
Md. Sarwar Hosain,
Shafi Ahmed Istiaq
Issue:
Volume 4, Issue 2, November 2016
Pages:
13-20
Received:
6 October 2016
Accepted:
2 November 2016
Published:
16 December 2016
DOI:
10.11648/j.net.20160402.11
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Abstract: In this paper, a comprehensive MATLAB simulation based study has been presented for the performance evaluation of LDPC encoded MC-CDMA wireless communication system. The investigated system implements various signal detection techniques such as Minimum mean square error (MMSE), Zero-Forcing (ZF), Zero-Forcing successive interference cancellation (ZF-SIC) Minimum mean square error successive interference cancellation (MMSE-SIC) under different digital modulation schemes (QPSK, DPSK, QAM). Simulation results show that the system shows quite satisfactory and robust performance under scenario of MMSC-SIC signal detection and QAM digital modulation schemes.
Abstract: In this paper, a comprehensive MATLAB simulation based study has been presented for the performance evaluation of LDPC encoded MC-CDMA wireless communication system. The investigated system implements various signal detection techniques such as Minimum mean square error (MMSE), Zero-Forcing (ZF), Zero-Forcing successive interference cancellation (Z...
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Balanced Multicast Routing Performance in Autonomous Sensor Networks
Abdelrahman S. Halawa,
Salah M. Abdel-Mageid
Issue:
Volume 4, Issue 2, November 2016
Pages:
21-33
Received:
11 October 2016
Accepted:
2 November 2016
Published:
21 December 2016
DOI:
10.11648/j.net.20160402.12
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Abstract: Wireless sensor networks (WSNs) are almost autonomous and dynamic network consisting of a number of wireless nodes with limited energy. Accordingly, multicast routing protocols for WSNs encounter many challenges such as energy limitation, limited bandwidth, and self-configuration when producing multi-hop routes. Most existing multicast routing protocols are designed for ad hoc networks which maximize network throughput regardless energy consumption. However, multicast routing protocols for WSNs must consider the trade-off between minimizing energy consumption and maximizing network throughput. In this paper, balancing multicast routing metrics is considered for WSNs in which the route selection is based on nodes’ remaining energy and hop count metrics. In addition, the advisor node of a multicast group is periodically changed every predefined time interval to achieve more energy balancing., The performance of the proposed scheme is evaluated and compared with the existing multicast routing protocols using NS2 in terms of network lifetime, network throughput, packet delivery ratio, end-to-end delay and network control overhead which the impact of traffic load, node density, noise level, and mobility models are taken into account. The results show that the performance of the proposed scheme is better than the performance of existing schemes.
Abstract: Wireless sensor networks (WSNs) are almost autonomous and dynamic network consisting of a number of wireless nodes with limited energy. Accordingly, multicast routing protocols for WSNs encounter many challenges such as energy limitation, limited bandwidth, and self-configuration when producing multi-hop routes. Most existing multicast routing prot...
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A Fuzzy QoS Optimization Method with Energy Efficiency for the Internet of Vehicles
Shaoqi Hu,
Hongmei Fan,
Zhende Wang,
Zhengying Cai
Issue:
Volume 4, Issue 2, November 2016
Pages:
34-44
Received:
27 October 2016
Accepted:
17 November 2016
Published:
26 December 2016
DOI:
10.11648/j.net.20160402.13
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Abstract: Energy efficiency plays an important role in the Internet of vehicles, but it is very difficult to fit the need of QoS (Quality of Service) and energy efficiency at the same time. Here a QoS order is proposed for the Internet of vehicles. First, the multi attribute decision making of QoS in the Internet of vehicles is illustrated here. Then a QoS optimization with energy efficiency is set up to seek prior choice. Second, regarding uncertain attributes to the QoS optimization, a fuzzy QoS tool is introduced to optimize its performance. Third, a comprehensive experimental analysis of fuzzy QoS results is presented to verify its effectiveness and compare with other references. Last, some interesting conclusions and future research work are indicated at the end of the paper.
Abstract: Energy efficiency plays an important role in the Internet of vehicles, but it is very difficult to fit the need of QoS (Quality of Service) and energy efficiency at the same time. Here a QoS order is proposed for the Internet of vehicles. First, the multi attribute decision making of QoS in the Internet of vehicles is illustrated here. Then a QoS o...
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Kenya Towards Mobile Virtue Network Operator: Opportunities and Challenges
Tirus Muya Maina,
Charity Mweru Maina
Issue:
Volume 4, Issue 2, November 2016
Pages:
45-51
Received:
26 August 2016
Accepted:
5 September 2016
Published:
27 December 2016
DOI:
10.11648/j.net.20160402.14
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Abstract: This paper points to the necessity to conduct research on Kenya towards Mobile Virtue Network Operator in regard to Opportunities and challenges. The telecommunication and financial business model is shifting away from full vertical integration of the operator’s value chain towards a higher level of specialization. Thus the threshold of becoming a mobile operator is dramatically reduced with the introduction of the MVNO’s concept. It is possible to be an operator without having to invest in frequency spectrum license or in wireless network infrastructure and without having to build up competence in wireless technologies. The regulators have applauded the new players because they want to enhance competition for the benefit of the customers. MNOs use underutilized spectrum in various service provisions bringing in specialization in areas such as data and mobile money. Business competition makes the consumers enjoy benefits from low fees in mobile money, text and voice services. Kenya lack of legal provision for infrastructure sharing, leaving the operators to consent to autonomous agreements with interested parties. Issues raised by MNO include Cannibalization of the MNOs market share by MVNOs, Hostile response from poor MVNO performance, unfriendly choice of MVNOs for partnering purpose. The purpose of the regulator should be increased competition in the mobile communications market, financial and quickening the improvement and the development of new services and technical innovations. Therefore, the entry of MVNOs into the market should be seen as an opportunity that will increase the uptake of mobile services in key segments such as mobile commerce, finance, voice and data.
Abstract: This paper points to the necessity to conduct research on Kenya towards Mobile Virtue Network Operator in regard to Opportunities and challenges. The telecommunication and financial business model is shifting away from full vertical integration of the operator’s value chain towards a higher level of specialization. Thus the threshold of becoming a ...
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