6 results for “outage probability”

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Research ArticleOpen accessIn the keywordsPerformance Evaluation of Wireless Sensor Network Channel in Agricultural ApplicationNaseer Sabri, S. A. Aljunid, R. B. Ahmad et al.Problem statement: In this study, the behavior of small scale fading channel due to a moving sink node of a Wireless Sensor Network (WSN) or moving of surrounding objects is presented. Approach: Specifically, this research introduces the effects of multipath and scattering on the transmitted signal due to mobile sink node within forest or closed field filled of reflectors and … …American Journal of Applied Sciences, Vol. 9, Issue 1 · 24 Nov 2011 · 7,096 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsImproved Performance of Traffic Dependent Outage Rate Cellular SystemHussein M.A. Basi, M. B.R. MurthyThe designers of a mobile cellular system must evaluate the possible configurations of the system components and their characteristics in order to develop a system with greater efficiency. The useful parameters to estimate performances of the system are voice quality, frequency spectrum efficiency and grade of service (GOS). In this study, a scheme proposed to reduce the lost calls and … …Journal of Computer Science, Vol. 1, Issue 1 · 31 Mar 2005 · 6,812 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsDistributed Amplify and Forward Cooperation While Maintaining Transmission FreedomL. Chen, R. Carrasco, I. WassellProblem statement: This study proposes a novel Distributed Amplify and-Forward (DAF) cooperative scheme, achieving higher diversity order and yet maintaining the same transmission freedom as the conventional Amplify-and-Forward (AF) scheme. In the DAF scheme, a user’s transmitted symbols are partitioned into several sequences in order to be relayed by different users. Approach: In the cooperative network, each user still uses … …American Journal of Engineering and Applied Sciences, Vol. 4, Issue 4 · 2 Aug 2012 · 7,376 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsThroughput-Delay Trade-Off for Slotted Aloha Multiple Access with Capture EffectA. Chehri, P. Fortier, P. M. TardifProblem statement: Medium Access Control (MAC) protocols are one of most important research issues in communication and networking. There have been proposed several MAC protocols in wireless as well in wired networks. Approach: ALOHA-based protocol is the simplest one, being able to provide prompt access, reliable channels and support for quality of service. However its limited capacity, low throughput and … …Journal of Computer Science, Vol. 5, Issue 9 · 30 Sep 2009 · 6,918 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsA Simple Scheme for Improved Performance of Fixed Outage Rate Cellular SystemHussein M.Aziz Basi, M. B.R. MurthyThe traffic characteristic of mobile cellular systems is rather distinct from that of a fixed telephone network. However the system planning and design are still carried out with the tools of conventional traffic theory. In the recent days much work is being done in the performance evaluation of mobile or cellular communication systems in order to develop a system with … …American Journal of Applied Sciences, Vol. 1, Issue 3 · 30 Sep 2004 · 7,078 accessesView PDF Cite

Research ArticleOpen accessIn the abstractComputing Amplify-and-Forward Relay Amplification Factor to Improve Total Capacity at DestinationOlalekan Bello, Hushairi Zen, Al-Khalid Othman, Khairuddin Abdul HamidIn this study, we propose a new Amplify-and-Forward (AF) amplification factor to improve the error performances of the current AF schemes and thus enhance the total capacity at the destination terminal. The proposed scheme has two degrees of freedom, meaning that it contains two variable parameters that can simultaneously vary the amplification factor instead of one as in traditional variable-gain … …American Journal of Applied Sciences, Vol. 12, Issue 8 · 12 Sep 2015 · 7,095 accessesView PDF Cite