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RISS 인기검색어
- 검색키워드
- 저자 : Nabil Alrajeh (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
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The Robustness of Coding and Modulation for Body-Area Networks
Ezio Biglieri,Nabil Alrajeh 한국통신학회 2014 Journal of communications and networks Vol.16 No.3
We consider transmission over body area networks. Dueto the difficulty in assessing an accurate statistical model valid formultiple scenarios, we advocate a system design technique favoringrobustness.Our approach, which is based on results in [12] andgeneralizes them, examines the variation of a performance metricwhen the nominal statistical distribution of fading is replacedby the worst distribution within a given Kullback–Leibler divergencefrom it. The sensitivity of the performance metric to the divergencefrom the nominal distribution can be used as an indicationof the design robustness. This concept is applied by evaluatingthe error probability of binary uncoded modulation and the outageprobability—the first parameter is useful to assess system performancewith no error-control coding, while the second reflects theperformance when a near-optimal code is used. The usefulness ofchannel coding can be assessed by comparing its robustness withthat of uncoded transmission.
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Prioritized Resource Allocation in Wireless Spectrum Pooling
Biglieri, Ezio,Lozano, Angel,Alrajeh, Nabil The Korea Institute of Information and Commucation 2012 Journal of communications and networks Vol.14 No.5
A standard paradigm for the allocation of wireless resources in communication demands symmetry, whereby all users are assumed to be on equal footing and hence get equal shares of communication capabilities. However, there are situations in which "prime users" should be given higher priority, as for example in the transmission of emergency messages. In this paper, we examine a prioritization policy that can be implemented at the physical layer. In particular, we evaluate the performance of a prioritized transmission scheme based on spectrum pooling and on the assignment of higher signal-to-noise ratio channels to higher-priority users. This performance is compared to that of unprioritized (or "symmetric") schemes, and the impact of prioritization on the unprioritized users is discussed.
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Interference Priority: A New Scheme for Prioritized Resource Allocation in Wireless
Lozano, Angel,Biglieri, Ezio,Alrajeh, Nabil The Korea Institute of Information and Commucation 2012 Journal of communications and networks Vol.14 No.5
A standard paradigm for the allocation of wireless resources in communication demands symmetry, that is, all users are assumed to be on equal footing and hence get equal shares of the system's communication capabilities. However, there are situations in which "prime users" should be given priority, as for example in the transmission of emergency messages. We examine prioritization policies that could be implemented at the physical layer and propose a new one, termed interference priority (IP), which is shown to have excellent performance. We evaluate the performance of these prioritization techniques both in controlled settings and within the context of a full cellular system and discuss the impact of prioritized use of resources on the unprioritized users.
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Prioritized Resource Allocation inWireless Spectrum Pooling
Ezio Biglieri,Angel Lozano,Nabil Alrajeh 한국통신학회 2012 Journal of communications and networks Vol.14 No.5
A standard paradigm for the allocation of wireless resources in communication demands symmetry, whereby all users are assumed to be on equal footing and hence get equal shares of communication capabilities. However, there are situations in which “prime users” should be given higher priority, as for example in the transmission of emergency messages. In this paper, we examine a prioritization policy that can be implemented at the physical layer. In particular, we evaluate the performance of a prioritized transmission scheme based on spectrum pooling and on the assignment of higher signal-to-noise ratio channels to higher-priority users. This performance is compared to that of unprioritized (or “symmetric”)schemes, and the impact of prioritization on the unprioritized users is discussed.
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Interference Priority: A New Scheme for Prioritized Resource Allocation in Wireless
Angel Lozano,Ezio Biglieri,Nabil Alrajeh 한국통신학회 2012 Journal of communications and networks Vol.14 No.5
A standard paradigm for the allocation of wireless resources in communication demands symmetry, that is, all users are assumed to be on equal footing and hence get equal shares of the system’s communication capabilities. However, there are situations in which “prime users” should be given priority, as for example in the transmission of emergency messages. We examine prioritization policies that could be implemented at the physical layer and propose a new one, termed interference priority (IP), which is shown to have excellent performance. We evaluate the performance of these prioritization techniques both in controlled settings and within the context of a full cellular system and discuss the impact of prioritized use of resources on the unprioritized users.
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