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Título:
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Optimum energy allocation for massive spread-spectrum multiple access in networks of uncoordinated energy-limited terminals
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Autor/a:
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Villares Piera, Nemesio Javier; Rey Micolau, Francesc; Sala Álvarez, José
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions |
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Abstract:
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This paper derives the energy allocation policy that maximizes the aggregate spectral efficiency of an uncoordinated spread-spectrum multiple access network operating in the large-user regime and subject to a longterm per-user average energy constraint. Focusing on a network of autonomous energy-limited devices, we consider
that the receiver operates under noise-dominant conditions and that every transmitter is able to estimate accurately its own slowly time-varying channel with no feedback from the receiver. The aggregate spectral efficiency is derived
in terms of the statistical distribution of the channel power gains and of the Packet Error Rate (PER) curve of the common modulation and error correcting code employed by all users. Using Variational Calculus, we obtain a
closed-form expression for the optimum energy profile at low average Es/N0 and prove that the aggregate spectral efficiency converges to a non-vanishing value if the user population is large and terminals implement an uncoordinated
admission control based on the known PER curve. |
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Abstract:
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Peer Reviewed |
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Materia(s):
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-Àrees temàtiques de la UPC::Energies::Eficiència energètica
-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
-Energy consumption
-Spread spectrum communications
-Spread spectrum communication
-Statistical analysis
-Time-varying channels
-Optimum energy allocation
-Massive spread-spectrum multiple access
-Uncoordinated energy-limited terminals
-Energy allocation policy
-Long-term per-user average energy constraint
-Autonomous energy-limited devices
-Time-varying channel
-Spectral efficiency
-Statistical distribution
-Channel power gains
-Packet error rate curve
-PER curve
-Error correcting code
-Variational calculus
-Closed-form expression
-Uncoordinated admission control
-Energia -- Consum
-Comunicacions d'espectre eixamplat |
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Derechos:
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Tipo de documento:
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Artículo - Versión publicada
Objeto de conferencia |
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Editor:
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Institute of Electrical and Electronics Engineers (IEEE)
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Compartir:
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