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Communication Dans Un Congrès Année : 2015

Energy and spectral tradeoff for uncoded system with MQAM modulation

Résumé

The energy consumption of wireless communicating devices as well as their autonomy are two important factors in energy constrained system such as Wireless Sensor Networks (WSNs). The spectral efficiency is another important metric. The main goal is to study the trade-off between the energy consumption of the system and it’s spectral efficiency when varying system parameters. In this paper, an uncoded system using M-ary Quadrature Amplitude Modulation (MQAM) in which the spectral efficiency is assumed proportional to its bandwidth efficiency is used. In order to find the balance between spectral and energy requirements, the considered system parameters are studied. First, a general and comprehensive power model for both transmitter and receiver is developed. Next, by considering Additive White Gaussian Noise (AWGN) channel for point-to-point communication, the total energy consumption is evaluated. A new approximation for the Bit Error Rate (BER) is adopted. Then, the effect of communication distance and the occupied signal bandwidth on the optimum spectral efficiency are studied. We show the influence of varying the circuit consumption. For a fixed BER, we demonstrate that for each of those parameters, an optimum spectral efficiency can be found.
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Dates et versions

hal-01171208 , version 1 (03-07-2015)

Identifiants

  • HAL Id : hal-01171208 , version 1

Citer

Randa Jaouadi, Guillaume Andrieux, Jean-Yves Baudais, Jean-François Diouris. Energy and spectral tradeoff for uncoded system with MQAM modulation. The third Sino-French Workshop on Information and Communication Technologies (SIFWICT 2015), Jun 2015, Nantes, France. ⟨hal-01171208⟩
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