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Asymptotic Analysis of Area Spectral Efficiency and Energy Efficiency in PPP Networks with SLNR Precoder

Abstract : This paper aims at characterizing the energy efficiency area spectral efficiency (EE-ASE) tradeoff in random geometry networks with multiple-antenna arrays at base stations (BSs). In particular, ASE and EE are studied w.r.t. the transmit power when BSs use a signal-to-leakage-plus-noise ratio (SLNR) precoder. When the static power consumption cannot be neglected, EE behaves linearly w.r.t. ASE before a sharp decreasing of EE due to the interference-limited characteristic of the network. Our contribution relies on the derivation of a closed-form expression for ASE with SLNR precoder in the asymptotic regime, i.e. when the number of antennas and users grows to infinity, using stochastic geometry. We derive EE from a linear power consumption model afterwards. Unlike conventional SLNR precoders, the average signal-to-interference-plus-noise ratio and the leakage to other cells are considered in a geometry dependent network. Extensive Monte Carlo simulations show that despite the asymptotic nature of the theoretical analysis, the closed-form expressions are tight w.r.t. simulations even for moderate number of antennas and users. Hence, the analysis can be used for realistic network performance analysis.
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Submitted on : Friday, June 30, 2017 - 11:16:25 AM
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Ahmad Alam, Philippe Mary, Jean-Yves Baudais, Xavier Lagrange. Asymptotic Analysis of Area Spectral Efficiency and Energy Efficiency in PPP Networks with SLNR Precoder. IEEE Transactions on Communications, Institute of Electrical and Electronics Engineers, 2017, 65 (7), pp.3172 - 3185. ⟨10.1109/TCOMM.2017.2699192⟩. ⟨hal-01551410⟩



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