Esquema MIMO de Baixa Complexidade com Quatro Antenas Transmissoras e Taxa de Transmissão Unitária

Samuel T. Valduga, Dimas I. Alves, Renato Machado, Andrei P.Legg, Murilo B. Loiola

DOI: 10.14209/sbrt.2013.42

Evento: XXXI Simpósio Brasileiro de Telecomunicações (SBrT2013)

Keywords: Ganho de codificação Sistemas MIMO Realimentação de fase STBC

Abstract

In this paper we propose a low-complexity rate-one multiple-input multiple-output (MIMO) scheme with fourtransmit antennas. A preprocessor design based on phasefeedback information enables the proposed scheme to achievefull diversity order as well as a coding advantage. A signal-to-noise ratio (SNR) analysis is performed and it is used to findthe optimal (non-quantized) phases in the sense of maximizingthe instantaneous SNR. A quantized feedback analysis of theproposed scheme for quasi-static flat Rayleigh fading channelsis also considered. Monte Carlo simulations are performed fordifferent closed-loop space-time block codes with four transmitantennas and unitary transmission rate. Results illustrate that theproposed scheme achieves full diversity order and outperformsother good schemes in terms of coding gain and decoding delay.

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