SIMO/MISO MSE-Duality for Multi-User FBMC with Highly Frequency Selective Channels

Conference: WSA 2015 - 19th International ITG Workshop on Smart Antennas
03/03/2015 - 03/05/2015 at Ilmenau, Deutschland

Proceedings: WSA 2015

Pages: 7Language: englishTyp: PDF

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Authors:
Candido, Oliver De; Baltar, Leonardo G.; Mezghani, Amine; Nossek, Josef A. (Institute for Circuit Theory and Signal Processing, Technische Universität München, 80290 Munich, Germany)

Abstract:
Filter Bank based Multicarrier (FBMC) with Offset-QAM (O-QAM) modulation is one of the strong candidates for the physical layer of 5-th generation mobile communication systems. The combination of FBMC/OQAM with multiple antennas in a multi-user scheme poses some challenges towards the design of equalizers and precoders due to the frequency overlapping of the sub-carriers, especially in environments with highly frequency selective channels. In this work we first calculate a fractionally spaced Minimum Mean Square Error (MMSE)-based equalizer design to accommodate multi-user (MU) Single Input Multiple Output (SIMO)-FBMC. Then, we apply the Mean Square Error (MSE)-duality to calculate the corresponding precoders for MU Multiple Input Single Output (MISO)-FBMC. Furthermore, we present four possibilities for the power allocation between users and sub-carriers. We finally show the performance superiority of the new method compared to a recently proposed method.