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A Study of Pilot-Aided Channel Estimation in MIMO-GFDM Systems

机译：MIMO-GFDM系统中的导频辅助信道估计研究

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摘要

Generalized frequency division multiplexing (GFDM) is a promising candidate waveform for next generation wireless communications systems. Unlike conventional orthogonal frequency division multiplexing (OFDM) based systems, it is a non-orthogonal waveform subject to inter-carrier and inter-symbol interference. In multiple-input multiple-output (MIMO) systems, the additional inter-antenna interference also takes place. The presence of such three-dimensional interference challenges the receiver design. This paper addresses the MIMOGFDM channel estimation problem with the aid of known reference signals also referred as pilots. Specifically, the received signal is expressed as the joint effect of the pilot part, unknown data part and noise part. On top of this formulation, least squares (LS) and linear minimum mean square error (LMMSE) estimators are presented, while their performance is evaluated for various pilot arrangements.
机译：广义频分复用（GFDM）是下一代无线通信系统的有希望的候选波形。与传统的基于正交频分复用（OFDM）的系统不同，它是受载波间和符号间干扰的非正交波形。在多输入多输出（MIMO）系统中，还会发生额外的天线间干扰。这种三维干扰的存在对接收机设计提出了挑战。本文借助已知的参考信号（也称为导频）解决了MIMOGFDM信道估计问题。具体而言，将接收到的信号表示为导频部分，未知数据部分和噪声部分的联合效应。在此公式的基础上，给出了最小二乘法（LS）和线性最小均方误差（LMMSE）估计量，同时针对各种试点安排评估了它们的性能。

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