In this paper, we propose a novel channel estimation method and optimize the pilot symbols based on intrinsic interference utilization for offset quadrature amplitude modulation based filter-bank multicarrier (OQAM/FBMC) systems. Specifically, we firstly propose a line fitting based channel estimation method by analyzing and utilizing the distribution characteristics of the demodulated OQAM symbols, where no guard symbols are needed between pilot symbols and data symbols. Then, we formulate a pilot symbol optimization problem by utilizing the intrinsic interferences to improve the accuracy of the line fitting. Finally, we obtain the optimal solution of the optimization problem and present the corresponding pilot structure. Simulation results demonstrate that the proposed method with the optimized pilot structure performs the best among candidate pilot symbols and outperforms the traditional interference approximation method (IAM) with the optimal pilot structure.

中文翻译：

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基于固有干扰利用的 OQAM/FBMC 系统信道估计和导频符号优化

在本文中，我们提出了一种新的信道估计方法，并基于对基于偏移正交幅度调制的滤波器组多载波 (OQAM/FBMC) 系统的固有干扰利用率来优化导频符号。具体来说，我们首先通过分析和利用解调后的OQAM符号的分布特性，提出了一种基于线路拟合的信道估计方法，其中导频符号和数据符号之间不需要保护符号。然后，我们利用固有干扰来制定导频符号优化问题，以提高线路拟合的精度。最后，我们得到了优化问题的最优解，并给出了相应的导频结构。