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Enhanced Bayesian MMSE channel estimation for visible light communication

机译:用于可见光通信的增强贝叶斯MMSE信道估计

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Visible light communication (VLC) is considered as a potential candidate of five generation (5G) technologies and thus attracts increasing research interest recently. Optical orthogonal frequency division multiplexing (O-OFDM) has been proposed for VLC systems to eliminate the multi-path interference, while also facilitating frequency domain equalisation (FDE). In comparison to conventional radio frequency (RF) based wireless communication, there has been limited considerations on channel estimation (CE) for VLC, where the indoor optical wireless channel model differs from the traditional RF case. In this paper, we present a new channel estimation algorithm for indoor downlink (DL) VLC systems that exploits historical information in an adaptive and efficient way. The proposed scheme is capable of offering superior performance at the cost of modest complexity under practical scenarios. Detailed theoretical analysis is provided along with extensive numerical results, demonstrating the effectiveness of the proposed CE approach.
机译:可见光通信(VLC)被认为是五代(5G)技术的潜在候选者,因此最近引起了越来越多的研究兴趣。已经提出了用于VLC系统的光学正交频分复用(O-OFDM),以消除多径干扰,同时还促进频域均衡(FDE)。与基于常规射频(RF)的无线通信相比,对于VLC的信道估计(CE)的考虑有限,其中室内光学无线信道模型与传统RF情况有所不同。在本文中,我们提出了一种用于室内下行链路(DL)VLC系统的新信道估计算法,该算法以自适应有效的方式利用历史信息。所提出的方案能够在实际情况下以适度的复杂性为代价提供卓越的性能。提供了详细的理论分析以及大量的数值结果,证明了所提出的CE方法的有效性。

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