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首页> 外文会议>IEEE International Black Sea Conference on Communications and Networking >Pilot assisted channel estimation for asymmetrically clipped optical OFDM over visible light channels
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Pilot assisted channel estimation for asymmetrically clipped optical OFDM over visible light channels

机译：可见光信道上非对称限幅光学OFDM的导频辅助信道估计

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The Visible Light Communication(VLC) has drawn significant attention recently for wireless communication in addressing the performance limitations of wireless systems due to the scarcity of bandwidth. In VLC system, the visible lights is used not only for illuminating rooms but also for an optical data transmission. Asymmetrically clipped optical orthogonal frequency-division multiplexing (ACO-OFDM) has been proposed for VLC systems to provide optically power efficient solution in the optical domain. The estimation of wireless channel is crucial in order to detect the transmitted data coherently. In this work, different interpolation based channel estimations for comb-type pilot distribution are proposed over visible light channels. Computer simulation results have confirmed that the proposed spline and low pass interpolation based channel estimation techniques have a clear BER performance advantages compared with linear and pchip interpolation based channel estimations for higher order modulations.
机译：由于带宽不足，可见光通信（VLC）最近引起了无线通信的广泛关注，以解决无线系统的性能限制。在VLC系统中，可见光不仅用于照明房间，而且还用于光学数据传输。已经提出了用于VLC系统的非对称限幅的光正交频分复用（ACO-OFDM），以在光域中提供光功率有效的解决方案。无线信道的估计对于连贯地检测传输的数据至关重要。在这项工作中，提出了在可见光信道上针对梳型导频分布使用基于插值的不同信道估计。计算机仿真结果已经证实，与基于线性和pchip插值的高阶调制信道估计相比，基于样条和低通插值的信道估计技术具有明显的BER性能优势。

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