BICM-ID scheme for clipped DCO-OFDM in visible light communications.

Visible light communication (VLC) is recommended for indoor transmissions in 5G network, whereby DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) is adopted to eliminate the inter-symbol interference (ISI) but suffers from considerable performance loss induced by clipping distortion. In this paper, bit-interleaved coded modulation with iterative demapping and decoding (BICM-ID) scheme for clipped DCO-OFDM is investigated to enhance the performance of VLC systems. In order to further mitigate the clipping distortions, a novel soft demapping criterion is proposed, and a simplified demapping algorithm is developed to reduce the complexity of the proposed criterion. Simulation results illustrate that the enhanced demapping algorithm achieves a significant performance gain.

[1]  J. Armstrong,et al.  OFDM for Optical Communications , 2009, Journal of Lightwave Technology.

[2]  Xiqi Gao,et al.  Cellular architecture and key technologies for 5G wireless communication networks , 2014, IEEE Communications Magazine.

[3]  Jose Garcia Doblado,et al.  Cubic Metric Reduction for DCO-OFDM Visible Light Communication Systems , 2015, Journal of Lightwave Technology.

[4]  Joseph M. Kahn,et al.  Multiple-Subcarrier Modulation for Nondirected Wireless Infrared Communication , 1994, IEEE J. Sel. Areas Commun..

[5]  Qi Wang,et al.  Near-Optimal Low-Complexity Sequence Detection for Clipped DCO-OFDM , 2016, IEEE Photonics Technology Letters.

[6]  Lajos Hanzo,et al.  A Reduced-Complexity Demapping Algorithm for BICM-ID Systems , 2015, IEEE Transactions on Vehicular Technology.

[7]  H. Haas,et al.  Information Rate of OFDM-Based Optical Wireless Communication Systems With Nonlinear Distortion , 2013, Journal of Lightwave Technology.

[8]  Robert J. Baxley,et al.  Optimization of signal-to-noise-plus-distortion ratio for dynamic-range-limited nonlinearities , 2014, Digit. Signal Process..

[9]  Zhaocheng Wang,et al.  Layered ACO-OFDM for intensity-modulated direct-detection optical wireless transmission. , 2015, Optics express.

[10]  F. Richard Yu,et al.  A survey of energy-efficient caching in information-centric networking , 2014, IEEE Communications Magazine.

[11]  Robert J. Baxley,et al.  Nonlinear distortion mitigation in visible light communications , 2015, IEEE Wireless Communications.

[12]  Patrick Robertson,et al.  A comparison of optimal and sub-optimal MAP decoding algorithms operating in the log domain , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[13]  Lajos Hanzo,et al.  An adaptive scaling and biasing scheme for OFDM-based visible light communication systems. , 2014, Optics express.

[14]  Wei Xu,et al.  PAPR Reduction for DCO-OFDM Visible Light Communications via Semidefinite Relaxation , 2014, IEEE Photonics Technology Letters.

[15]  Tianqi Mao,et al.  Ellipse-based DCO-OFDM for visible light communications , 2016 .

[16]  Stephan ten Brink,et al.  Convergence behavior of iteratively decoded parallel concatenated codes , 2001, IEEE Trans. Commun..