Communication coverage improvement of indoor SDM-VLC system using NHS-OFDM with a modified imaging receiver

This paper proposes two techniques to improve the communication coverage of an indoor space division multiplexing visible light communication (SDM-VLC) system. One technique is a non-Hermitian symmetry orthogonal frequency division multiplexing (NHS-OFDM) scheme which can be achieved by parallelly transmitting the real (Re) and imaginary (Im) parts of a complex-valued OFDM signal via a pair of white light-emitting diode (LED) lamps, and the other is a modified imaging receiver (ImR) which utilizes tilted photodetectors (PDs) to improve the performance of a conventional ImR. Analytical and simulation results show that the communication coverage of an indoor 2 × 2 SDM-VLC system can be substantially improved by using NHS-OFDM with a modified ImR, compared with the system using Hermitian symmetry based OFDM (HS-OFDM) with a conventional ImR.

[1]  Chao Yang,et al.  Wavelet transform-OFDM in indoor visible light communication , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[2]  Joseph M. Kahn,et al.  Analysis of infrared wireless links employing multibeam transmitters and imaging diversity receivers , 2000, IEEE Trans. Commun..

[3]  Harald Haas,et al.  Visible light communication using OFDM , 2006, 2nd International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, 2006. TRIDENTCOM 2006..

[4]  Zabih Ghassemlooy,et al.  Optical Wireless Communications: System and Channel Modelling with MATLAB® , 2012 .

[5]  Weiwei Hu,et al.  High-diversity space division multiplexing visible light communication utilizing a fisheye-lens-based imaging receiver , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[6]  Theodoros A. Tsiftsis,et al.  Coverage Aspects of Indoor VLC Networks , 2015, Journal of Lightwave Technology.

[7]  Harald Haas,et al.  Indoor optical wireless communication: potential and state-of-the-art , 2011, IEEE Communications Magazine.

[8]  Masao Nakagawa,et al.  Fundamental analysis for visible-light communication system using LED lights , 2004, IEEE Transactions on Consumer Electronics.

[9]  Harald Haas,et al.  Improved indoor VLC MIMO channel capacity using mobile receiver with angular diversity detectors , 2014, 2014 IEEE Global Communications Conference.

[10]  Harald Haas,et al.  Analysis of Optimal Placement of LED Arrays for Visible Light Communication , 2013, 2013 IEEE 77th Vehicular Technology Conference (VTC Spring).

[11]  J. Armstrong,et al.  Comparison of ACO-OFDM, DCO-OFDM and ADO-OFDM in IM/DD Systems , 2013, Journal of Lightwave Technology.

[12]  Dominic C. O'Brien,et al.  High data rate multiple input multiple output (MIMO) optical wireless communications using white led lighting , 2009, IEEE Journal on Selected Areas in Communications.

[13]  Thomas D. C. Little,et al.  Performance of optical spatial modulation and spatial multiplexing with imaging receiver , 2014, 2014 IEEE Wireless Communications and Networking Conference (WCNC).

[14]  Z. Ghassemlooy,et al.  Orthogonal frequency division multiplexing for indoor optical wireless communications using visible light LEDs , 2008, 2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing.

[15]  Changyuan Yu,et al.  Performance of a novel LED lamp arrangement to reduce SNR fluctuation for multi-user visible light communication systems. , 2012, Optics express.

[16]  Changyuan Yu,et al.  Performance improvement by tilting receiver plane in M-QAM OFDM visible light communications. , 2011, Optics express.

[17]  Dongweon Yoon,et al.  On the general BER expression of one- and two-dimensional amplitude modulations , 2002, IEEE Trans. Commun..

[18]  Chi-Wai Chow,et al.  Utilization of multi-band OFDM modulation to increase traffic rate of phosphor-LED wireless VLC. , 2015, Optics express.

[19]  Harald Haas.  Visible light communication , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[20]  Alex J. Grant,et al.  Position Modulating OFDM for optical wireless communications , 2012, 2012 IEEE Globecom Workshops.

[21]  Jean-Marc Duchamp,et al.  A novel FFT/IFFT size efficient technique to generate real time optical OFDM signals compatible with IM/DD systems , 2013, 2013 European Microwave Conference.

[22]  Changyuan Yu,et al.  Performance of dimming control scheme in visible light communication system. , 2012, Optics express.

[23]  Zabih Ghassemlooy,et al.  Experimental Demonstration of 50-Mb/s Visible Light Communications Using 4 $\,\times\,$ 4 MIMO , 2014, IEEE Photonics Technology Letters.