Data Detection and Code Channel Allocation for Frequency-Domain Spread ACO-OFDM Systems Over Indoor Diffuse Wireless Channels

Future optical wireless communication systems promise to provide high-speed data transmission in indoor diffuse environments. This paper considers frequency-domain spread asymmetrically clipped optical orthogonal frequency-division multiplexing (ACO-OFDM) systems in indoor diffuse channels and aims to develop efficient data detection and code channel allocation schemes. By exploiting the frequency-domain spread concept, a linear multi-code detection scheme is proposed to maximize the signal to interference plus noise ratio (SINR) at the receiver. The achieved SINR and bit error ratio (BER) performance are analyzed. A computationally efficient code channel allocation algorithm is proposed to improve the BER performance of the frequency-domain spread ACO-OFDM system. Numerical results show that the frequency-domain spread ACO-OFDM system outperforms conventional ACO-OFDM systems in indoor diffuse channels. Moreover, the proposed linear multi-code detection and code channel allocation algorithm can improve the performance of optical peak-to-average power ratio (PAPR).

[1]  Arthur J. Lowery,et al.  SPC07-4: Performance of Asymmetrically Clipped Optical OFDM in AWGN for an Intensity Modulated Direct Detection System , 2006, IEEE Globecom 2006.

[2]  Zabih Ghassemlooy,et al.  Reducing the effects of intersymbol interference in diffuse DPIM optical wireless communications , 2003 .

[3]  Fuad E. Alsaadi,et al.  Adaptive mobile line strip multibeam MC-CDMA optical wireless system employing imaging detection in a real indoor environment , 2009, IEEE Journal on Selected Areas in Communications.

[4]  Mamoru Sawahashi,et al.  Downlink transmission of broadband OFCDM Systems-part I: hybrid detection , 2005, IEEE Transactions on Communications.

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

[6]  De-qiang Ding,et al.  A new indoor VLC channel model based on reflection , 2010 .

[7]  Lin Yang,et al.  Dynamic Code-Allocation Based PAPR Reduction Technique for MC-CDMA Systems , 2007, 2007 IEEE Wireless Communications and Networking Conference.

[8]  Khaled Fazel,et al.  Multi-Carrier and Spread Spectrum Systems , 2003 .

[9]  Rafael Perez-Jimenez,et al.  OFDM over indoor wireless optical channel , 2005 .

[10]  Jiangzhou Wang,et al.  Chunk-based resource allocation in OFDMA systems - part I: chunk allocation , 2009, IEEE Transactions on Communications.

[11]  John G. Proakis,et al.  Digital Communications , 1983 .

[12]  Volker Jungnickel,et al.  A physical model of the wireless infrared communication channel , 2002, IEEE J. Sel. Areas Commun..

[13]  Fumiyuki Adachi,et al.  Wideband DS-CDMA for next-generation mobile communications systems , 1998, IEEE Commun. Mag..

[14]  Branislav M. Popovic.  Spreading sequences for multicarrier CDMA systems , 1999, IEEE Trans. Commun..

[15]  Joseph M. Kahn,et al.  Wireless Infrared Communications , 1994 .

[16]  Jun-Bo Wang,et al.  Complementary sequences-based channel estimation for diffuse wireless optical communications , 2011 .

[17]  Joseph M. Kahn,et al.  Angle diversity for nondirected wireless infrared communication , 2000, IEEE Trans. Commun..

[18]  Jiangzhou Wang,et al.  Tight Bounds on Channel Capacity for Dimmable Visible Light Communications , 2013, Journal of Lightwave Technology.

[19]  Charles R. Johnson,et al.  Matrix analysis , 1985, Statistical Inference for Engineers and Data Scientists.

[20]  Timothy O'Farrell,et al.  Infrared wireless communication using spread spectrum techniques , 2000 .

[21]  Edward A. Lee,et al.  Simulation of Multipath Impulse Response for Indoor Wireless Optical Channels , 1993, IEEE J. Sel. Areas Commun..

[22]  Mohamed-Slim Alouini,et al.  Impact of Pointing Errors on the Performance of Mixed RF/FSO Dual-Hop Transmission Systems , 2013, IEEE Wireless Communications Letters.

[23]  Tung-Sang Ng,et al.  Downlink Transmission of Broadband OFCDM Systems-Part V: Code Assignment , 2008, IEEE Transactions on Wireless Communications.

[24]  M. Nakagawa,et al.  Adaptive Equalization for Indoor Visible-Light Wireless Communication Systems , 2005, 2005 Asia-Pacific Conference on Communications.

[25]  Jun-Bo Wang,et al.  Optimal training sequences for indoor wireless optical communications , 2012 .

[26]  Tung-Sang Ng,et al.  Code Assignment for Downlink Transmission of Broadband OFCDM Systems , 2007, 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications.

[27]  Mohsen Kavehrad,et al.  BER Performance of Free-Space Optical Transmission with Spatial Diversity , 2007, IEEE Transactions on Wireless Communications.

[28]  Jiangzhou Wang,et al.  Chunk-Based Resource Allocation in OFDMA Systems—Part II: Joint Chunk, Power and Bit Allocation , 2012, IEEE Transactions on Communications.