[1] Andrews J G, Buzzi S, Choi W et al. What will 5G be?[J]. IEEE Journal on Selected Areas in Communications, 32, 1065-1082(2014).

     Andrews J G, Buzzi S, Choi W et al. What will 5G be?[J]. IEEE Journal on Selected Areas in Communications, 32, 1065-1082(2014).

[2] Komine T, Haruyama S, Nakagawa M. A study of shadowing on indoor visible-light wireless communication utilizing plural white LED lightings[J]. Wireless Personal Communications, 34, 211-225(2005). http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1407204

     Komine T, Haruyama S, Nakagawa M. A study of shadowing on indoor visible-light wireless communication utilizing plural white LED lightings[J]. Wireless Personal Communications, 34, 211-225(2005). http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1407204

[3] González O. Martín-González J A, Poves E, et al. Adaptive code-division multiple-access system for communications over indoor wireless optical channels based on random optical codes[J]. IET Optoelectronics, 3, 187-196(2009).

     González O. Martín-González J A, Poves E, et al. Adaptive code-division multiple-access system for communications over indoor wireless optical channels based on random optical codes[J]. IET Optoelectronics, 3, 187-196(2009).

[4] Salehi J A. Code division multiple-access techniques in optical fiber networks. I. Fundamental principles[J]. IEEE Transactions on Communications, 37, 824-833(1989). http://ieeexplore.ieee.org/iel1/26/1344/00031181.pdf

     Salehi J A. Code division multiple-access techniques in optical fiber networks. I. Fundamental principles[J]. IEEE Transactions on Communications, 37, 824-833(1989). http://ieeexplore.ieee.org/iel1/26/1344/00031181.pdf

[5] Salehiomran A, Salehi J A. Spatial heterodyning optical code division multiple access technique for near-field free-space optical communication systems[J]. Journal of Optical Communications and Networking, 1, 498-511(2009). http://www.opticsinfobase.org/abstract.cfm?uri=JOCN-1-5-498

     Salehiomran A, Salehi J A. Spatial heterodyning optical code division multiple access technique for near-field free-space optical communication systems[J]. Journal of Optical Communications and Networking, 1, 498-511(2009). http://www.opticsinfobase.org/abstract.cfm?uri=JOCN-1-5-498

[6] O'Farrell T. Kiatweerasakul M. Performance of a spread spectrum infrared transmission system under ambient light interference. [C]∥Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, September 8-11, 1998, Boston, MA. New York: IEEE, 703-707(2002).

     O'Farrell T. Kiatweerasakul M. Performance of a spread spectrum infrared transmission system under ambient light interference. [C]∥Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, September 8-11, 1998, Boston, MA. New York: IEEE, 703-707(2002).

[7] Schenk T C W, Feri L, Yang H M et al. . Optical wireless CDMA employing solid state lighting LEDs. [C]∥2009 IEEE/LEOS Summer Topical Meeting, July 20-22, 2009, Newport Beach, CA, USA. New York: IEEE, 23-24(2009).

     Schenk T C W, Feri L, Yang H M et al. . Optical wireless CDMA employing solid state lighting LEDs. [C]∥2009 IEEE/LEOS Summer Topical Meeting, July 20-22, 2009, Newport Beach, CA, USA. New York: IEEE, 23-24(2009).

[8] He C, Yang L L, Xiao P et al. DS-CDMA assisted visible light communications systems. [C]∥2015 IEEE 20th International Workshop on Computer Aided Modelling and Design of Communication Links and Networks (CAMAD), September 7-9, 2015, Guildford, UK. New York: IEEE, 27-32(2015).

     He C, Yang L L, Xiao P et al. DS-CDMA assisted visible light communications systems. [C]∥2015 IEEE 20th International Workshop on Computer Aided Modelling and Design of Communication Links and Networks (CAMAD), September 7-9, 2015, Guildford, UK. New York: IEEE, 27-32(2015).

[9] Matsuo R, Matsuo M, Ohtsuki T et al. Performance analysis of indoor infrared wireless systems using OOK CDMA on a diffuse channel[J]. Electronics and Communications in Japan (Part I: Communications), 84, 1-9(2001). http://onlinelibrary.wiley.com/doi/10.1002/ecja.1042/full

     Matsuo R, Matsuo M, Ohtsuki T et al. Performance analysis of indoor infrared wireless systems using OOK CDMA on a diffuse channel[J]. Electronics and Communications in Japan (Part I: Communications), 84, 1-9(2001). http://onlinelibrary.wiley.com/doi/10.1002/ecja.1042/full

[10] Guan W P, Wu Y X, Wen S S et al. Indoor positioning technology of visible light communication based on CDMA modulation[J]. Acta Optica Sinica, 36, 1106006(2016).

     Guan W P, Wu Y X, Wen S S et al. Indoor positioning technology of visible light communication based on CDMA modulation[J]. Acta Optica Sinica, 36, 1106006(2016).

[11] Yuan X G, Zhang Y A, Zhang J N et al. Visible light communication system based on direct sequence spread spectrum[J]. Acta Optica Sinica, 34, s106004(2014).

     Yuan X G, Zhang Y A, Zhang J N et al. Visible light communication system based on direct sequence spread spectrum[J]. Acta Optica Sinica, 34, s106004(2014).

[12] Matsuo R, Ohtsuki T, Sasase I. Performance analysis of indoor infrared wireless systems using PPM CDMA with linealizer with dead-zone and PPM CDMA with hard-limiter on diffuse channels. [C]∥ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240), June 11-14, 2001, Helsinki, Finland. New York: IEEE, 2016-2020(2001).

     Matsuo R, Ohtsuki T, Sasase I. Performance analysis of indoor infrared wireless systems using PPM CDMA with linealizer with dead-zone and PPM CDMA with hard-limiter on diffuse channels. [C]∥ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240), June 11-14, 2001, Helsinki, Finland. New York: IEEE, 2016-2020(2001).

[13] Liu J, Pan Z N, Noonpakdee W et al. Impact of light reflection on indoor wireless optical CDMA systems[J]. Journal of Optical Communications and Networking, 4, 989-996(2012). http://www.opticsinfobase.org/jocn/abstract.cfm?uri=jocn-4-12-989

     Liu J, Pan Z N, Noonpakdee W et al. Impact of light reflection on indoor wireless optical CDMA systems[J]. Journal of Optical Communications and Networking, 4, 989-996(2012). http://www.opticsinfobase.org/jocn/abstract.cfm?uri=jocn-4-12-989

[14] Alsaadi F E. Elmirghani J M H. MC-CDMA indoor optical wireless system. [C]∥IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference, November 26-30, 2007, Washington, D. C., USA. New York: IEEE, 2455-2460(2007).

     Alsaadi F E. Elmirghani J M H. MC-CDMA indoor optical wireless system. [C]∥IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference, November 26-30, 2007, Washington, D. C., USA. New York: IEEE, 2455-2460(2007).

[15] Tanaka Y, Komine T, Haruyama S et al. Indoor visible communication utilizing plural white LEDs as lighting. [C]∥12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598), September 30-October 3, 2001, San Diego, CA, USA. New York: IEEE, F81-F85(2001).

     Tanaka Y, Komine T, Haruyama S et al. Indoor visible communication utilizing plural white LEDs as lighting. [C]∥12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598), September 30-October 3, 2001, San Diego, CA, USA. New York: IEEE, F81-F85(2001).

[16] Fu W H, Wei J, Liu N A et al. OFDM modem system simulation experiment based on MATLAB[J]. Journal of Electrical and Electronic Teaching, 139-143(2018).

     Fu W H, Wei J, Liu N A et al. OFDM modem system simulation experiment based on MATLAB[J]. Journal of Electrical and Electronic Teaching, 139-143(2018).

[17] Luan Y Z, Jiang G, Li J D. MC-CDMA for optical wireless communications[J]. Proceedings of SPIE, 6021, 60210Z(2005). http://proceedings.spiedigitallibrary.org/mobile/proceeding.aspx?articleid=721105

     Luan Y Z, Jiang G, Li J D. MC-CDMA for optical wireless communications[J]. Proceedings of SPIE, 6021, 60210Z(2005). http://proceedings.spiedigitallibrary.org/mobile/proceeding.aspx?articleid=721105

[18] Alsaadi F E. Elmirghani J M H. Adaptive mobile line strip multibeam MC-CDMA optical wireless system employing imaging detection in a real indoor environment[J]. IEEE Journal on Selected Areas in Communications, 27, 1663-1675(2009).

     Alsaadi F E. Elmirghani J M H. Adaptive mobile line strip multibeam MC-CDMA optical wireless system employing imaging detection in a real indoor environment[J]. IEEE Journal on Selected Areas in Communications, 27, 1663-1675(2009).

[19] Alsaadi F E. Elmirghani J M H. Spot diffusing angle diversity MC-CDMA optical wireless system[J]. IET Optoelectronics, 3, 131-141(2009).

     Alsaadi F E. Elmirghani J M H. Spot diffusing angle diversity MC-CDMA optical wireless system[J]. IET Optoelectronics, 3, 131-141(2009).

[20] Farooqui M Z, Saengudomlert P. Transmit power reduction through subcarrier selection for MC-CDMA-based indoor optical wireless communications with IM/DD[J]. EURASIP Journal on Wireless Communications and Networking, 2013, 138(2013). http://link.springer.com/article/10.1186/1687-1499-2013-138

     Farooqui M Z, Saengudomlert P. Transmit power reduction through subcarrier selection for MC-CDMA-based indoor optical wireless communications with IM/DD[J]. EURASIP Journal on Wireless Communications and Networking, 2013, 138(2013). http://link.springer.com/article/10.1186/1687-1499-2013-138

[21] Abdelaziz A M. El-Shimy M A, El-Sahn Z A. Reduced complexity interleaved multi-carrier CDMA for indoor visible light communications. [C]∥2017 IEEE Photonics Conference (IPC), October 1-5, 2017, Orlando, FL, USA. New York: IEEE, 551-552(2017).

     Abdelaziz A M. El-Shimy M A, El-Sahn Z A. Reduced complexity interleaved multi-carrier CDMA for indoor visible light communications. [C]∥2017 IEEE Photonics Conference (IPC), October 1-5, 2017, Orlando, FL, USA. New York: IEEE, 551-552(2017).

[22] Shoreh M H, Fallahpour A, Salehi J A. Design concepts and performance analysis of multicarrier CDMA for indoor visible light communications[J]. Journal of Optical Communications and Networking, 7, 554-562(2015). http://ieeexplore.ieee.org/document/7116868/

     Shoreh M H, Fallahpour A, Salehi J A. Design concepts and performance analysis of multicarrier CDMA for indoor visible light communications[J]. Journal of Optical Communications and Networking, 7, 554-562(2015). http://ieeexplore.ieee.org/document/7116868/

[23] Jia K J, Hao L. The design and performance analysis of optical wireless ACO-MC-CDMA system in the presence of clipping noise[J]. Science China Information Sciences, 61, 029304(2018). http://link.springer.com/10.1007/s11432-017-9130-7

     Jia K J, Hao L. The design and performance analysis of optical wireless ACO-MC-CDMA system in the presence of clipping noise[J]. Science China Information Sciences, 61, 029304(2018). http://link.springer.com/10.1007/s11432-017-9130-7

[24] Harada H, Prasad R. Simulation and software radio for mobile communications[M]. Norwood, MA, USA: Artech House, Inc.(2002).

     Harada H, Prasad R. Simulation and software radio for mobile communications[M]. Norwood, MA, USA: Artech House, Inc.(2002).

[26] Jia K J, Jin B, Hao L et al. Performance analysis of DCO-OFDM and ACO-OFDM systems in indoor visible light communications[J]. Chinese Journal of Lasers, 44, 0806003(2017).

     Jia K J, Jin B, Hao L et al. Performance analysis of DCO-OFDM and ACO-OFDM systems in indoor visible light communications[J]. Chinese Journal of Lasers, 44, 0806003(2017).

[27] Jia K J, Hao L, Yu C H. Modeling of multipath channel and performance analysis of MIMO-ACO-OFDM system for indoor visible light communications[J]. Acta Optica Sinica, 36, 0706005(2016).

     Jia K J, Hao L, Yu C H. Modeling of multipath channel and performance analysis of MIMO-ACO-OFDM system for indoor visible light communications[J]. Acta Optica Sinica, 36, 0706005(2016).

[28] Elgala H, Mesleh R, Haas H. Practical considerations for indoor wireless optical system implementation using OFDM. [C]∥2009 10th International Conference on Telecommunications, June 8-10, 2009, Zagreb, Croatia. New York: IEEE, 25-29(2009).

     Elgala H, Mesleh R, Haas H. Practical considerations for indoor wireless optical system implementation using OFDM. [C]∥2009 10th International Conference on Telecommunications, June 8-10, 2009, Zagreb, Croatia. New York: IEEE, 25-29(2009).

[29] Carruthers J B, Kahn J M. Modeling of nondirected wireless infrared channels[J]. IEEE Transactions on Communications, 45, 1260-1268(1997). http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=541403

     Carruthers J B, Kahn J M. Modeling of nondirected wireless infrared channels[J]. IEEE Transactions on Communications, 45, 1260-1268(1997). http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=541403

[30] Wilson S K, Armstrong J. Transmitter and receiver methods for improving asymmetrically-clipped optical OFDM[J]. IEEE Transactions on Wireless Communications, 8, 4561-4567(2009). http://ieeexplore.ieee.org/document/5285179/

     Wilson S K, Armstrong J. Transmitter and receiver methods for improving asymmetrically-clipped optical OFDM[J]. IEEE Transactions on Wireless Communications, 8, 4561-4567(2009). http://ieeexplore.ieee.org/document/5285179/

[31] Dimitrov S, Sinanovic S, Haas H. Clipping noise in OFDM-based optical wireless communication systems[J]. IEEE Transactions on Communications, 60, 1072-1081(2012). http://ieeexplore.ieee.org/document/6162931/

     Dimitrov S, Sinanovic S, Haas H. Clipping noise in OFDM-based optical wireless communication systems[J]. IEEE Transactions on Communications, 60, 1072-1081(2012). http://ieeexplore.ieee.org/document/6162931/