[1] [1] Y. Peng, Z. Fang, and E. Zang, Chin. Opt. Lett. 10, S11405 (2012).

[2] [2] J. Zhang, Y. Yang, and H. Jia, Chin. Opt. Lett. 11, 102304 (2013).

[3] [3] G. L. Harvey, "A survey of ultraviolet communication systems" Naval Research Laboratory Technical Report (1964).

[4] [4] Z. Y. Xu and B. M. Sadler, IEEE Commun. Mag. 46, 67 (2008).

[5] [5] W. S. Ross and R. S. Kennedy, “An investigation of atmospheric optically scattered non-line-of-sight communication links” Army Research Office Project Report (1980).

[6] [6] J. J. Puschell and R. Bayse, in Proceedings of the Tactical Com-munications 253 (1990).

[7] [7] Q. He, Z. Xu, and B. M. Sadler, Opt. Express 18, 12226 (2010).

[8] [8] H. Zhang, H. Yin, H. Jia, J. Yang, and S. Chang, Opt. Express 19, 21216 (2011).

[9] [9] Z. Y. Xu, H. P. Ding, B. M. Sadler, and G. Chen, Opt. Lett. 33, 1860 (2008).

[10] [10] P. Luo, M. Zhang, and D. Han, Opt. Express 20, 23489 (2012).

[11] [11] H. F. Xiao, Y. Zuo, J. Wu, Y. Yan, and J. T. Lin, Opt. Lett. 37, 4143 (2012).

[12] [12] P. Luo, M. Zhang, Y. Liu, and D. Han, in Proceedings of IEEE CSNDSP 18 (2012).

[13] [13] M. Noshad and M. Brandt-Pearce, in Proceedings of GLOBE-COM 843 (2011).

[14] [14] D. Han, Y. Liu, K. Zhang, P. Luo, and M. Zhang, Opt. Express 20, 15833 (2012).

[15] [15] T. O’Farrell and M. Kiatweerasakul, in Proceedings of IEEE 5th International Symposium on Spread Spectrum Techniques and Applications 752 (1998).

[16] [16] T. O’Farrell and M. Kiatweerasakul, in Proceedings of IEEE 9th International Symposium on Personal, Indoor and Mobile Com-munications 703 (1998).

[17] [17] K. K. Wong, T. O’Farrell, and M. Kiatweerasakul, Int. J. Commun. Syst. 13, 511 (2000).

[18] [18] K. K. Wong and T. O’Farrell, IEEE Wireless Commun. 10, 54 (2003).

[19] [19] R. L. Pickholtz, L. B. Milstein, and D. L. Schilling, IEEE Trans. Vehicular Technol. 40, 313 (1991).

[20] [20] T. O’Farrell and S. Lochmann, Electron. Lett. 30, 63 (1994).

[21] [21] M. L. Pham, K. Makelainen, and A. B. Sharma, in Proceedings of International Conference on Communication Technology (ICCT) 567 (1996).

[22] [22] C. C. Kilgus, IEEE Commun. Trans. 21, 772 (1973).

[23] [23] J. H. Lee, I. Song, S. R. Park, and J. Lee, IEEE Trans. Vehicular Technol. 53, 49 (2004).

[24] [24] H. Ding, G. Chen, A. K. Majumdar, B. M. Sadler, and Z. Xu, IEEE J. Sel. Areas Commun. 27, 1535 (2009).