1. [1] H. Elgala, R. Mesleh, and H. Haas, “Indoor optical wireless communication: Potential and state-of-the-Art,” IEEE Commun. Mag., vol.49, no.9, pp.56-62, Sept. 2011.
2. [2] T. Wada, T. Yamazato, M. Katayama, and A. Ogawa, “A constant amplitude coding for orthogonal multi-code CDMA systems,” IEICE Trans. Fundamentals, vol.E80-A, no.12, pp.2477-2483, Dec. 1997.
3. [3] Y.C. Kim, “Constant amplitude multi-code CDMA signal in recursive structure,” Electron. Lett., vol.39, no.25, pp.1782-1783, Dec. 2003.
4. [4] S. Sasaki, H. Kikuchi, J. Zhu, and G. Marubayashi, “Multiple access performance of parallel combinatory spread spectrum communications in nonfading and Rayleigh fading channels,” IEICE Trans. Commun., vol.E78-B, no.8, pp.1152-1161, Aug. 1995.
5. [5] R.L. Peterson, R.E. Ziemer, and J.L. Seoane, “Biorthogonal multicode modulation for high-reliability personal communications requiring controlled peak-to-average transmit power ratio,” 2000 International Zurich Seminar on Broadband Communications, Accessing, Transmission, Networking, Proceedings, pp.263-270, 2000.