Abstract
Through analyzing the theoretical spreading principle, it has been proved in this paper that the benefit of pseudo-orthogonal carrier interferometry (PO-CI) spreading code is not supported when complex signal modulation (e.g., quadrature phase-shift keying (QPSK) and quadrature amplitude modulation (QAM)) types are employed. On this basis, a novel and feasible structure for this problem is brought forward. Within the structure mentioned, instead of complex modulation patterns, pulse amplitude modulation (PAM) combined with PO-CI spreading code is utilized. This allows us to maintain the throughput increase of a multi-carrier code division multiple access (MC-CDMA) system with minimal loss in performance and no bandwidth expansion.
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References
Nassar C R, Michelini M, Wu Z Q, et al. High-performance MC-CDMA via carrier interferometry codes. IEEE Transactions on Vehicular Technology, 2001, 50(6): 1344–1353
Nassar C R, Natarajan B, Shattil S. Introduction of carrier interferometry to spread spectrum multiple access. In: Proceedings of Wireless Communications and Systems. Dallas: IEEE Press, 1999, 4: 1–5
Wiegandt D A, Nassar C R, Wu Z. Overcoming peak-to-average power ratio issues in OFDM via carrier interferometry codes. In: Proceedings of Vehicular Technology Conference. Atlantic: IEEE Press, 2001, 2: 660–663
He J H, Quan Z Y, Men A D. PAPR reduction in OFDM systems with large number of sub-carriers by carrier interferometry approaches. The Journal of China Universities of Posts and Telecommunications, 2004, 11(4): 91–94
Natarajan B, Wu Z Q, Nassar C R, et al. Large set of CI spreading codes for high-capacity MC-CDMA. IEEE Transactions on Communications, 2004, 52(11): 1862–1866
Wiegandt D A, Wu Z Q, Nassar C R. High-throughput, highperformance OFDM via pseudo-orthogonal carrier interferometry spreading codes. IEEE Transactions on Communications, 2003, 51(7): 1123–1134
Sureshkumar S, Nguyen H H, Shwedyk E. Adaptive carrier interferometry MC-CDMA. IEEE Transactions on Vehicular Technology, 2006, 55(3): 968–979
Wiegandt D A, Nassar C R. High-throughput, high-performance OFDM via pseudo-orthogonal carrier interferometry coding. In: Proceedings of the 12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. San Diego: IEEE Press, 2001, 2: G-98–G-102
Wiegandt D A, Nassar C R. High-throughput, high-performance OFDM via pseudo-orthogonal carrier interferometry type 2. In: Proceedings of the 5th International Symposium on Wireless Personal Multimedia Communications. Hawaii: IEEE Press, 2002, 2: 729–733
Wiegandt D A, Nassar C R. Higher-speed, higher-performance 802.11a wireless LAN via carrier-interferometry orthogonal frequency division multiplexing. In: Proceedings of IEEE International Conference on Communications. New York: IEEE Press, 2002, 1: 527–532
Natarajan B, Nassar R, Shattil S. High-throughput high-performance TDMA through pseudo-orthogonal carrier interferometry pulse shaping. IEEE Transactions on Wireless Communications, 2004, 3(3): 689–694
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Translated from Journal of Beijing University of Posts and Telecommunications, 2007, 30(4): 14–18 [译自: 北京邮电大学学报]
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Zhang, Y., Tang, L., Tao, X. et al. A PO-CI/MC-CDMA scheme for high modulation styles. Front. Electr. Electron. Eng. Ch 3, 145–149 (2008). https://doi.org/10.1007/s11460-008-0024-4
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DOI: https://doi.org/10.1007/s11460-008-0024-4