Ultra-wideband MC-CDMA and CI/MC-CDMA systems

Zhiqiang Wu; Carl R. Nassar

doi:10.1117/12.455395

12 November 2002 Ultra wideband MC-CDMA and CI/MC-CDMA systems

Zhiqiang Wu, Carl R. Nassar

Proceedings Volume 4869, Emerging Technologies for Future Generation Wireless Communications; (2002) https://doi.org/10.1117/12.455395
Event: ITCom 2002: The Convergence of Information Technologies and Communications, 2002, Boston, MA, United States

Abstract

Future-generation wireless communication systems, designed to support very-high-rate data services, will require ultra-wide frequency bands. However, the frequency spectrum is a very scarce resource and has (for the most part) already been allocated to different entities in small blocks. No one entity owns a contiguous ultra-wide bandwidth. Hence, any company seeking to create ultra-wide bandwidth communications will need to construct a system that operates over non-contiguous frequency bands. In this paper, we extend the MC-CDMA and CI/MC-CDMA architectures such that they operate over non-adjacent frequency bands. In this way, the MC-CDMA and CI/MC-CDMA systems support ultra-wideband communications by operating over a large set of non-contiguous frequency bands, where each band may be either unlicenced or appropriately licensed. Furthermore, we ensure that these proposed systems (1) exploit the full diversity benefits available over non-adjacent bands, maximizing performance, and (2) exploit the total bandwidth to maximize network capacity, as measured by number of users (per cell). Simulation results over typical multi-path fading channels confirm that these proposed systems not only support ultra-wideband communications over non-contiguous frequency bands, but outperforms similar systems over contiguous frequency bands (as a direct result of larger frequency diversity available).

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Zhiqiang Wu and Carl R. Nassar "Ultra wideband MC-CDMA and CI/MC-CDMA systems", Proc. SPIE 4869, Emerging Technologies for Future Generation Wireless Communications, (12 November 2002); https://doi.org/10.1117/12.455395

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KEYWORDS

Telecommunications

Receivers

Interferometry

Wireless communications

Data communications

Computer simulations

Systems modeling

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