Comparison of hybrid FDMA/CDMA systems in frequency selective Rayleigh fading

Authors:
T. Eng;L. B. Milstein
Affiliations:
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA;-
Venue:
IEEE Journal on Selected Areas in Communications
Year:
2006

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Cited 1

Cost optimization of integrated network planning based on adaptive sectorization in hybrid F/CDMA telecommunications system via Lagrangean relaxation

Expert Systems with Applications: An International Journal

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Abstract

A hybrid FDMA/CDMA scheme operating over a frequency selective Rayleigh fading channel is described and analyzed. The performance of the hybrid system is then compared with that of a wideband CDMA system occupying the same total bandwidth. Both coherent and noncoherent modulation formats are investigated; it is found that, for coherent modulation with a RAKE receiver, wideband CDMA has greater capacity than does the hybrid. However, for the noncoherent modulation formats (either DPSK or square-law detected orthogonal signalling), a hybrid system can have a greater capacity if a high channel error rate can be tolerated. Otherwise, a wideband noncoherent system remains optimal