Title :
Optimal spectral overlay of DS/CDMA communication systems
Author :
Jin Hee Han ; Kim, Sang Wu
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Energy Res. Inst., Taejeon, South Korea
Abstract :
We examine the capacity of the spectrally overlaid narrowband CDMA systems. The available wideband spectrum is divided into a number of subspectra of smaller bandwidths and each narrowband CDMA system employs spreading with a reduced processing gain relative to the conventional wideband system. We analyze the interferences from the adjacent (spectrally) narrowband CDMA systems, and find the optimal amount of spectral overlap between adjacent CDMA systems which maximizes the capacity. Then, we examine the optimal number of narrowband CDMA systems that maximizes the overall capacity when the overall bandwidth is fixed
Keywords :
adjacent channel interference; channel capacity; code division multiple access; fading; land mobile radio; multipath channels; optimisation; pseudonoise codes; radiofrequency interference; spread spectrum communication; DS/CDMA communication systems; bandwidths; capacity; fixed overall bandwidth; interferences; multipath fading channels; narrowband CDMA systems; nonfading channels; optimal spectral overlay; reduced processing gain; spread spectrum; wideband spectrum; Bandwidth; Fading; Frequency conversion; Interference; Multiaccess communication; Narrowband; Wideband;
Conference_Titel :
Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-7803-2955-4
DOI :
10.1109/ICUPC.1995.497084
