Title :
Spectrum efficiency of a TDMA/W-CDMA frequency sharing system with notch filters and signal clippers
Author :
Kikuchi, Hiroaki ; Zhou, J. ; Sasaki, Seishi ; Muramatsu, S. ; Onozato, Y.
Author_Institution :
Dept. of Electr. & Electron. Eng., Niigata Univ., Japan
fDate :
29 June-1 July 2002
Abstract :
In this article, the co-existence of TDMA and W-CDMA spectrum sharing system (TDMA/W-CDMA overlaid system) with cellular architecture is discussed. In this system, both systems share the same frequency band to improve the spectrum efficiency. The overall rate and spectrum efficiency of the system are calculated for the forward link (down-link) in the presence of the AWGN channel. Taking into account the path loss and shadow fading loss in this system with cellular architecture, W-CDMA applying interference cancellation (IC) shows a substantial difference in spectrum efficiency, the overlaid system can provide a greater overall rate and higher spectrum efficiency than a single multiple access-based system such as the TDMA system or W-CDMA system.
Keywords :
AWGN channels; broadband networks; cellular radio; code division multiple access; fading channels; filtering theory; interference suppression; multiuser channels; notch filters; radio links; radio networks; radiofrequency filters; radiofrequency interference; time division multiple access; AWGN channel; TDMA/W-CDMA frequency sharing system; TDMA/W-CDMA overlaid system; cellular architecture; downlink; forward link; interference cancellation; multiple access-based system; notch filters; path loss; shadow fading loss; signal clippers; spectrum efficiency; Computer science; Fading; Filters; Frequency; Interference cancellation; Multiaccess communication; Propagation losses; Radio transmitters; Shadow mapping; Time division multiple access;
Conference_Titel :
Communications, Circuits and Systems and West Sino Expositions, IEEE 2002 International Conference on
Print_ISBN :
0-7803-7547-5
DOI :
10.1109/ICCCAS.2002.1180601
