Title :
Adaptive coding rate and processing gain control for cellular DS/CDMA systems
Author :
Abeta, Sadayuki ; Sampei, Seiichi ; Morinaga, Norihiko
Author_Institution :
Fac. of Eng., Osaka Univ., Japan
Abstract :
This paper proposes an adaptive control scheme for processing gain and coding rate to achieve equivalent fast power control for high quality and high bit rate up-link cellular DS/CDMA systems. The proposed method employs a soft power control that has an upper and a lower threshold for the non-power control region to suppress adjacent cell interference, and an adaptive control for coding rate and processing gain to offset the C/I degradation due to the soft power control as well as to improve the BER performance. The results show that the proposed system can achieve 5 times or more system capacity than the conventional one
Keywords :
adaptive codes; adaptive control; adaptive signal processing; adjacent channel interference; cellular radio; coding errors; error statistics; interference suppression; land mobile radio; power control; pseudonoise codes; radio links; radiofrequency interference; spread spectrum communication; telecommunication control; BER performance; C/I degradation; adaptive coding rate; adjacent cell interference suppression; cellular DS/CDMA systems; fast power control; high bit rate; lower threshold; processing gain control; soft power control; system capacity; up-link; upper threshold; Adaptive coding; Adaptive control; Bit error rate; Bit rate; Degradation; Gain control; Interference suppression; Multiaccess communication; Performance gain; Power control;
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.1995.496896
