Title :
Improving transmit power control performance for WCDMA systems
Author_Institution :
Chunghwa Telecom Labs., Taiwan
Abstract :
Transmit power control is an important issue in the WCDMA digital cellular system. This paper proposed a new, adaptive channel energy prediction (CEP) based power control algorithm for WCDMA system by which the future channel energy is predicted using MMSE criterion. The performance of power control algorithms that recommended by 3GPP and the proposed method are compared in different mobile speeds. It is shown from our simulations that the CEP-based power control strategy has looser Eb/N0 requirement and it helps to increase the uplink capacity and extend the cell coverage when compared with the 3GPP-based method in slow and medium mobile speeds.
Keywords :
3G mobile communication; broadband networks; cellular radio; channel capacity; code division multiple access; least mean squares methods; multiuser channels; power control; radio links; radio networks; telecommunication control; 3GPP; MMSE; WCDMA digital cellular system; WCDMA systems; adaptive channel energy prediction; cell coverage; channel energy; mobile speed; power control algorithm; simulations; transmit power control performance; uplink capacity; Adaptive control; Bit error rate; Computational modeling; Fading; Multiaccess communication; Power control; Programmable control; Propagation delay; Quality of service; Radio transmitters;
Conference_Titel :
Wireless Personal Multimedia Communications, 2002. The 5th International Symposium on
Print_ISBN :
0-7803-7442-8
DOI :
10.1109/WPMC.2002.1088313
