Optimal Traffic-to-Pilot Power Ratio in CDMA Uplink

Dedicated pilot is used in CDMA uplink to facilitate coherent reception. Traffic-to-Pilot power ratio (T/P) is an important system parameter that determines system performance and QoS. Previous work has obtained the optimal T/P for CDMA uplink through simulations. In this paper, we propose a theoretical method to achieve the optimal T/P that minimizes the average total uplink transmission power (i.e., pilot plus traffic channel power) of a mobile station with the given link quality. Through the analyses, this paper obtains that the optimal T/P is independent of channel profile in the case of low velocity. At the same time, the optimal T/P has a small variation over different environments

[1]  Jian Gu,et al.  Variability study for 3G and beyond mobile communications , 2002, IEEE Wirel. Commun..

[2]  Edward G. Tiedemann,et al.  cdma2000 reverse link: design and system performance , 2000, Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152).

[3]  Arnab Das,et al.  Link error prediction for wireless system simulations , 2004, 2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733).

[4]  Fuyun Ling.  Optimal reception, performance bound, and cutoff rate analysis of references-assisted coherent CDMA communications with applications , 1999, IEEE Trans. Commun..