By Topic

Performance analysis of link proportional power allocation for downlink soft handoff in CDMA systems

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Li-Chun Wang ; Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Lei Chen

This paper investigates the performance of current downlink power allocation mechanisms for soft handoff in CDMA systems, including the equal power allocation (EPA), quality balancing power allocation (QBPA), site selection diversity transmission (SSDT), and link proportional power allocation (LPPA). We evaluate the outage performance of these power allocation schemes from the perspectives of base station transmission power limit and power control error. Traditionally, the SSDT scheme has been viewed as the optimal solution for downlink handoff from the standpoint of power efficiency. The SSDT scheme selects the best base station from the active set to transmit downlink signals to the user. However, we find that SSDT is very sensitive to power control error as the user is at the cell boundary. Thus, with consideration of both base station power shortage and transmission control errors, LPPA exhibits the lowest outage probability when the system load is not heavy, while SSDT is the best choice only in the case of heavy traffic load.

Published in:

Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th  (Volume:4 )

Date of Conference:

17-19 May 2004