Outage probability analysis of downlink power allocation mechanisms in CDMA systems during soft handoff

Li-Chun Wang*, Lei Chen

*此作品的通信作者

研究成果: Conference contribution同行評審

1 引文 斯高帕斯(Scopus)

摘要

This paper presents an analytical approach to evaluate the downlink outage probability for a handoff user in code division multiple access (CDMA) systems under the lognormally shadowed and Rician fading channel subject to cochannel interference. Since soft handoff performance is related to the power allocation algorithms, we consider various downlink power allocation schemes, including the site selection diversity transmission (SSDT), the link proportional power allocation (LPPA), the equal power allocation (EPA), and the quality balancing power allocation (QBPA). From our analytical model, it is shown that SSDT is most sensitive to fast fading and co-channel interference. By contrast, LPPA can achieve better outage in the presence of fast fading at the cost of slightly sacrificing power efficiency. The proposed analytical framework can be applied to evaluate the effects of handoff thresholds, orthogonality factors of channelization codes, and Rician factors on the outage performance of soft handoff users subject to cochannel interference from other cells.

原文English
主出版物標題VTC 2005-Fall
主出版物子標題Mid Way Through the Decade - Technology Past, Present and Future
發行者Institute of Electrical and Electronics Engineers Inc.
頁面132-136
頁數5
ISBN(電子)0780391527
DOIs
出版狀態Published - 28 九月 2005
事件62nd Vehicular Technology Conference, VTC 2005 - Dallas, United States
持續時間: 25 九月 200528 九月 2005

出版系列

名字IEEE Vehicular Technology Conference
1
ISSN(列印)1550-2252

Conference

Conference62nd Vehicular Technology Conference, VTC 2005
國家/地區United States
城市Dallas
期間25/09/0528/09/05

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