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Browse Journals & Magazines > Wireless Communications, IEEE ...> Volume:4 Issue:6 Help

Analysis of power ramping schemes for UTRA-FDD random access channel

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2 Author(s)
Yang Yang ; Dept. of Electron. & Electr. Eng., Univ. Coll. London, UK ; Yum, T.P.

The random access channel (RACH) in a universal terrestrial radio access-frequency division duplex (UTRA-FDD) system is a contention-based channel mainly used to carry control information from mobile stations (MS) to base stations (BS). The transmission of a random access request contains two steps: preamble transmission and message transmission. In preamble transmission, the power ramping technique is used to favor the delayed preambles by stepping up the transmission power after each unsuccessful access. In doing so, the success of transmitting a long-delayed preamble is increased due to the power capture effect. This paper analyzes the blocking, throughput, and delay performance of preamble transmission under three power ramping schemes with fixed, linear, and geometric step sizes. The interference caused by different power ramping schemes is also compared.

Published in:
Wireless Communications, IEEE Transactions on  (Volume:4 ,  Issue: 6 )

Date of Publication: Nov. 2005

Page(s):
2688 - 2693
ISSN :
1536-1276
INSPEC Accession Number:
8676091
Digital Object Identifier :
10.1109/TWC.2005.857993
Product Type:
Journals & Magazines
Date of Current Version :
05 December 2005
Issue Date :
Nov. 2005
Sponsored by :
IEEE Communications Society

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