Effect of the Power Ramping under Retransmission in an ARQ for the WCDMA Downlink in One Path Rayleigh Fading Channel

Seung-Hoon HWANG

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B    No.3    pp.1024-1026
Publication Date: 2006/03/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.3.1024
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Terrestrial Radio Communications
Keyword: 
power ramping,  automatic repeat request,  Rayleigh fading channel,  

Full Text: PDF(140.3KB)>>
Buy this Article


Summary: 
In this paper, we propose and analyze a scheme for wireless channels, which is the combination of an automatic repeat request (ARQ) scheme and power ramping. The power ramping is used for more reliable downlink data transmission. This technique gradually increases the transmission power at each retransmission attempt. Simulation results demonstrate that when the power step size is 0.5 dB, the average throughput gain may be as high as 2.3% to 5.4% with properly selected parameters.