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Sungmook Lim, Hano Wang, Hyungjong Kim, and Daesik Hong,"Mean Value-based Power Allocation without Instantaneous CSI Feedback in Spectrum Sharing Systems" IEEE Trans. Wireless Comm., March 2012
[IEEE Trans. Wireless Commun.]
조회 56303
Status : | Published |
---|---|
Date : | 2012-03 |
Title : | Mean Value-Based Power Allocation without Instantaneous CSI Feedback in Spectrum Sharing Systems |
Authors : | Sungmook Lim, Hano Wang, Hyungjong Kim and Daesik Hong |
Journal : | IEEE Transactions on Wireless Communications |
Abstract : | In this paper, we investigate a power allocation method without feedback of the instantaneous channel gain between a secondary transmitter (ST) and a primary receiver (PR) in spectrum sharing systems where channel information between the ST and the PR is outdated. We propose a mean value-based power allocation scheme (MVPA), which uses only the mean value of the channel gain of the ST-PR link. The proposed MVPA satisfies the interference outage constraint at the PR without feedback of the instantaneous channel information, which enables MVPA to reduce feedback burden. We also derive the ergodic capacity based on MVPA in closed-form and compare the ergodic capacity based on MVPA with that of a power allocation method using the outdated channel information instantaneously. Through the comparison, we convincingly demonstrate that MVPA without feedback of instantaneous channel information provides more reliable and superior capacity performance by reducing capacity loss from which the power allocation method using the outdated channel information severely suffers. |
URL : | http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6151772 |
Download : | http://mirinae.yonsei.ac.kr/?module=file...26754847e2 |
Sungmook Lim; Hano Wang; Hyungjong Kim; Daesik Hong; , "Mean Value-Based Power
Allocation without Instantaneous CSI Feedback in Spectrum Sharing Systems,"
Wireless Communications, IEEE Transactions on , vol.11, no.3, pp.874-879,
March 2012
doi: 10.1109/TWC.2012.020712.102197
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6151772&isnumber=6165622
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