TY - JOUR
T1 - Reduced complexity subcarrier allocation schemes for DFT-precoded OFDMA uplink systems
AU - Pao, Wei Cheng
AU - Chen, Yung Fang
N1 - Funding Information:
Manuscript received May 15, 2009; revised November 18, 2009 and April 17, 2010; accepted June 14, 2010. The associate editor coordinating the review of this letter and approving it for publication was D. Gesbert. This work was supported by the National Science Council, Taiwan, R.O.C., under Contract NSC 98-2221-E-008-036. W.-C. Pao and Y. F. Chen are with the Department of Communication Engineering, National Central University, Jung-li City, Taoyuan, Taiwan, R.O.C. (e-mail: [email protected], [email protected]). Digital Object Identifier 10.1109/TWC.2010.070910.090709
PY - 2010/9
Y1 - 2010/9
N2 - A resource allocation problem of maximizing total achievable rates for multi-user DFT-precoded orthogonal frequency division multiplexing (OFDM) uplink systems is investigated in this paper. A suboptimal subcarrier allocation scheme is proposed, which uses a proposed spectral efficiency enhancement parameter as an index to assign subcarriers to users. The proposed scheme has a lower computational complexity than that of the existing scheme which is shown to be close to the multiuser waterfilling solution. The simulation results show the proposed suboptimal scheme outperforms the existing scheme. Besides, an iterative subcarrier allocation scheme is proposed to improve the performance.
AB - A resource allocation problem of maximizing total achievable rates for multi-user DFT-precoded orthogonal frequency division multiplexing (OFDM) uplink systems is investigated in this paper. A suboptimal subcarrier allocation scheme is proposed, which uses a proposed spectral efficiency enhancement parameter as an index to assign subcarriers to users. The proposed scheme has a lower computational complexity than that of the existing scheme which is shown to be close to the multiuser waterfilling solution. The simulation results show the proposed suboptimal scheme outperforms the existing scheme. Besides, an iterative subcarrier allocation scheme is proposed to improve the performance.
KW - Orthogonal frequency division multiplexing (OFDM)
KW - orthogonal frequency division multiple access (OFDMA)
KW - resource allocation
KW - subcarrier allocation
UR - https://www.scopus.com/pages/publications/77956927107
U2 - 10.1109/TWC.2010.070910.090709
DO - 10.1109/TWC.2010.070910.090709
M3 - 期刊論文
AN - SCOPUS:77956927107
SN - 1536-1276
VL - 9
SP - 2701
EP - 2706
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 9
M1 - 5518772
ER -