TY - JOUR
T1 - A fast subcarrier, bit, and power allocation algorithm for multiuser OFDM-based systems
AU - Chen, Yung Fang
AU - Chen, Jean Wei
N1 - Funding Information:
Manuscript received August 31, 2003; revised July 13, 2005, February 13, 2007, and June 12, 2007. This work was supported by the National Science Council, Taiwan, R.O.C., under Contract NSC 96-2219-E-008-004. The review of this paper was coordinated by Prof. J. W. Lee.
PY - 2008/3
Y1 - 2008/3
N2 - In this paper, we propose a real-time subcarrier, bit, and power allocation algorithm for orthogonal frequency-division multiplexing-based multiuser communication systems in downlink transmission. Assuming that base stations know the channel gains of all subcarriers of all users, the proposed loading algorithm tries to minimize the required transmit power while satisfying the rate requirement and data error rate constraint of each user. The novel algorithm simultaneously determines subcarrier, bit, and power allocation by enhancing the suboptimal algorithm by Wong et al while having the same computational complexity. The proposed scheme offers better performance in terms of transmit power than that of Wong et al, as demonstrated in the simulation results, whereas the performance of the scheme in Wong et al was close to that of the optimal solution.
AB - In this paper, we propose a real-time subcarrier, bit, and power allocation algorithm for orthogonal frequency-division multiplexing-based multiuser communication systems in downlink transmission. Assuming that base stations know the channel gains of all subcarriers of all users, the proposed loading algorithm tries to minimize the required transmit power while satisfying the rate requirement and data error rate constraint of each user. The novel algorithm simultaneously determines subcarrier, bit, and power allocation by enhancing the suboptimal algorithm by Wong et al while having the same computational complexity. The proposed scheme offers better performance in terms of transmit power than that of Wong et al, as demonstrated in the simulation results, whereas the performance of the scheme in Wong et al was close to that of the optimal solution.
KW - Bit loading
KW - Multiuser orthogonal frequency-division multiplexing (OFDM)
KW - Subcarrier allocation
UR - http://www.scopus.com/inward/record.url?scp=41949132480&partnerID=8YFLogxK
U2 - 10.1109/TVT.2007.907029
DO - 10.1109/TVT.2007.907029
M3 - 期刊論文
AN - SCOPUS:41949132480
SN - 0018-9545
VL - 57
SP - 873
EP - 881
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 2
ER -