Computationally efficient resource allocation for multiuser OFDM systems

The optimal subcarrier, bit and power allocation problem for multiuser OFDM systems has been investigated. To achieve a numerically efficient solution the problem is divided into two separate optimization problems: one for subcarrier allocation and one for bit and power allocation. A novel and computationally efficient algorithm is presented for the bit and power allocation problem which results in a near-optimal solution. An efficient suboptimal solution is also presented for the subcarrier allocation problem. Numerical results are presented to show that the proposed methods achieve performance close to that of the optimal solution with considerably less computational complexity than those previously reported in the literature

[1]  John M. Cioffi,et al.  A practical discrete multitone transceiver loading algorithm for data transmission over spectrally shaped channels , 1995, IEEE Trans. Commun..

[2]  Jae Hong Lee,et al.  Efficient subcarrier and bit allocation algorithm for OFDMA system with adaptive modulation , 2004, 2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514).

[3]  J. Campello.  Practical bit loading for DMT , 1999, 1999 IEEE International Conference on Communications (Cat. No. 99CH36311).

[4]  Andrea J. Goldsmith,et al.  Degrees of freedom in adaptive modulation: a unified view , 2001, IEEE Trans. Commun..

[5]  Khaled Ben Letaief,et al.  Multiuser OFDM with adaptive subcarrier, bit, and power allocation , 1999, IEEE J. Sel. Areas Commun..

[6]  Chi-Ying Tsui,et al.  A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission , 1999, Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324).

[7]  Rick S. Blum,et al.  Adaptive modulation for variable-rate OFDM systems with imperfect channel information , 2002, Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367).

[8]  Khaled Ben Letaief,et al.  Multiuser adaptive subcarrier-and-bit allocation with adaptive cell selection for OFDM systems , 2004, IEEE Transactions on Wireless Communications.

[9]  Stephen P. Boyd,et al.  Convex Optimization , 2004, Algorithms and Theory of Computation Handbook.

[10]  迪克·胡斯·哈托格斯.  Ensemble modem structure for imperfect transmission media , 1986 .

[11]  Kwang Bok Lee,et al.  Transmit power adaptation for multiuser OFDM systems , 2003, IEEE J. Sel. Areas Commun..

[12]  Gordon L. Stüber.  Principles of mobile communication , 1996 .

[13]  Didem Kivanc-Tureli,et al.  Computationally efficient bandwidth allocation and power control for OFDMA , 2003, IEEE Trans. Wirel. Commun..

[14]  Richard R. Shively,et al.  An efficient bit-loading algorithm for DMT applications , 2000, IEEE Communications Letters.

[15]  Robert F. H. Fischer,et al.  A new loading algorithm for discrete multitone transmission , 1996, Proceedings of GLOBECOM'96. 1996 IEEE Global Telecommunications Conference.

[16]  John M. Cioffi,et al.  Multi-user discrete bit-loading for DMT-based DSL systems , 2002, Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE.

[17]  Yung-Fang Chen,et al.  A real-time joint subcarrier, bit, and power allocation scheme for multiuser OFDM-based systems , 2004, 2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514).

[18]  Yong-Hwan Lee,et al.  Frequency-time domain transmit power adaptation for OFDM systems in multiuser environment , 2002 .