[KSCI] Korea Science Citation Index Service

Margin Adaptive Optimization in Multi-User MISO-OFDM Systems under Rate Constraint

Wei, Chuanming (PCN & SS Lab., Department of EEIS, University of Science and Technology of China)
Qiu, Ling (PCN & SS Lab., Department of EEIS, University of Science and Technology of China)
Zhu, Jinkang (PCN & SS Lab., Department of EEIS, University of Science and Technology of China)

Publication Information

Journal of Communications and Networks / v.9, no.2, 2007 , pp. 112-117 More about this Journal

Abstract

In this paper, we focus on the total transmission power minimization problem for downlink beamforming multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems while ensuring each user's QoS requirement. Although the linear integer programming (LIP) solution we formulate provides the performance upper bound of the margin adaptive (MA) optimization problem, it is hard to be implemented in practice due to its high computational complexity. By regarding each user's equivalent channel gain as approximate independent values and using iterative descent method, we present a heuristic MA resource allocation algorithm. Simulation results show that the proposed algorithm efficiently converges to the local optimum, which is very close to the performance of the optimal LIP solution. Compared with existing space division multiple access (SDMA) OFDM systems with or without adaptive resource allocation, the proposed algorithm achieves significant performance improvement by exploiting the frequency diversity and multi-user diversity in downlink multiple-input single-output (MISO) OFDM systems.

Keywords

Beamforming; bit error rate (BER); linear integer programming (LIP); margin adaptive (MA); multiple-input single-output orthogonal frequency division multiplexing (MISO-OFDM);

Citations & Related Records

Times Cited By Web Of Science : 0 (Related Records In Web of Science)
Times Cited By SCOPUS : 0

Reference

1	I. Kim, H. Lee, B. Kim, and Y. Lee, 'On the use of linear programming for dynamic subchannel and bit allocation in multiuser OFDM,' in Proc. IEEE GLOBECOM, vol. 6, Nov. 2001, pp. 3648-3652
2	I. Koutsopoulos, L. Tassiulas, 'Adaptive resource allocation in SDMAbased wireless broadband networks with OFDM signaling,' in Proc. IEEE INFOCOM, vol. 3, June 2002, pp. 1376-1385
3	L. Choi and R. D. Murch, 'A transmit preprocessing technique for multiuser MIMO systems using a decomposition approach,' IEEE Trans. Wireless Commun., vol. 3, no. 1, pp. 20-24, Jan. 2004 DOI ScienceOn
4	H. Kim, J. Kwak, J. Choi, and J. Lee, 'Efficient subcarrier and bit allocation algorithm for OFDMA system with adaptive modulation,' in Proc. IEEE VTC-spring, vol. 3, May 2004, pp. 1816-1820
5	L. Guo and Y. Huang, 'An opportunistic downlink MIMO-OFDM scheme,' in Proc. IEEE ICASSP, vol. 4, 2006, pp. 285-288
6	Y. M. Tsang and R. S. Cheng, 'Optimal resource allocation in SDMNmultiinput-single-output/OFDM systems under QoS and power constraints,' in Proc. IEEE WCNC, vol. 3, Mar. 2004, pp. 1595-1600
7	S. Thoen, L. Van der Perre, M. Engels, and H. De Man, 'Adaptive loading for OFDMlSDMA-based wireless networks,' IEEE Trans. Commun., vol. 50, no. 11, pp. 1798-1810, Nov. 2002 DOI ScienceOn
8	C. Y. Wong, R. S. Cheng, K. B. Lataief, and R. D. Murch, 'Multiuser OFDM with adaptive subcarrier, bit, and power allocation,' IEEE J. Sel. Areas Commun., vol. 17, no. 10,pp. 1747-1758, Oct. 1999 DOI ScienceOn
9	J. M. Cioffi, The Essential Merit of Bit-swapping, ANSI Contrib. T1E1.4/98-318, Nov. 1998
10	Y. J. Zhang and K. B. Letaief, 'Adaptive resource allocation for multiaccess MIMO OFDM systems with matched filtering,' IEEE Trans. Commun., vol. 53, no. 11, pp. 1810-1816, Nov. 2005 DOI ScienceOn
11	T. J. Willink and P. H. Wittke, 'Optimization and performance evaluation of multicarrier transmission,' IEEE Trans. Inf. Theory, vol. 43, no. 2, pp. 426-440, Mar. 1997 DOI ScienceOn
12	S. T. Chung and A. J. Goldsmith, 'Degree of freedom in adaptive modulation: A unified view,' IEEE Trans. Commun., vol. 49, no. 9, pp. 1561-1571, Sept. 2001 DOI ScienceOn