Optimum and sub-optimum multiuser detection based on sphere decoding for multi-carrier code division multiple access systems
作者： L. Brunel
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摘要: When performed using an exhaustive search, the maximum likelihood (ML) joint detection of all users in a multi-carrier code division multiple access (MC-CDMA) system has prohibitive complexity, growing exponentially with number and bits each modulation symbol. An ML multiuser algorithm previously been proposed, complexity polynomially users, independent size. The MC-CDMA is modelled as sphere packing lattice low-complexity optimum decoder, called applied to jointly detect users. We propose sub-optimum simplifications, based on orthogonal projection received signal facet constellation, further decrease complexity. Simulation results are shown up 64 transmitting 16-QAM symbols.
sci-hub.se 参考文章(8)
E. Bannai, N. J. A. Sloane, J. H. Conway, Sphere packings, lattices, and groups ,(1987)
J.-F. Hélard, J.-Y. Baudais, J. Citerne, Linear MMSE detection technique for MC-CDMA Electronics Letters. ,vol. 36, pp. 665- 666 ,(2000) , 10.1049/EL:20000532
E. Viterbo, J. Bouros, A universal lattice code decoder for fading channels IEEE Transactions on Information Theory. ,vol. 45, pp. 1639- 1642 ,(1999) , 10.1109/18.771234
A. Chouly, A. Brajal, S. Jourdan, Orthogonal multicarrier techniques applied to direct sequence spread spectrum CDMA systems global communications conference. pp. 1723- 1728 ,(1993) , 10.1109/GLOCOM.1993.318364
L. Brunel, J. Boutros, Euclidean space lattice decoding for joint detection in CDMA systems Proceedings of the 1999 IEEE Information Theory and Communications Workshop (Cat. No. 99EX253). pp. 129- ,(1999) , 10.1109/ITCOM.1999.781460
S. Hara, R. Prasad, Overview of multicarrier CDMA IEEE Communications Magazine. ,vol. 35, pp. 126- 133 ,(1997) , 10.1109/35.642841
L. Brunel, Optimum multiuser detection for MC-CDMA systems using sphere decoding personal indoor and mobile radio communications. ,vol. 1, ,(2001) , 10.1109/PIMRC.2001.965383