Title :
A Dual-Lattice View of V-BLAST Detection
Author :
Ling, Cong ; Gan, Lu ; Mow, Wai Ho
Author_Institution :
Dept. of Electron. Eng., King´´s Coll., London
Abstract :
In this paper, we present a new view of the vertical Bell Labs layered space-time (V-BLAST) system by interpreting the detection process on the dual lattice, and propose two O(N3)-complexity ordering algorithms. One algorithm updates the dual basis by using the backward Greville formula; the other is to apply the sorted Gram-Schmidt orthogonalization to the dual basis. We demonstrate the connection between the two algorithms as well as their relations with existing algorithms. The dual-lattice view does not only results in computational savings, it also seamlessly integrate the ordering and nulling processes (i.e., in a pipeline manner)
Keywords :
MIMO communication; computational complexity; demodulation; matrix algebra; multiplexing; orthogonal codes; space-time codes; vectors; wireless channels; MIMO channels; V-BLAST detection process; complexity ordering algorithms; dual-lattice view; nulling vectors; orthogonalization; spatial multiplexing; vertical Bell Labs layered space-time system; Conferences; Educational institutions; Gallium nitride; Information theory; Lattices; MIMO; Matrix decomposition; Multiaccess communication; Quadrature amplitude modulation; Silicon carbide;
Conference_Titel :
Information Theory Workshop, 2006. ITW '06 Chengdu. IEEE
Conference_Location :
Chengdu
Print_ISBN :
1-4244-0067-8
Electronic_ISBN :
1-4244-0068-6
DOI :
10.1109/ITW2.2006.323845