A Novel Recursive Algorithm for Efficient ZF-OSIC Detection in a V-BLAST System
Zuoliang Yin · KSII Transactions on Internet and Information Systems · 2011
To reduce the implementation complexity of the Vertical Bell Labs layered space-time (V-BLAST) systems with respect to the zero-forcing (ZF) criterion, a computationally efficient recursive algorithm is proposed.A fast implementation of the proposed algorithm is developed and its complexity is analyzed in detail.The proposed algorithm matches the ZF-OSIC detection well, and its three significant advantages can be demonstrated by analyses and simulations.Firstly, its speedups over the conventional ZF-OSIC with norm-based ordering, the original fast recursive algorithm (FRA) and the fastest known algorithm (FKA) in the number of flops are 1.58, 2.33 and 1.22, respectively.Secondly, a much simpler implementation than FRA and FKA can be expected.Finally, the storage requirements are lower than those of FRA and FKA.These advantages make the proposed algorithm more efficient and practical.