SIGNAL DETECTING METHOD FOR SPATIAL MULTIPLEXING MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEMS

摘要

PURPOSE: A signal detecting method for a multiple antenna system of a spatial multiplexing mode is provided to detect a signal by using QRD-M algorithm in which the upper limit and lower limit of complexity are limited. CONSTITUTION: If an accumulated matrix of saved branches is not higher than BabaiDist(S125), it is checked whether i=Ns or not(S130). If i=Ns and the number of residual branch is 1(S135), a Babai point is recognized as the best year(S140). If the accumulated matrix of saved branches is higher than BabaiDist, branches with higher matrix are removed. The residual branch is arranged on the basis of the accumulation matrix(S160). The best branch is saved as a solution of the ULBC (Upper-Lower Bounded-Complexity) QRD-M algorithm.