Spatial multiplexing detection apparatus and method in MIMO system

摘要

Provided are a signal detection apparatus and method in a wireless communication system, and specifically a spatial multiplexing apparatus and method in a Multiple Input Multiple Output (MIMO) system . The signal detection method includes estimating channels of a received signal, and sorting the estimated channels in descending order according to a scheme; generating a subsystem of a minimum unit by nulling an arbitrary channel among the sorted channels; performing a Modified Maximum Likelihood (MML) in the subsystem of the minimum unit to calculate a number of transmission signal vectors; and calculating Euclidean distances of the number of the transmission signal vectors, and selecting a transmission signal vector having a minimum Euclidean distance.