SIGNAL DETECTING METHOD IN A COMMUNICATION SYSTEM WHICH HAS A MULTIPLE INPUT MULTIPLE OUTPUT CHANNEL IN ORDER TO HAVE AN OPTIMAL OPERATION PROPERTY

摘要

PURPOSE: A signal detecting method in a communication system which has a multiple input multiple output (MIMO) channel is provided to perform a search according to a level-by-level which is based on an estimation of a transmission signal vector by a standard of a minimum mean square error (MMSE).;CONSTITUTION: An MMSE estimation about a transmission symbol vector is performed. The covariance matrix of the MMSE estimation is determined. A triangular matrix is determined by using the covariance matrix. Accumulation metrics of the number of symbol candidate vectors which are predetermined in layerwise are determined by using the triangular matrix (309). The triangular matrix is determined according to a layerwise estimation procedure of marginal probabilities.;COPYRIGHT KIPO 2013;[Reference numerals] (301) Channel estimation; (303) Row arrangement; (305) Calculating F of phase-triangular matrix; (306) Calculating log of probability ratio; (307) Calculating matrix ( modified euclidean distance) for layer i (=M..1); (308) Calculating optimal nominee having the optimal accumulated matrix for layer i (=M..1); (AA) H (rearranged); (BB) MMSE estimation; (CC) No; (DD) Yes