Patent ID: 8396155
Filing Date: 2013-03-12
Classification: H04L

Abstract:
1. A method for detecting a signal in the wireless communication systems using the Multiple Input Multiple Output (MIMO), the method comprising: determining a vector of signals received by several receiving antennas; estimating a channel between a plurality of transmitting antennas and a plurality of receiving antennas; forming a channel matrix; establishing, based on the channel state data, an order for detecting symbols transmitted by different ones of the plurality of transmitting antennas; calculating weight coefficients by a weight calculator that receives signal to noise information and established order and calculates weight for detecting the symbols in the MIMO system; detecting the symbols serially in the established order on the basis of the received signal vector; calculating the Euclidean distance between the detected symbols and the symbol constellation points; determining values of the Logarithmic Likelihood Ratio (LLR) for estimating a soft output bit probability, and forming a group of the most probable candidate symbols from the points of the symbol constellation, wherein the established order is based on a minimum mean square error (MMSE) filtering using signal/noise (SNR) information or based on a maximal weight of a channel matrix column.