Patent ID: 8320507
Filing Date: 2012-11-27
Classification: H04B,H04J,H04L

Abstract:
1. A receiving device for a mobile communication system employing a single-carrier multiple-input multiple-output (MIMO) transmission scheme where Fourier-transformed and weighted symbols in a transmission symbol sequence are mapped to subcarriers, inverse-Fourier-transformed, and then transmitted from multiple transmitting antennas, the receiving device comprising: an extracting unit configured to Fourier-transform signals received by multiple receiving antennas and to extract signal components mapped to the subcarriers from the signals; and a signal detection unit configured to estimate the symbols transmitted via the subcarriers by applying a QR decomposition algorithm to the extracted signal components, wherein the signal detection unit includes a decomposition unit configured to obtain a unitary matrix such that a product of the unitary matrix and a triangular matrix equals a product of a weight matrix determining a correspondence between the transmission symbol sequence and the subcarriers and a channel matrix indicating radio channel conditions between the transmitting antennas and the receiving antennaes; and an estimation unit configured to estimate candidates of the symbols transmitted from the transmitting antennas based on the triangular matrix and a vector obtained by multiplying a received vector, which includes the signal components received by the receiving antennas, by the unitary matrix.