A METHOD OF NON-ORTHOGONAL SPATIAL MULTIPLEXING IN A MLMO COMMUNICATION SYSTEM

摘要

A method of non-orthogonal spatial multiplexing in a multiple-input multiple-output (MIMO) communication system is proposed. The system has an acting transmitter side comprising a transmitter with a number of transmitter antennas and an acting receiver side comprising a receiver with a number of receiver antennas, a number of non-orthogonal parallel channels for data substream spatial multiplexing being generated between the transmitter and the receiver. The method comprises the following steps: a) data intended for being sent from said transmitter to said receiver is divided into a number of data streams at the transmitter side, b) the data streams are weighted using filter weights, said weighting being applied to the transmitter side of the system only, c) the data streams are sent from the transmitter to the receiver via the non-orthogonal parallel channels, d) and the data streams are received and decoded by the receiver. In multiple user communication systems, each user independently detects the data that were destined for that user. In a single user communication system the data streams are after step d) recombined at the receiver side to recreate the original data stream.