CHANNEL TRACKING FOR MIMO RECEIVERS

摘要

A method of processing a signal (y<SUB>w</SUB>) encoded on a channel (H<SUB>w</SUB>) in a wireless communications network is disclosed. The method includes, determining (204) an initial channel estimate, represented by an initial channel estimation matrix (H), on the basis of one or more pilot symbols received on the channel. Next an initial channel estimation matrix (H) is decomposed (206) into a product of at least two canonical form matrices. Payload data symbol are recovered (210) from a corresponding received data symbol on the basis of at least one or more of the canonical form matrices. Then the recovered payload data symbol are encoded (212) to generate (216) a feedback data symbol. An error value is calculated on the basis of a feedback data symbol and its corresponding received data symbol and is compared (220) to a threshold. In the event that the error value is greater than the threshold (218), a further matrix decomposition is performed to generate at least one updated canonical form matrix. These steps can be repeated using an updated canonical form matrix.