METHOD AND RECEIVER IN A WIRELESS COMMUNICATION SYSTEM

摘要

Receiver (120) and method (500) in a receiver (120), for receiving a signal from a transmitter (110) in a wireless communication system (100), based on OFDM. The method (500) comprises: receiving (501) a plurality of signals y from the transmitter (110); determining (502) a group T of REs for which the CEE is assumed to be constant; extracting (503) the determined (502) group T of REs, from the received (501) signals y; computing (504) noise- and CEE covariance matrix Rww for the extracted (503) T REs, initialised as: Rww = (N0 +Mσ2)I; computing (505) a MMSE filter WMMSE, based on the computed (504) noise- and CEE covariance matrix Rww; and obtaining (506) an MMSE estimate ^x of pay-load data x comprised in the received (501) signals y, associated with the extracted (503) T REs by applying the computed (505) filter WMMSE to the extracted (503) T REs of the received (501) signals: ^x = WMMSEy.