Patent ID: 8861569

Claim:
A method for estimating the uplink receiver channel in a wireless communication system having a transmitter and a receiver, the method comprising: providing a transmitter and an uplink receiver for communication with the wireless communication system, wherein uplink receiver channels are calculated using a reduced complexity minimum mean squared error (MMSE) value, H red — cmplx , given by the equation: H red — cmplx =R HH ( R HH +β/SNR×I) −1 H LS to estimate a channel for the uplink receiver, wherein: H LS is the least squares estimate of the channel, the value R HH =E[HH*] is the frequency domain channel correlation matrix, SNR is the average signal-to-noise ratio, I is the identity matrix, and β is a constant, wherein the R HH matrix is dependent only on the subcarrier spacing and the root mean square (r.m.s.) delay spread of the channel for a Long Term Evolution (LTE) network uplink transmission; and wherein: for QPSK constellation, β=1; for 16 QAM constellation, β=0.5294, and for 64-QAM transmission, β=0.3724.