Patent ID: 7953164

Claim:
A system for performing channel state information (CSI)-aided least square (LS) equalization on a signal in an OFDM system comprising: a receiver stage for receiving a modulated signal; a Fast Fourier Transform (FFT) demodulation stage for demodulating the received modulated signal to produce a FFT demodulated signal R m (k); a channel estimation stage for processing the FFT demodulated signal to provide an output signal corresponding to a channel frequency response (CFR) H m (k); an equalization stage arranged to process the output signal from the channel estimation stage to produce a CSI signal which is derived from the square of the CFR corresponding to the power of the CFR, the equalization stage being arranged to use the CFR to operate on the FFT demodulated signal from the demodulation stage to produce an LS equalized demodulated output signal Â m (k), wherein Â m (k)=R m (k)/H m (k), and further arranged to use the CSI signal to operate on each data sub-carrier of the LS equalized demodulated output signal to produce a CSI-aided LS equalized demodulated output signal Ā m (k), wherein Ā m (k)=CSI k ·Â m (k); and a decoding chain for decoding the CSI-aided LS equalized demodulated output signal, wherein the decoding chain includes a de-mapper stage for demapping the CSI-aided LS equalized demodulated output signal and wherein direct utilization of said CSI signal is completed prior to the decoding chain decoding and demapping the CSI-aided LS equalized demodulated output signal.