METHOD OF DECODING A RECEIVED SC-FDMA SYMBOL IN A RECEIVER IN A OFDM COMMUNICATION SYSTEM, A RECEIVER, AN APPARATUS, AN OFDM COMMUNICATION SYSTEM AND A COMPUTER PROGRAM PRODUCT

摘要

A method of decoding a received SC-FDMA symbol in a receiver in a OFDM communication system is described. The method comprises calculating an approximate constellation energy {circumflex over (K)} from channel matrices H_i for all subcarriers i, a noise covariance matrix S, and a data signal power matrix C associated with the OFDM symbol, an approximate constellation energy {circumflex over (K)}. The approximate constellation energy {circumflex over (K)} is calculated according to:; $$ Q_i=H_i^HS^{-1}H_i;$$ $$ \hat{Q}=\frac{1}{N_{\mathrm{sc}}}\sum _{i=0}^{N_{\mathrm{sc}}-1}Q_i;$$ $$ \hat{K}=\mathrm{diag}\left({\left(\hat{Q}+C^{-1}\right)}^{-1}\hat{Q}\right)$$ ;The method further comprises decoding the received symbol using at least the associated approximate constellation energy {circumflex over (K)}. Also, a receiver, an apparatus, an OFDM communication system and a computer program product for such decoding are described.