Performance of precoded OFDM with channel estimation error

Authors:
K.I. Ahmed;C. Tepedelenlioglu;A. Spanias
Affiliations:
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA;-;-
Venue:
IEEE Transactions on Signal Processing
Year:
2006

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Abstract

Pair-wise error probability (PEP) is analyzed in the presence of channel estimation error (CEE) for group linear constellation precoded orthogonal frequency division multiplexing (GLCP-OFDM). It is observed that the CEE does not reduce the diversity order but contributes to a loss of coding gain. Furthermore, the proposed optimal power allocation scheme based on the derived PEP has performance that converges to the performance with perfect channel state information when the number of subcarriers to the channel length ratio increases.