Title :
Performance of precoded OFDM with channel estimation error
Author :
Ahmed, Khawza I. ; Tepedelenlioglu, Cihan ; Spanias, Andreas
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
fDate :
3/1/2006 12:00:00 AM
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.
Keywords :
OFDM modulation; channel coding; channel estimation; diversity reception; error statistics; precoding; OFDM precoding; channel estimation error; channel state information; coding gain; diversity reduction; group linear constellation precoding; optimal power allocation scheme; orthogonal frequency division multiplexing; pairwise error probability; Channel estimation; Channel state information; Digital TV; Error probability; Frequency division multiplexing; Least squares approximation; Mean square error methods; OFDM; Pairwise error probability; Performance analysis; Linear minimum mean square error (LMMSE); optimal training; orthogonal frequency-division multiplexing (OFDM); pairwise error probability (PEP);
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2005.862898
