Alexander Onic, Mario Huemer,
"Noise Interpolation for Unique Word OFDM"
, in IEEE Signal Processing Letters, Vol. 21, Nummer 7, Seite(n) 814-818, 7-2014, ISSN: 1070-9908
Noise Interpolation for Unique Word OFDM
Sprache des Titels:
Unique word-orthogonal frequency division multiplexing (UW-OFDM) is known to feature an excellent bit error ratio performance when compared to conventional OFDM using cyclic prefixes (CP). In recent papers classical and Bayesian linear data estimators as well as the non-linear sphere decoding (SD) approach have been investigated in the UW-OFDM context. In general, the remaining error samples after a linear data estimation in UW-OFDM are correlated. In this work, noise interpolation
(NI) is proposed, which uses preliminary data decisions together
with Wiener interpolation to exploit these correlations. It turns out
that the selection of samples to be used for NI is crucial. With the
sample selection policy suggested in this work, NI clearly outperforms
LMMSE data estimation, and due to its lower complexity compared to SD, it can be regarded as an attractive compromise for UW-OFDM reception.