TY - JOUR
T1 - Classical and Bayesian Linear Data Estimators for Unique Word OFDM
AU - Huemer, Mario
AU - Onic, Alexander
AU - Hofbauer, Christian
PY - 2011/12/1
Y1 - 2011/12/1
N2 - Unique word-orthogonal frequency division multiplexing (UW-OFDM) is a novel OFDM signaling concept, where the guard interval is built of a deterministic sequence - the so-called unique word - instead of the conventional random cyclic prefix. In contrast to previous attempts with deterministic sequences in the guard interval the addressed UW-OFDM signaling approach introduces correlations between the subcarrier symbols, which can be exploited by the receiver in order to improve the bit error ratio performance. In this paper we develop several linear data estimators specifically designed for UW-OFDM, some based on classical and some based on Bayesian estimation theory. Furthermore, we derive complexity optimized versions of these estimators, and we study their individual complex multiplication count in detail. Finally, we evaluate the estimators' performance for the additive white Gaussian noise channel as well as for selected indoor multipath channel scenarios.
AB - Unique word-orthogonal frequency division multiplexing (UW-OFDM) is a novel OFDM signaling concept, where the guard interval is built of a deterministic sequence - the so-called unique word - instead of the conventional random cyclic prefix. In contrast to previous attempts with deterministic sequences in the guard interval the addressed UW-OFDM signaling approach introduces correlations between the subcarrier symbols, which can be exploited by the receiver in order to improve the bit error ratio performance. In this paper we develop several linear data estimators specifically designed for UW-OFDM, some based on classical and some based on Bayesian estimation theory. Furthermore, we derive complexity optimized versions of these estimators, and we study their individual complex multiplication count in detail. Finally, we evaluate the estimators' performance for the additive white Gaussian noise channel as well as for selected indoor multipath channel scenarios.
KW - OFDM
KW - Equalizers
KW - Complexity theory
KW - Time domain analysis
KW - Receivers
KW - Bayesian methods
UR - https://ieeexplore.ieee.org/document/5985552/
U2 - 10.1109/TSP.2011.2164912
DO - 10.1109/TSP.2011.2164912
M3 - Article
SN - 1941-0476
VL - 59
SP - 6073
EP - 6085
JO - IEEE Transactions on Signal Processing
JF - IEEE Transactions on Signal Processing
IS - 12
M1 - 5985552
ER -