TY - JOUR
T1 - Detection for OFDM-AF Relay Systems under Gaussian Mixture Noise with Imperfect CSI
AU - Zhang, Jiachen
AU - Li, Feng
AU - Chen, Jiangtao
N1 - Publisher Copyright:
© 1967-2012 IEEE.
PY - 2020/5
Y1 - 2020/5
N2 - Signal detection for orthogonal frequency-division multiplexing (OFDM) amplify-and-forward (AF) relay systems, under imperfect channel state information (CSI), is studied. Also, different from the published works, non-Gaussian noise, which always exists in practical wireless communication systems, is investigated. In order to avoid underestimating the noise model, the optimization structure over the key parameters of Gaussian mixture noise, CSI and data is constructed. After that, a closed form solution in iterative manner is obtained using the theory of variational message passing (VMP) based on the factor graph. Simulation proves the effectiveness of the proposed approach.
AB - Signal detection for orthogonal frequency-division multiplexing (OFDM) amplify-and-forward (AF) relay systems, under imperfect channel state information (CSI), is studied. Also, different from the published works, non-Gaussian noise, which always exists in practical wireless communication systems, is investigated. In order to avoid underestimating the noise model, the optimization structure over the key parameters of Gaussian mixture noise, CSI and data is constructed. After that, a closed form solution in iterative manner is obtained using the theory of variational message passing (VMP) based on the factor graph. Simulation proves the effectiveness of the proposed approach.
KW - Amplify-and-forward
KW - Gaussian mixture noise
KW - OFDM
KW - channel imperfections
KW - variational Bayesian inference
UR - https://www.scopus.com/pages/publications/85085086995
U2 - 10.1109/TVT.2020.2980140
DO - 10.1109/TVT.2020.2980140
M3 - 文章
AN - SCOPUS:85085086995
SN - 0018-9545
VL - 69
SP - 5666
EP - 5671
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 5
M1 - 9034141
ER -