TY - JOUR
T1 - An Auxiliary Variable-Aided Hybrid Message Passing Approach to Joint Channel Estimation and Decoding for MIMO-OFDM
AU - Yuan, Zhengdao
AU - Zhang, Chuanzong
AU - Wang, Zhongyong
AU - Guo, Qinghua
AU - Xi, Jiangtao
PY - 2017/1/1
Y1 - 2017/1/1
N2 - This letter deals with message passing receiver design for joint channel estimation and decoding in MIMO-OFDM with unknown noise variance. The conventional factor graph representation for the system involves observation factors, which are functions of a number of variables in the form of multiplication and summation. In this work, by introducing some auxiliary variables, we further break each of the observation factors into several factors, which enables the use of hybrid mean field (MF), belief propagation (BP), and expectation propagation (EP) message passing to tackle the observation factors. It turns out that our approach is much more efficient than the existing approaches, leading to remarkable performance improvement as shown by simulation results.
AB - This letter deals with message passing receiver design for joint channel estimation and decoding in MIMO-OFDM with unknown noise variance. The conventional factor graph representation for the system involves observation factors, which are functions of a number of variables in the form of multiplication and summation. In this work, by introducing some auxiliary variables, we further break each of the observation factors into several factors, which enables the use of hybrid mean field (MF), belief propagation (BP), and expectation propagation (EP) message passing to tackle the observation factors. It turns out that our approach is much more efficient than the existing approaches, leading to remarkable performance improvement as shown by simulation results.
KW - Belief propagation (BP)
KW - expectation propagation (EP)
KW - iterative receiver
KW - mean field (MF)
KW - MIMO-OFDM
UR - http://www.scopus.com/inward/record.url?scp=85012917087&partnerID=8YFLogxK
U2 - 10.1109/LSP.2016.2632180
DO - 10.1109/LSP.2016.2632180
M3 - Journal article
AN - SCOPUS:85012917087
SN - 1070-9908
VL - 24
SP - 12
EP - 16
JO - IEEE Signal Processing Letters
JF - IEEE Signal Processing Letters
IS - 1
M1 - 7755802
ER -