Information Theory, Inference & Learning Algorithms
Information Theory, Inference & Learning Algorithms
The Variational Bayes Method in Signal Processing (Signals and Communication Technology)
The Variational Bayes Method in Signal Processing (Signals and Communication Technology)
The Variational Inference Approach to Joint Data Detection and Phase Noise Estimation in OFDM
IEEE Transactions on Signal Processing
An EM-Based Forward-Backward Kalman Filter for the Estimation of Time-Variant Channels in OFDM
IEEE Transactions on Signal Processing - Part II
A QRD-M/Kalman filter-based detection and channel estimation algorithm for MIMO-OFDM systems
IEEE Transactions on Wireless Communications
Optimal training signals for MIMO OFDM channel estimation
IEEE Transactions on Wireless Communications
A road to future broadband wireless access: MIMO-OFDM-Based air interface
IEEE Communications Magazine
Adaptive MAP receiver via the EM algorithm and message passings for MIMO-OFDM mobile communications
IEEE Journal on Selected Areas in Communications
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A practical Variational Bayes (VB) iterative receiver with joint signal detection and channel estimation is proposed in this paper for MIMO-OFDM systems in time-varying multipath channel. Since the VB method provides distribution-estimates of the parameters, the soft-input soft-output (SISO) QRDM algorithm is exploited to estimate the signal distribution, and several channel estimation algorithms including the low complexity recursive channel estimation (LCRCE) algorithm are derived for the channel distribution estimation. It is noted that the LCRCE algorithm not only completely avoids computation of matrix inversion and matrix multiplication, but also greatly reduces the recursion numbers. The simulation results show that the performance loss of the proposed receiver is only 1dB for fast varying channels and less than 0.5dB for slow varying channels at the bit error rate of 10-4 after 3 iterations, compared with the optimal receiver with perfect channel state information.