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In this paper, a new joint symbol detection and channel tracking algorithm is proposed for the coded MIMO-OFDM systems over time-varying frequency-selective fading channels. The iterative detection/decoding and channel estimation are iteratively employed based on the Variational Bayes expectation-maximization (VBEM) algorithm to improve the system performance. A modified list sphere decoder (LSD)...
In this paper, a new joint symbol detection and channel estimation algorithm is proposed for MIMO-OFDM systems over frequency-selective fading channels using the variational Bayesian expectation-maximization (VBEM) algorithm. Since the VBEM algorithm can provide distribution-estimates of the parameters, the statistical information about the channel uncertainty is exploited to improve the evaluation...
Channel estimation plays an important role in CDMA systems. The main obstacles to channel estimation accuracy are the time variant character of the channel and noises at the receiver. When linear interpolation channel estimation algorithm is employed, these two factors are always contradictory to each other. In this paper, for the same interpolation density, this compromise is analyzed by comparing...
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