EM-based poor slot update method for MIMO IDD receiver in fast time-varying channels

In this study, the authors propose an expectation-maximisation (EM)-based poor slot update method for multiple-input multiple-output (MIMO) iterative detection and decoding (IDD) receivers to increase their channel tracking capability in fast time-varying channels. The poor slots that trigger error...

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Bibliographic Details
Published in:IET communications Vol. 12; no. 8; pp. 932 - 940
Main Authors: Kim, Minsung, Cho, Jehoon, Oh, Taewon
Format: Journal Article
Language:English
Published: The Institution of Engineering and Technology 15.05.2018
Subjects:
accurate channel tracking capability
channel estimation
channel state information
channel updating technique
detection
error statistics
fast mobile environment
fast time‐varying channels
MIMO communication
MIMO IDD receiver
multiple‐output
noise figure 3.0 dB
poor slot update method
poor slots
Research Article
time‐varying channels
trigger error propagation
updated recursive least squares channel tracking algorithm
velocity 180.0 km/h
updated recursive least squares channel tracking algorithm
fast mobile environment
multiple-output
detection
fast time-varying channels
channel state information
noise figure 3.0 dB
accurate channel tracking capability
velocity 180.0 km/h
MIMO IDD receiver
trigger error propagation
poor slots
channel estimation
poor slot update method
time-varying channels
MIMO communication
error statistics
channel updating technique
ISSN:1751-8628, 1751-8636
Online Access:Get full text
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Summary:In this study, the authors propose an expectation-maximisation (EM)-based poor slot update method for multiple-input multiple-output (MIMO) iterative detection and decoding (IDD) receivers to increase their channel tracking capability in fast time-varying channels. The poor slots that trigger error propagation in a frame are selected, the channel state information is updated, and the updated recursive least squares channel tracking algorithm is executed. The accurate channel tracking capability of this new channel updating technique contributes to a 3 dB improvement in the bit error rate performance of an IDD receiver in a fast mobile environment ($\gt \!\!180\,\mathrm {km/h}$>180km/h). The authors also demonstrate that an $\sim 20-25$∼20−25% complexity reduction can be achieved under various conditions.
ISSN:1751-8628
1751-8636
DOI:10.1049/iet-com.2017.0999