Training Beam Sequence Design for Millimeter-Wave MIMO Systems: A POMDP Framework

In this paper, adaptive training beam sequence design for efficient channel estimation in large millimeter-wave (mmWave) multiple-input multiple-output (MIMO) channels is considered. By exploiting the sparsity in large mmWave MIMO channels and imposing a Markovian random walk assumption on the movem...

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Bibliographic Details
Published in:IEEE transactions on signal processing 2016-03, Vol.64 (5), p.1228-1242
Main Authors: Seo, Junyeong, Sung, Youngchul, Lee, Gilwon, Kim, Donggun
Format: Article
Language:English
Subjects:
Algorithm design and analysis
Algorithms
Antenna arrays
Channel estimation
Channels
Design analysis
Design engineering
Economic models
Markov analysis
Markov processes
Mathematical models
Millimeter wave
MIMO
Performance evaluation
Policies
POMDP
Receivers
Training
training signal design
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Summary:In this paper, adaptive training beam sequence design for efficient channel estimation in large millimeter-wave (mmWave) multiple-input multiple-output (MIMO) channels is considered. By exploiting the sparsity in large mmWave MIMO channels and imposing a Markovian random walk assumption on the movement of the receiver and reflection clusters, the adaptive training beam sequence design and channel estimation problem is formulated as a partially observable Markov decision process (POMDP) problem that finds non-zero bins in a two-dimensional grid. Under the proposed POMDP framework, optimal and suboptimal adaptive training beam sequence design policies are derived. Furthermore, a very fast suboptimal greedy algorithm is developed based on a newly proposed reduced sufficient statistic to make the computational complexity of the proposed algorithm low to a level for practical implementation. Numerical results are provided to evaluate the performance of the proposed training beam design method. Numerical results show that the proposed training beam sequence design algorithms yield good performance.
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2015.2496241