Low-complexity beam-domain channel estimation and power allocation in hybrid architecture massive MIMO systems
2019 ◽
Vol 2019
(1)
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Abstract In this journal, we investigate the beam-domain channel estimation and power allocation in hybrid architecture massive multiple-input and multiple-output (MIMO) communication systems. First, we propose a low-complexity channel estimation method, which utilizes the beam steering vectors achieved from the direction-of-arrival (DOA) estimation and beam gains estimated by low-overhead pilots. Based on the estimated beam information, a purely analog precoding strategy is also designed. Then, the optimal power allocation among multiple beams is derived to maximize spectral efficiency. Finally, simulation results show that the proposed schemes can achieve high channel estimation accuracy and spectral efficiency.
2005 ◽
Vol 54
(5)
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pp. 1739-1746
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2019 ◽
Vol 107
(1)
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pp. 205-216
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2010 ◽
Vol E93-B
(8)
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pp. 2211-2214
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2008 ◽
Vol 2008
(1)
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