Hybrid precoder for massive MIMO systems with coverage constraint

Hybrid architecture has been shown to be cost effective for massive multi-input multi-out (MIMO) systems, where analog precoder is used to form narrow beams towards users for data transmission with reduced number of radio frequency chains. However, besides the user-specific data, a wideband massive...

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Published in:IEEE/CIC International Conference on Communications in China - Workshops (Online) pp. 38 - 43
Main Authors: Lingxiao Kong, Shengqian Han, Chenyang Yang
Format: Conference Proceeding
Language:English
Published: IEEE 01.11.2015
Subjects:
Broadcasting
Data communication
MIMO
OFDM
Optimization
Radio frequency
Wideband
ISSN:2474-9133
Online Access:Get full text
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Abstract Hybrid architecture has been shown to be cost effective for massive multi-input multi-out (MIMO) systems, where analog precoder is used to form narrow beams towards users for data transmission with reduced number of radio frequency chains. However, besides the user-specific data, a wideband massive MIMO system needs to broadcast control signaling intended for all users simultaneously, which requires wide beams to ensure the coverage. In this paper, we study the wideband hybrid precoder for downlink space-division multi-access and orthogonal frequency division multi-access (SDMA-OFDMA) massive MIMO systems, aimed at minimizing the total transmit power of the base station, subject to the coverage constraint of signaling broadcasting and data rate requirements of users. We first derive an upper bound of coverage probability under general spatially correlated channels, with which a hybrid precoder without requiring the iteration between analog and digital precoders is proposed. Simulation results show that under the same data rate requirement and coverage constraint, the proposed hybrid precoder can effectively reduce the total transmit power compared to the method with narrow-beam analog precoder only based on data rate requirements.
AbstractList Hybrid architecture has been shown to be cost effective for massive multi-input multi-out (MIMO) systems, where analog precoder is used to form narrow beams towards users for data transmission with reduced number of radio frequency chains. However, besides the user-specific data, a wideband massive MIMO system needs to broadcast control signaling intended for all users simultaneously, which requires wide beams to ensure the coverage. In this paper, we study the wideband hybrid precoder for downlink space-division multi-access and orthogonal frequency division multi-access (SDMA-OFDMA) massive MIMO systems, aimed at minimizing the total transmit power of the base station, subject to the coverage constraint of signaling broadcasting and data rate requirements of users. We first derive an upper bound of coverage probability under general spatially correlated channels, with which a hybrid precoder without requiring the iteration between analog and digital precoders is proposed. Simulation results show that under the same data rate requirement and coverage constraint, the proposed hybrid precoder can effectively reduce the total transmit power compared to the method with narrow-beam analog precoder only based on data rate requirements.
Author Chenyang Yang
Lingxiao Kong
Shengqian Han
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  organization: Sch. of Electron. & Inf. Eng., Beihang Univ., Beijing, China
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Snippet Hybrid architecture has been shown to be cost effective for massive multi-input multi-out (MIMO) systems, where analog precoder is used to form narrow beams...
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StartPage 38
SubjectTerms Broadcasting
Data communication
MIMO
OFDM
Optimization
Radio frequency
Wideband
Title Hybrid precoder for massive MIMO systems with coverage constraint
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