Journal
IEEE TRANSACTIONS ON SIGNAL PROCESSING
Volume 65, Issue 20, Pages 5289-5304Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSP.2017.2723353
Keywords
Hybrid precoding design; millimeter wave communication; energy efficient communication; successive convex approximation; power allocation
Categories
Funding
- National Natural Science Foundation of China [61471120, 61571107, 61422105]
- Natural Science Foundation of Jiangsu Province [BK20160069]
- Research Project of Jiangsu Province [BE2015156]
- Alexander von Humboldt Foundation
- FNR, Luxembourg under the project ECLECTIC
- European project H2020 SANSA [645047]
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In millimeter-wave (mmWave) systems, antenna architecture limitations make it difficult to apply conventional fully digital precoding techniques but call for low-cost analog radio frequency (RF) and digital baseband hybrid precoding methods. This paper investigates joint RF-baseband hybrid precoding for the downlink of multiuser multiantenna mmWave systems with a limited number of RF chains. Two performance measures, maximizing the spectral efficiency and the energy efficiency of the system, are considered. We propose a codebook-based RF precoding design and obtain the channel state information via a beam sweep procedure. Via the codebook-based design, the original system is transformed into a virtual multiuser downlink system with the RF chain constraint. Consequently, we are able to simplify the complicated hybrid precoding optimization problems to joint codeword selection and precoder design (JWSPD) problems. Then, we propose efficient methods to address the JWSPD problems and jointly optimize the RF and baseband precoders under the two performance measures. Finally, extensive numerical results are provided to validate the effectiveness of the proposed hybrid precoders.
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