期刊
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
卷 15, 期 5, 页码 3380-3392出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TWC.2016.2520930
关键词
Millimeter wave communication; mmWave; beamforming; codebook design; hierarchial search
资金
- National Natural Science Foundation of China (NSFC) [61571025, 91338106, 91538204, 61231013]
- National Basic Research Program of China [2011CB707000]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [61221061]
In millimeter-wave communication, large antenna arrays are required to achieve high power gain by steering toward each other with narrow beams, which poses the problem to efficiently search the best beam direction in the angle domain at both Tx and Rx sides. As the exhaustive search is time consuming, hierarchical search has been widely accepted to reduce the complexity, and its performance is highly dependent on the codebook design. In this paper, we propose two basic criteria for the hierarchical codebook design, and devise an efficient hierarchical codebook by jointly exploiting sub-array and deactivation (turning-off) antenna processing techniques, where closed-form expressions are provided to generate the codebook. Performance evaluations are conducted under different system and channel models. Results show superiority of the proposed codebook over the existing alternatives.
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