A novel zero-payload downlink CSI feedback scheme for closed-loop beamforming system |
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| Authors: | Zhang Yiheng Cui Qimei Tao Xiaofeng Zhang Ping |
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| Institution: | Key Laboratory of Universal Wireless Communications,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,P.R.China |
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| Abstract: | A novel downlink channel state information(CSI)feedback scheme is proposed for the closed-loop beamforming system.In the proposed scheme,mobile terminal(MT)superposes the uplink pilot on the received downlink pilot,forms the hybrid pilot(HP),and then transmits the HP to base station(BS)via the uplink pilot channel.Because downlink CSI can be recovered from HP at BS side without consuming extra uplink bandwidth,the proposed scheme can achieve zero-payload CSI feedback,effectively solving the traditional bott... |
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| Keywords: | CSI feedback hybrid pilot beamforming |
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