CSI feedback with feedforward signaling and adaptive codebook for cellular FDD systems

	CSI feedback with feedforward signaling and adaptive codebook for cellular FDD systems
	Zhang, Xiaoyu1 ; Luo, Xiliang1 ; Tomasin, Stefano 2; Benvenuto, Nevio 2; Yang, Shaoshi 3
	2018
会议录名称	24TH EUROPEAN WIRELESS CONFERENCE 2018: WIRELESS FUTURES IN THE ERA OF NETWORK PROGRAMMABILITY, EW 2018
页码	215-220
发表状态	已发表
摘要	Multi-antenna base stations (BSs) in cellular systems require channel state information (CSI) of the downlink channel for proper transmit beamforming. In frequency division duplexing (FDD) systems the downlink channel is usually estimated at the user equipment (UE) and then fed back to the BS with a limited number of bits. We instead exploit the partial correlation of the uplink and downlink channels and propose a new CSI reporting procedure that reduces the signaling overhead by splitting it between uplink and downlink. In our procedure the codebook used for the quantization of the downlink channel at the UE is adapted to the uplink channel estimated at the BS: therefore the BS estimates and quantize the uplink channel, then sends to the UE the quantization index, which is used in turn to select the quantization codebook for the downlink channel. The BS reconstructs the downlink channel by either using only the feedback from the UE or merging it with its own knowledge of the "unquantized" uplink channel. Numerical results obtained on the COST 2100 model confirm the correlation among uplink and downlink channels and support the validity of the proposed techniques in balancing the uplink and downlink signaling overhead. © 2018 VDE VERLAG GMBH.
会议地点	Catania, Italy
收录类别	EI
出版者	VDE VERLAG GMBH
EI入藏号	20182905577051
EI主题词	Antennas ; Communication channels (information theory) ; Feedback ; Frequency division multiplexing
EI分类号	Information Theory and Signal Processing:716.1 ; Control Systems:731.1
原始文献类型	Conference article (CA)
文献类型	会议论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/29700
专题	信息科学与技术学院_PI研究组_罗喜良组信息科学与技术学院_博士生
作者单位	1.School of Information Science and Technology, ShanghaiTech University, Shanghai, China 2.Department of Information Engineering, University of Padova, Padova, Italy 3.Huawei Technologies, Shanghai, China
第一作者单位	信息科学与技术学院
第一作者的第一单位	信息科学与技术学院
推荐引用方式 GB/T 7714	Zhang, Xiaoyu,Luo, Xiliang,Tomasin, Stefano,et al. CSI feedback with feedforward signaling and adaptive codebook for cellular FDD systems[C]:VDE VERLAG GMBH,2018:215-220.