Abstract
In this paper, we consider spatial beamforming for massive multiple-input multiple-output (MIMO) systems in frequency division duplexing (FDD). In order to reduce channel state information (CSI) feedback overhead of users, near-by users that have similar statistical channel correlation are put into a group and channel correlation matrix based precoding scheme is proposed. More specifically, we propose to employ two-stage precoder at a base station (BS): Outer precoder and inner precoder. The former is designed to minimize inter-group interference by considering the statistical channel correlation. The latter is designed to minimize intra-group interference by utilizing modified statistical channel correlation and instantaneous channel state information (ICSI). The inner precoder is composed of three steps: precoded pilot signal transmission phase at the BS, effective channel gain calculation and feedback stage at the mobile user, and data transmission stage at the BS.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
