| Author Name | Affiliation | | Xin Gui | Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China | | Gui-Xia Kang | Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China | | Xi-Dong Zhang | Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China | | Ping Zhang | Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: |
| This paper focuses on analyzing the ergodic capacity performance of limited feedback (LFB) beamforming in multi-user distributed antenna system (DAS). In such a system, multi-user interference (MUI) is inevitably due to the channel uncertainties caused by quantization error. Considering this, we propose a parameter named effective ergodic capacity rate (EECR), which denotes the capacity offset between finite rate feedback and perfect channel state information (CSI). The simulation results show that the derived approximated EECR is very tight to actual EECR. Based on the approximated EECR, an adaptive minimum bit feedback scheme is proposed, which can effectively reduce the overhead of feedback channel and the complexity of the system. The simulation results verify the effectiveness of the proposed scheme. |
| Key words: limited feedback distributed antenna system effective ergodic capacity rate (EECR) adaptive minimum bit feedback scheme |
| DOI：10.11916/j.issn.1005-9113.2013.01.006 |
| Clc Number:TN92 |
| Fund: |
