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Ergodic Capacity Analysis and Adaptive Transsmion Scheme in Multi-user Distributed Antenna Systems

本站小编 哈尔滨工业大学/2019-10-24

Ergodic Capacity Analysis and Adaptive Transsmion Scheme in Multi-user Distributed Antenna Systems

Xin Gui, Gui-Xia Kang, Xi-Dong Zhang, Ping Zhang

Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China



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:


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