scholarly journals On Sum Rate and Power Consumption of Multi-User Distributed Antenna System with Circular Antenna Layout

2007 ◽  
Vol 2007 (1) ◽  
Author(s):  
Jiansong Gan ◽  
Yunzhou Li ◽  
Limin Xiao ◽  
Shidong Zhou ◽  
Jing Wang
Keyword(s):  
Power Consumption ◽  
Antenna System ◽  
Distributed Antenna System ◽  
Distributed Antenna ◽  
Sum Rate

scholarly journals A Semidynamic Bidirectional Clustering Algorithm for Downlink Cell-Free Massive Distributed Antenna System

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Panpan Qian ◽  
Huan Zhao ◽  
Yanmin Zhu ◽  
Qiang Sun
Keyword(s):  
Clustering Algorithm ◽  
Antenna System ◽  
Remote Access ◽  
Propagation Loss ◽  
Distributed Antenna System ◽  
Distributed Antenna ◽  
Mobile Stations ◽  
Significant Performance ◽  
Sum Rate

Cell-free massive distributed antenna system (CF-MDAS) can further reduce the access distance between mobile stations (MSs) and remote access points (RAPs), which brings a lower propagation loss and higher multiplexing gain. However, the interference caused by the overlapping coverage areas of distributed RAPs will severely degrade the system performance in terms of the sum-rate. Since that clustering RAPs can mitigate the interference, in this paper, we investigate a novel clustering algorithm for a downlink CF-MDAS with the limited-capacity backhaul. To reduce the backhaul burden and mitigate interference effectively, a semidynamic bidirectional clustering algorithm based on the long-term channel state information (CSI) is proposed, which has a low computational complexity. Simulation results show that the proposed algorithm can efficiently achieve a higher sum-rate than that of the static clustering one, which is close to the curve obtained by dynamic clustering algorithm using the short-term CSI. Furthermore, the proposed algorithm always reveals a significant performance gain regardless of the size of the networks.

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