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On Optimal Antenna Tilting Angles for Cooperative Transmissions Between Sectors in Cellular Systems  

Ko, Jin-Seok (Department of Electronic Engineering, Sogang University)
Kim, Jae-Won (Department of Electronic Engineering, Sogang University)
Park, Jong-Hyun (Department of Electronic Engineering, Sogang University)
Sung, Won-Jin (Department of Electronic Engineering, Sogang University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.47, no.7, 2010 , pp. 29-35 More about this Journal
Abstract
The cooperative transmission between sectors in next generation communications standards, e.g., 3GPP LTE-Advanced and IEEE 802.16m, has become an important research issue. Hence methods to decide the optimal antenna tilting angle in cooperative transmission between sectors are needed. This paper proposes methods to decide the optimal antenna tilting angle in cases of non-cooperative and cooperative transmissions between sectors. The proposed methods use an objective function that maximizes the cell average log rate or the cell average rate for users distributed uniformly within the radius of the sector. Also, the objective function which maximizes the cell average rate determined by adaptive modulation and coding (AMC) used in actual cellular systems is considered. When the cell average rate becomes the objective function, the system rate efficiency increases significantly for both cooperative and non-cooperative transmission. When the cell average log rate and the AMC rate become the objective functions, an optimal antenna tilting decision method which effectively increases the efficiency of cell boundary users is discussed.
Keywords
AMC;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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