Path loss reduction for multiusers by different antenna arrays

Author

Shu-Han Liao ; Youn-Tai Lee ; Chien-Ching Chiu ; Chien-Hui Chung

Author_Institution

Adv. Commun. Syst. Center, Smart Network Syst. Inst., Taipei, Taiwan

fYear

2014

Firstpage

35

Lastpage

39

Abstract

In this paper, we use the shooting and bouncing ray/image (SBRlImage) method to compute the path loss for different outdoor environments. Three types of antenna arrays such as L shape, Y shape, and Circular shape arrays are used in the base station and their corresponding path loss on several routes in the outdoor environment are calculated. Moreover, the genetic algorithm (GA) and Dynamic Differential Evolution (DDE) are employed to optimize the excitation voltages and phases for antenna arrays to form proper antenna patterns. The particle swarm optimization algorithm has better optimization result than genetic algorithm in NLOS case. For antenna arrays Y shape has better optimization result in NLOS case.

Keywords

antenna arrays; genetic algorithms; multi-access systems; particle swarm optimisation; radiocommunication; radiowave propagation; L-shaped arrays; Y-shaped arrays; antenna arrays; antenna patterns; circular shape arrays; dynamic differential evolution; excitation voltage optimization; genetic algorithm; multiuser path loss reduction; nonline-of-sight communication; outdoor environment; particle swarm optimization algorithm; phase optimization; shooting and bouncing ray-image method; Antenna arrays; Equations; Genetic algorithms; Optimization; Reflection; Shape; SBR/Image method; antenna arrays; multiusers; outdoor; path loss;

fLanguage

English

Publisher

ieee

Conference_Titel

Science, Computing and Telecommunications (PACT), 2014 Pan African Conference on

Type

conf

DOI

10.1109/SCAT.2014.7055132

Filename

7055132