Title :
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
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;
Conference_Titel :
Science, Computing and Telecommunications (PACT), 2014 Pan African Conference on
DOI :
10.1109/SCAT.2014.7055132
