DOI: 10.5176/978-981-08-9266-1_mobicona25
Authors: Chien-Hung Chen, Chien-Hui Chung, Chien-Ching Chiu, Shu-Han Liao
Abstract:
In this paper, we use the SBR/Image method to compute the path loss for outdoor environment in the area of Taipei. Two types of antenna arrays such as L shape and Circular shape arrays are used in the base station and their corresponding path loss on several routes for Multiusers in the outdoor environment are calculated[1]-[3]. Moreover, Genetic Algorithm (GA) is employed to optimize the excitation voltages and phases for antenna arrays to form proper antenna patterns [4]. The performance in reduction of path loss by the optimization algorithm is investigated for these antenna arrays for multiusers. By the obtained antenna patterns, we can know the route with the lowest path loss; meanwhile, transmission power using this route in the base station can be reduced. For antenna arrays L shape has better optimization result than Circular shape. The investigated results can help communication engineers improve their planning and design of outdoor communication system.
Keywords: SBR/Image method; outdoor; antenna arrays; path loss; multiusers
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