教師資料查詢 | 類別: 期刊論文 | 教師: 丘建青 Chiu Chien-ching (瀏覽個人網頁)

標題:Novel Directional Radiation Pattern by Genetic Algorithms in Indoor Wireless Local Loop
學年96
學期1
出版(發表)日期2007/09/01
作品名稱Novel Directional Radiation Pattern by Genetic Algorithms in Indoor Wireless Local Loop
作品名稱(其他語言)
著者Chen, Chien-hung; 丘建青; Chiu, Chien-ching; Liu, Chun-liang
單位淡江大學電機工程學系
出版者Springer
著錄名稱、卷期、頁數Wireless Personal Communications 42(4), pp.575-586
摘要The genetic algorithm is used to synthesize the radiation pattern of the directional circular arc array to minimize the bit error rate (BER) performance in indoor wireless communication system. The impulse responses of the indoor channel for any transmitter-receiver location are computed by shooting and bouncing ray/image techniques. By using the impulse response of multipath channel, the performance of the synthesized antenna pattern on BPSK (binary phase shift keying) system with phase and timing recovery circuits can be calculated. Based on the topography of the antenna and the BER formula, the synthesis problem can be reformulated into an optimization problem and solved by the genetic algorithm. The novelty of our approach is choosing BER as the object function instead of sidelobe level of the antenna pattern, i.e., BER performance is defined as a object function to optimize the excitation coefficient of array by the genetic algorithm. The strong point of the genetic algorithm is that it can find out the solution even if the performance index cannot be formulated by simple equations. Besides, the genetic algorithm will converge to global extreme instead of local extreme and achieves a good antenna pattern. Numerical results show that the synthesized antenna pattern is effective to combat the multipath fading and can increase the transmission rate of indoor millimeter wave system.
關鍵字genetic algorithm; radiation pattern; minimize; BER
語言英文
ISSN0929-6212
期刊性質國外
收錄於SCI;EI
產學合作
通訊作者
審稿制度
國別
公開徵稿
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