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:Bit Error Rate Reduction by Smart UWB Antenna Array in Indoor Wireless Communication
學年
學期
出版(發表)日期2012/06/01
作品名稱Bit Error Rate Reduction by Smart UWB Antenna Array in Indoor Wireless Communication
作品名稱(其他語言)
著者Chiu, Chien-Ching; Chen, Chien-Hung; Liao, Shu-Han; Chen, Kuan-Chung
單位淡江大學電機工程學系
出版者Tamkang University
著錄名稱、卷期、頁數Journal of Applied Science and Engineering 15(2), pp.139-148
摘要In this paper, a new ultra wideband circular antenna array (UCAA) combining genetic algorithm to minimize the bit error rate (BER) is proposed. The ultra wideband (UWB) impulse responses of the indoor channel for any transmitter-receiver location are computed by applying shooting and bouncing ray/image (SBR/Image) techniques, inverse fast Fourier transform and Hermitian processing. By using the impulse response of multipath channel, the BER performance of the binary pulse amplitude modulation (B-PAM) impulse radio (IR) UWB system with circular antenna array can be calculated. Based on the topography of the antenna and the BER formula, the array pattern synthesis problem can be reformulated into an optimization problem and solved by the genetic algorithm. Our approach is not only choosing BER as the object function instead of sidelobe level of the antenna pattern, but also considering the antenna feed length effect of each array element. 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. Simulation results show that the synthesized antenna array pattern is effective to focus maximum gain to the LOS path which scales as the number of array elements. In other words, the receiver can increase the received signal energy to noise ratio. The synthesized array pattern also can mitigate severe multipath fading in complex propagation environment. As a result, the BER can be reduced substantially in indoor UWB communication system.
關鍵字UWB;Genetic Algorithm;BER;Feed Length;Circular Antenna Array;SBR/Image
語言英文(美國)
ISSN1560-6686
期刊性質國內
收錄於EI;
產學合作
通訊作者丘建青 chiu@ee.edu.tku.tw
審稿制度
國別中華民國
公開徵稿
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