2-D Antenna Array Using an Asynchronous Direct-Sequence Code Division Mutiple Access System

• Main Authors: Lee Kuan, 李坤翰
• Other Authors: Yung-Dar Huang
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/73557542664550034859

碩士 === 國立臺灣科技大學 === 電子工程技術研究所 === 86 === In this thesis, we propose two-dimensional antenna array receiver utilizing recursive least square algorithm to pre-processing the receiversignal in an asynchronous direct sequence code division multiple access system. This algorithm is a real time decode. It uses all receiving chipsin one data bit to decide next chip in order to attain a better performanceof estimation. Because the reflection and refraction of channel make the receiving endnot ideal, this thesis proposes an amplitude estimation of matched filter to estimate the amplitude of receiving signals. We also use the minimum meansquare error criterion to estimate each period of the propagation paths. In the computer simulation, the performance especially in terms of multi-path interference of proposed system compared to that of the system suggested by Lin and Zoltowaki is studied. A satisfactory performance of bit error rate is obtained.