Multistation data fusion for code-division multiple access wireless communications

作     者：Tian, Z Chang, KC 

作者机构：Michigan Technol Univ Dept Elect & Comp Engn Houghton MI 49931 USA George Mason Univ Syst Engn & Operat Res Dept Fairfax VA 22030 USA 

出 版 物：《OPTICAL ENGINEERING》 (光学工程)

年 卷 期：2003年第42卷第6期

页      面：1572-1582页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 0702[理学-物理学] 

主　　题：data fusion code-division multiple access wireless networks handoff strategies performance analysis 

摘      要：Data fusion is the study of optimal information processing in distributed multisensor environments with the benefits of more reliable detection and higher immunity to noise and sensor failures. We investigate applications of the data fusion principle to the handoff problem in popular code-division multiple access (CDMA) cellular wireless communication networks. When a mobile station traverses a cell boundary, cell handoff is required to make the transition of a mobile between cells smoother without degrading performance. CDMA multiple access allows soft handoff, in which the signal strength of the mobile is detected and tracked by the searchers from more than one base station. The cell receiving the strongest signal strength handles signal processing. We demonstrate that the signal detection quality in the handoff region can be further improved by fusing the detected results from multiple base stations. A new fusion handoff strategy is designed, and its error performance measures are derived analytically in the presence of log-normal shadowing. Theoretical fading margin analysis shows that the fusion handoff approach offers better network performance over conventional hard and soft handoffs. (C) 2003 Society of Photo-Optical Instrumentation Engineers.