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A Maximum Likelihood Method of Code Tracking Loop Using Matched Filter in Multi-path Channel  

Son, Seung-Ho (한국전자통신연구원 위성무선융합연구부 위성항법연구팀)
Lee, Sang-Uk (한국전자통신연구원 위성무선융합연구부 위성항법연구팀)
Publication Information
Journal of Satellite, Information and Communications / v.5, no.1, 2010 , pp. 54-57 More about this Journal
Abstract
The navigation system like GPS which is core technology is based on Code Division Multiple Access(CDMA) techniques. To receive satellite signal smoothly in CDMA, received signals have to synchronize with spread code. In this paper, we focus on the code tracking methods among synchronization techniques. The conventional delay lock loop(DLL) is unsuitable for multi-path channel. We will introduce how it overcomes distortion by multi-path. We will propose method that separates out multi-path signals and tracks the each path signals. And we will confirm performance of proposed method using Spirent simulator.
Keywords
GPS; CDMA; Code tracking loop; Maximum Likelihood; DLL;
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  • Reference
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