| Summary: | 碩士 === 國立交通大學 === 電子工程系 === 88 === In DS/CDMA communication systems, the capability of spreading code acquisition can decide the number of users affordable in a system. Moreover, in third-generation wireless communication system, bursty (non-continuous) transmissions in uplink network make the maintenance of synchronization more difficult. Thus, a fast acquisition algorithm with high detection probability is required.
In this thesis, the effects of several post-detection integration (PDI) schemes in acquisition algorithm are discussed. Performances of each scheme under different channel environments are compared. A more robust scheme in both static and time-varying channel is proposed. We introduce a channel estimation algorithm based on linear regression to analyze PDI scheme. With more elegant channel estimation, the new scheme can adapt better to different channel environments.
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