| Summary: | 碩士 === 國立暨南國際大學 === 通訊工程研究所 === 94 === Over recent years, Ultra Wideband (UWB) wireless communication has received significant attention from academia and industry due to its benefits including higher data rate, low power consumption, low cost, and higher interference immunity. Although it has lots of advantages, it also brings some derivative issues, for example, the issues of synchronization, channel estimation and antenna design, etc. Here, we will focus on the synchronization issue for further discussions and researches.
In this thesis, we propose an effective synchronization algorithm which is suitable for UWB impulse radio systems under multipath environments. Conventionally, the synchronization algorithms for UWB system only support single user environment. However, our proposed algorithm can support multiuser environments. Based on the architecture of our proposed UWB receiver, the uncertain region is limited to one frame duration. Besides, owing to the parallel search mechanism, it can appreciably reduce the total search time for the synchronization process. However, our proposed UWB receiver needs higher circuit complexity.
Performances of our proposed algorithm and the symbol-differential synchronization algorithm are compared. Based on the performance analysis, we get the expected result that our proposed algorithm is better than the symbol-differential synchronization algorithm. On the circuit complexity, we are mainly to improve the frame-differential synchronization algorithm proposed by our senior schoolmate. Based on the performance analysis, the performance of our proposed algorithm is similar to that proposed by the senior schoolmate. How ever, the circuit complexity of our proposed algorithm is much lower than the senior schoolmate proposed algorithm.
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