| Summary: | 碩士 === 國立臺灣大學 === 電信工程學研究所 === 93 === We investigate a DVB-H (Digital Video Broadcasting – Handheld) baseband receiver in the thesis. The architecture is based on the DVB-H standard which is published by ETSI (European Telecommunication Standard Institute). Mobility is an important requirement, meaning that access to services should be possible not only at almost all indoor and outdoor locations but also while moving in a vehicle at high speed. However, the situation is worsened by the fact that a multi-antenna diversity approach is almost impossible because of space limitations.
In this work, we propose a new algorithm which only uses a single antenna to compensate for the Doppler effect. When the carrier frequency of the transmitted signal is about 550 MHz, the tolerable maximal speed is about 110 Km/h. The method has much better performance than the conventional algorithm. In addition, we also propose some new algorithms to improve the performance of symbol timing synchronization, carrier frequency offset estimation and channel estimation. Finally, we make simulation in Simulink environment to demonstrate that the receiver we design indeed works well.
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