By Xiaodong Yang

“European has already constructed profitable criteria long ago, and i'm very con?dent that at the foundation of DVB-H, cellular television companies can developtheeconomiesofscaletheyneedfortake-upacrossEuropeandaround the world,” With those phrases of EU’s Telecom Commissioner Viviane Reding, DVB-H is destined to be a dominating cellular television know-how in Europe or even on the earth. i used to be ?rst getting into contact with the DVB expertise while i used to be doing my PhD study in Brunel college in united kingdom in 2002. at the moment DVB-T used to be already a mature and customary electronic broadcast know-how and a person may well simply purchase a DVB-T receiver out there to aim the electronic broadcast signs which were already broadcasted in united kingdom due to the fact 1998. Then the DVB know-how global replaced dramatically. As a extra ?exible and strong terr- trial broadcast approach focusing on handsets, DVB-H was once constructed according to DVB-T. In 2003 the DVB-H neighborhood have been always operating to ?n- ize the normal. eventually in November 2004 DVB-H used to be followed as an ETSI common EN 302 304. i used to be fortunate to determine most of these adjustments whilst i used to be doing my PhD study in DVB know-how. and that i was once very proud to be interested by the di?erent DVB-H study tasks because the starting of the DVB-H average improvement level. i used to be additionally fortunate adequate that i'm one of many ?rst people who ?nished PhD measure by means of concentrating on DVB-H learn.

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Extra resources for Handover in DVB-H: Investigation and Analysis

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The Scattered Pilots are training symbols that form a periodic pattern with specific period in time and in frequency. The Scattered Pilots are transmitted at a boosted power level to facilitate the synchronization of the OFDM frames. The correlation-based “Fast Scattered Pilot Synchronization” algorithm exploits the temporally repetitive structure of the scattered pilots and Schwoerer and Vesma [105] showed using mathematical analysis that the synchronization time (until channel estimation) could be cut by 84% by using the new technique.

Chapter 5 introduces the Electronic Service Guide (ESG) concepts used in DVB-H. As there are two categories of ESG at the time: DVB IPDC ESG and OMA BCAST ESG, these two different ESGs are presented in detail. Chapter 6 focuses on the different handover algorithms for dedicated DVBH networks in general. In the dedicated DVB-H networks, only the DVB-H receiver is considered, no matter whether the receiver has addition 3G or other uplink capability incorporated. Chapter 7 presents a handover algorithm based on post processing of SNR values for a dedicated DVB-H network.

In addition the DVB-H handheld receiver must have Global Positioning System (GPS) support which will be an additional cost to the customer. 5 Fast Scattered Pilot Synchronization Based Handover 39 still not fully convinced of the benefits of DVB-H services. Transferring the cost from the terminal side to the network side is an alternative solution if the network can provide the same location information to the terminal as a GPS receiver does. One alternative is to use the repeater aided handover algorithm described in the following section.

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