DVB-SH

Both terrestrial and satellite layers use Orthogonal frequency-division multiplexing (OFDM) this modulation solves the multipath problem, where the same token can be received multiple times with a delay due to bounces.

Use OFDM in both transmitters enables creating single-frequency networks (SFN), that increases spectral efficiency but forces the terrestrial signal being identical to the transmitted by the satellite.

], results from BMCO forum [citation needed] (Alcatel April 2008) shows a radio improvement of at least 5.5 dB on signal requirements between DVB-H and DVB-SH in the UHF frequencies.

Initial specifications show that the chipsets supports both UHF and S-Band and are compatible with DVB-H. DiBcom has announced a DVB-SH chip with availability in 2008 Q3.

financing this effort through TVMSL, a project led by Alcatel-Lucent that plans to develop a DVB-SH standard suitable for hybrid satellite and terrestrial transmission.

Other partners involved in TVMSL are Sagem Wireless, Alenia, RFS, Philips, DiBcom, TeamCast, UDcast, CNRS, INRIA, CEA-LETI.

[3] ICO, one of the biggest satellite operators in the United States, in 2007 announced a nationwide deployment of an hybrid satellite/terrestrial network in DVB-SH with Alcatel-Lucent[4] and Expway.

[11] As of February 2008[update], DVB-H/SH trials were- or had recently been- underway in many cities and countries: Ireland,[12] United Kingdom,[13] Malaysia, Singapore,[14] Helsinki, Berlin, Cambridge, Pittsburgh, Paris, Tehran, Madrid, Sydney,[15] South Africa, Taiwan,[16] The Hague, Brussels, Bern, Vienna, New Zealand,[17] Philippines, Copenhagen, Budapest, Erlangen,[18] Sri Lanka, Roeselare, and India.