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Soontai Soontai LTE FilterLTE Filter
2011.03.30 v1.02011.03.30 v1.0
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What is LTE ?What is LTE ?
How does LTE interfere with DTT ?How does LTE interfere with DTT ?
How to filter out LTE interference ?How to filter out LTE interference ?
Soontai LTE filterSoontai LTE filter
ContentsContents
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What is LTE ?What is LTE ? LTE (Long Term Evolution) is a 4th generation (4G) standard for mobile communication.
Currently 17 communication companies worldwide have adopted LTE, more than 100 more are about to follow.
LTE uses
- FDD (Frequency Division Duplexing) and
- TDD (Time Division Duplexing) protocols
FDD : LTE base stations and handheld devices use different bands
TDD : LTE base stations and handheld devices use the same bands
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USA
MetroPCS :
- 2010.09.21 - FDD 1.4/1.7GHz
Verizon :
- 2010.12.05 - FDD 700MHz
Germany
Vodafone : - 2010.12.01 - FDD 800MHz
Japan
NTT DoCoMo : - 2010.12.24 - FDD 1.5GHz
Uzbekistan
MTS / UCell: - 2010.07.28 - 2010.08.09 - TDD 2.6GHz
Norway
TeliaSonera: - 2009.12.15 - TDD 2.6GHz
Finland
TeliaSonera: - 2010.11.30 - TDD 2.6GHz
Denmark
TeliaSonera: - 2010.12.09 - TDD 2.6GHz
Estonia
EMT: - 2010.12.17 - TDD 2.6GHz
Sweden
TeliaSonera: - 2009.12.15 - TDD 2.6GHz
Poland
Mobyland, CenterNet - 2010.09.07 - TDD 2.6GHz
Austria
A1 Telekom - 2010.11.05 - TDD 2.6GHz
Canada700MHz/2.6GHz 2010 auction
Brazil2.6GHz 2013 auction
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FDD LTE 800MHz SpectrumFDD LTE 800MHz Spectrum
Digital TV Frequency LTE Downlink Band LTE Uplink Band
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LTE-800 TransmissionLTE-800 Transmission Interferance into DTT Interferance into DTT
LTE Base Station
How does LTE interfere with DTT ?How does LTE interfere with DTT ?
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LTE User Equipment
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LTE Interference to DTTLTE Interference to DTT
When LTE uses the 800 MHz “digital dividend” (Europe 790-864MHz) or the 700 MHz “white space” band (USA 698-806MHz) there will be interference with digital video broadcast signals (DVB-T/ATSC).
DTV picture noise: How to solve this problem?
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DVB-Tsignal
LTEsignal
LTE Interferes with DTTLTE Interferes with DTT
DVB-T set-top box
TV
Antenna
LTE signal
LTE Base Station
LTEUser Equipememt
DVB-T signal
Soontai LTE Filter
Soontai LTE FilterSoontai LTE Filter
DVB-Tsignal
LTEsignal
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Soontai LTE FilterSoontai LTE FilterLTE is the 4th generation mobile communication standard. This standard uses the frequency band next to the DVB-T band (790 - 862MHz in Europe, 698 - 806MHz in the Americas), which will lead to interferences with DVB TV or set-top-boxes. According to tests from Ofcom this interference can be eliminated with the help of a high rejection low pass filter.
Our LTE Filters pass all requirements to eliminate interferences by LTE signals on digital broadcast reception. As a professional filter designer, Soontai can offer the LTE filter in a variety of packages and frequencies for various markets. Your inquiries are welcome. For more information please contact Mr. Kevin Chang E-mail : [email protected]
www.soontai.com
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