What is LTE ? How does LTE interfere with DTT ? How to filter out LTE interference ? Soontai LTE filter Contents
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 : LTEbase stations and handheld devices use different bands • TDD : LTE base stations and handheld devices use the same bands
Digital TV Frequency LTE Downlink Band LTE Uplink Band FDD LTE 800MHz Spectrum
How does LTE interfere with DTT ? LTE-800 Transmission Interferance into DTT LTE Base Station
LTE 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?
LTE Interferes with DTT LTE signal DVB-T signal TV Antenna LTE Base Station DVB-T signal LTE signal LTE Filter DVB-T set-top box DVB-T signal LTE signal LTE User Equipememt
Teletronik LTE Filter LTE 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, teletronik can offer the LTE filter in a variety of packages and frequencies for various markets. Your inquiries are welcome.