ARLA/CLUSTER: O Impacto dos sistemas telefonicos 4G na Televisão

[João Gonçalves Costa]

Impact of 4G phones on TV

The BBC Radio 4 Today show reports on the possible impact of 4G mobile phones on poorly designed TV systems.

The use by some households of poor quality broadband TV boosters that lack adequate filtering means that hundreds of thousands of households risk losing their TV picture when 4G phones start using the 800 MHz frequencies in Spring 2013.

The 4G item appears at 00:44:10 into this BBC iPlayer recording
http://www.bbc.co.uk/iplayer/b006qj9z/console

A Parliamentary debate on 800 MHz 4G and the problems that badly designed TV systems could face was initiated by Essex MP John Whittingdale (Maldon) and a transcript can be read at
http://www.theyworkforyou.com/whall/?id=2012-10-30a.61.0&m=40134

Digital Mobile Spectrum Limited, originally called MitCo, will be responsible for ensuring that consumers continue to receive clear Freeview TV signals following the launch of 4G mobile services in the 800 MHz spectrum band next Spring.

DMSL will be supplying filters to reduce interference problems although it is still unclear whether these will be high-quality Bandpass filters which will also attenuate signals below 475 MHz or cheaper Low-pass filters that just filter out signals above 790 MHz.

Assessment of LTE 800 MHz Base Station Interference into DTT Receivers
http://stakeholders.ofcom.org.uk/binaries/consultations/dtt/annexes/Ite-800-mhz.pdf
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