4G LTE decreases the LPRF 868Mhz range with 2/3.

Fredrik Johansson

Other Parts Discussed in Thread: CC1190, CC1101, CC1120, CC1000

In Europe 4G networks based on LTE started to be implemented and they are using the 800MHz bands. Sweden and Germany already have installations and other countries are on their way to auction the bands.

Most LPRF applications in the EU is using the 868MHz band and external tests shows that the range is decreased with 2/3 or more. What are Texas recommendatios to the LPRF market, filters?, SW? Are there new Evaluation boards being developed that addresses the issue with coexistence with 4G?

When the 4G phones becomes the new standard phones many applications will suffer.

over 12 years ago

0 Timothy Barr over 12 years ago

Genius 3370 points

I did some reading on the web about this issue. Does not look like there is much that can be done from a technical standpoint except to boost the link budget by using a PA/LNA part like the CC1190. Otherwise, the TI parts will work in the 870-876/915-921 MHz bands, which seem to be the new frequency ranges being considered by ETSI for future SRD usage. Hopefully they will follow through on that.

0 TER over 12 years ago in reply to Timothy Barr

TI__Guru**** 317180 points

To my knowledge these tests were done with CC1000. CC1101 and CC1120 will be less affected.

0 Fredrik Johansson over 12 years ago in reply to TER

Prodigy 125 points

Agreed the CC1120 will be part of the answer to this issue and I would like to get this quantified in relationship to 4G LTE. Recommendations or an application note from Texas Instruments would be very valuable before it becomes a major issue in a years time or so.

0 Mizanur Chowdhury over 12 years ago in reply to Fredrik Johansson

TI__Genius 17270 points

Hello Fredrik,

Thanks for your inputs, we have notified the BU about this. I think a document or apps note describing the co-existence with LTE is something we need soon.

BR,

0 Edward Gawthorpe over 12 years ago in reply to Mizanur Chowdhury

Prodigy 10 points

Hi,

There is information on LTE interference to 868MHz based products at:

www.rfdesignuk.com/LTEoverview.htm

Regards, Edward.

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4G LTE decreases the LPRF 868Mhz range with 2/3.