5G modulation technique

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engineer_eda

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Hi,

Can anyone please explain which modulation technique is used in 5G? And what is the difference between 4G and 5G in terms of the modulation techniques implemented?

Thanks.
 

That depends, what do you consider 5G? Be wary of marketing. There is no standard for 5G yet. Most people have not even experienced 4G. LTE does not meet ITU 4G requirements.

3G - WiMax, HSPA, EV-DO
3.5G - HSPA+, Wimax revision, LTE
4G - LTE Advanced

I'm assuming Samsung's recent press release spurred this topic. Samsung has demonstrated communication at millimeter wave frequencies that meet projected definitions of 5G, but that doesn't mean it is ready for your cell phone. There are many engineering hurdles that remain not to mention that the standardization process hasn't even announced that they will use millimeter wave frequencies (although I don't know where else they will get the bandwidth).
 
I think the modulation technique may be various, but nothing conceptually new - guess OFDM, QPSK, nQAM and that is all.
I think physical layer now reaches its limit and the further quality of service improvement can be based only on upper OSI levels optimization.
 

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