5G millimeter wave features:
Millimeter waves have short wavelengths that range from 10 millimeters to 1 millimeter.
To achieve higher data rate requirement in the order of 10 Gbps, 5G technology has been developed.
The specifications are published in the 3GPP Release 15 and beyond.
5G has different frequency ranges sub 6 GHz (5G macro optimized), 3-30 GHz (5G E small cells) and 30-100 GHz (5G Ultra Dense).
The frequency bands which lies between 30 GHz to 300 GHz is known as millimeter wave.
This is due to the fact that wavelength of electro-magnetic wave will be in millimeter range at these frequencies.
There are many advantages and disadvantages of mm wave.
Due to growth of large number of mobile data subscribers, need for larger bandwidth arises.
The fact is bandwidth is limited in the available mobile frequency spectrum which is below the mm wave band.
Due to this millimeter wave band has been explored as mobile frequency spectrum by operators due to its support for larger bandwidth.
Though penetration loss is higher at these mm wave frequencies as these frequencies can not penetrate walls and certain objects in the buildings.
Moreover mm wave frequencies get attenuated due to rain. After careful inclusion of all these factors in the RF link budget calculation, mm wave can be strong future for the mobile data broadband market.
Data rate => min 10 gbps
Modulation types => CP-OFDMA <40GHz < SC
modulation frequency => Upto 100GHZ
Bandwidths => 500 MHZ to 2 GHZ
Distance coverage => upto 250 meters
Frame => TDD
MIMO => Massive MIMO
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