When most people think of 5G, they think of it as a unique technology unlike any previous generation of wireless networking.
And while that is mostly true, even 5G is made up of underlying technologies.
In truth, 5G is based on OFDM (Orthogonal frequency-division multiplexing), a method of modulating a digital signal across several different channels to reduce interference.
5G uses 5G NR air interface alongside OFDM principles. 5G also uses wider bandwidth technologies such as sub-6 GHz and mmWave.
Like 4G LTE, 5G OFDM operates based on the same mobile networking principles. However, the new 5G NR air interface further enhances OFDM to deliver a much higher degree of flexibility and scalability.
This process overall provides more 5G access to more people and things for a variety of different use cases.
Additionally 5G has brought wider bandwidths by expanding the usage of spectrum resources, from sub-3 GHz used in 4G to 100 GHz and beyond. 5G can operate in both lower bands (e.g., sub-6 GHz) as well as mmWave (e.g., 24 GHz and up), which will bring extreme capacity, multi-Gbps throughput and low latency.
5G is designed to not only deliver faster, better mobile broadband services compared to 4G LTE, but can also expand into new service areas such as mission-critical communications and connecting the massive IoT.
This is enabled by many new 5G NR air interface design techniques, such as a new self-contained TDD subframe design.
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