1/23/2018 5G Waveforms | GFDM FBMC UFMC F-OFDM | Radio-Electronics.Com 1/2 5G technology 5G timescales Requirements 5G waveforms Modulation schemes Multiple access schemes Millimetre wave links Full duplex 5G Waveforms - with the higher level of processing that will be available, new 5G waveforms are being considered and evaluated for use with the new system. 5G TECHNOLOGY TUTORIAL INCLUDES Although OFDM has been a great success and still has many advantages, there are many ideas for new 5G waveforms that could bring additional advantages to the new cellular system under certain conditions and circumstances. No single waveform provides all the advantages and answers that are needed. As a result many anticipate that the final outcome for 5G waveforms may include an adaptive solution - using the optimum waveform for any given situation. Now that 5G is being investigated, there is an excellent opportunity to consider the optimum waveforms for the 5G system that will be used until at least 2040. 5G waveform background Orthogonal frequency division multiplexing has been an excellent waveform choice for 4G. It provides excellent spectrum efficiency, it can be processed and handled with the processing levels achievable in current mobile handsets, and it operates well with high data rate stream occupying wide bandwidths. It operates well in situations where there is selective fading. However with the advances in processing capabilities that will be available by 2020 when 5G is expected to have its first launches means that other waveforms can be considered. There are several advantages to the use of new waveforms for 5G. OFDM requires the use of a cyclic prefix and this occupies space within the data streams. There are also other advantages that can be introduced by using one of a variety of new waveforms for 5G. One of the key requirements is the availability of processing power. Although Moore's Law in its basic form is running to the limits of device feature sizes and further advances in miniaturisation are unlikely for a while, other techniques are being developed that mean the spirit of Moore's Law is able to continue and processing capability will increase. As such new 5G waveforms that require additional processing power, but are able to provide additional advantages are still viable. 5G waveform requirements The potential applications for 5G including high speed video downloads, gaming, car-to-car / car-to-infrastructure communications, general cellular communications, IoT / M2M communications and the like, all place requirements on the form of 5G waveform scheme that can provide the required performance.
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