Though most advances in usable mobile bandwidth come about through network architecture or access to additional bandwidth, better antenna technology and air interfaces (including modulation methods) also play a role.
Cohere Technologies, for example, touts its Orthogonal Time Frequency and Space (OTFS) technology, which supports “fadeless” radio performance at distances beyond four kilometers.
In tests, Cohere radios were able to maintain a minimum of four bits per second per Hertz in 10 MHz of bandwidth, achieving at least 120 Mbps up to 320 Mbps throughput.
Cohere argues that OTFS supports 100 percent coverage, 10 times the spectral efficiency and a 50 percent cost savings over existing solutions.
Some, including executives at Nokia, believe an order of magnitude improvement can be wrung--between 2010 and 2020--from new spectrum allocation, transmission efficiency and smaller cell architectures.
Between 2012 and 2017, for example, Nokia believes a 14 percent capacity gain can be wrung from air interfaces, more than the 12 percent gain Nokia expects from new spectrum allocation.
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