Refarming UHF Spectrum: Wireless Opportunities & Challenges for 4G
With more countries starting the auction process, the U.K. announced its intention in April, to sell off recently vacated prime 800MHz spectrum, seen by many as vital for rural wireless broadband expansion. This is happening as a consequence of the switchover from analog to digital broadcasting technology. In many countries this has already happened and globally is expected to be completed before the end of the decade. With the change in technology, broadcasters have the ability to transmit a greater number of channels, thus satisfying public demand, while using less spectrum. It is this development that is making spectrum available and is referred to in some regions as the “Digital Dividend.”
UHF spectrum, 700MHz to 900MHz, is attractive to many users because it covers what is known as the “sweet spot” for radio transmission. This sweet spot is where the ideal balance between range, bandwidth and cost resides. It is for this reason that this particular spectrum is so attractive to many users. The main competing demands for this spectrum are from broadcasters wishing to deliver HDTV using the DVB-T2 protocol (or similar) and cellular network operators looking to deploy LTE. There are however other interesting proposals such as white space usage.
Importantly, it is not just the competing interests for this spectrum that need to be considered, but also the effect of these new services on the many millions of pieces of existing equipment that are out there in the market place that users will expect to be able to be used for some years to come. These factors are explored in greater detail in a recent white paper from Aviat Networks that covers both the technical and organizational issues raised by this process and how they have been tackled in a number of major markets around the globe
Regulatory Manager, Aviat Networks