The 3.5 GHz band has been in the spotlight because of the USA’s very specific plan for the spectrum, but elsewhere in the world, frequencies from 3.4 GHz to 3.6 GHz have been allocated for years for fixed broadband wireless, and are increasingly being adapted for TD-LTE as regulators have allowed mobile hand-off too. The band is now expanding down to 3.3 GHz, following World Radio Conference last November, and China Mobile and Huawei have completed the first live demonstration of an end-to-end TD-LTE system in 3.3 GHz to 3.4 GHz spectrum. As operators turn their attention from coverage-oriented initial LTE roll-outs, to expanding capacity, they are more interested in higher frequencies, which support large capacity. In this context, TDD…