High-performance wideband wireless TDMA via carrier interferometry pulse shaping

This paper explains how a novel pulse shape (referred to as the carrier interferometry (CI) pulse shape) can enable TDMA to operate over non-adjacent frequency bands (in a manner identical to its operation if all these bands were made contiguous): In this way, moderate-to-high-power wideband TDMA may be supported without interference to existing licensed bands. The proposed CI pulse shape supporting wideband TDMA corresponds to an interferometry pattern created by the superposition of N carriers (adjacent or nonadjacent in the frequency domain). This novel CI pulse shaping enables TDMA receivers to break the pulse into its frequency components and optimally recombine components to exploit frequency diversity. With the exception of a pulse shape operating over non-contiguous bands and a frequency-domain receiver design, this new system retains all the features of current TDMA systems.