Fecha de publicación: -- Fuente: Wipo "digitalization" Embodiments of a digital up-conversion system for a concurrent multi- band signal and methods of operation thereof are disclosed. In one embodiment, a digital up-conversion system includes multiple digital up-converter chains, each for a different frequency band of the concurrent multi-band signal, and a digital combiner that combines up-converted signals output by the digital up-converter chains to provide a combined digital signal. The combined digital signal is processed by one or more additional processing components including a digital- to-analog converter (DAC) to provide the concurrent multi-band signal.