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In this paper it will be shown that propagating specific state registers in a fully parallel Delta-Sigma Architecture can have a profound impact in enhancing the performance of these type of modulators without stringent requirements in terms of latency and resources usage. An FPGA-based transmitter was implemented and designed to validate the proposed architecture, and to demonstrate that flexible,...
In this paper it will be shown that cascading Delta-Sigma Modulators with different sampling rates can have a considerable impact in relaxing the high quality factor of the analog output filter used in All-Digital Transmitters. In particular, a significant reduction of the noise peak power can be achieved with just minor changes in the hardware. This novel concept has been successfully implemented...
In this paper, we present a novel architecture for an All-Digital FPGA-based Antenna Array RF Transmitter. The proposed method reduces the complexity inherent to the design of antenna arrays by removing external Digital-to-Analog Converters and external analog upconversion stages. With such a concept, the analog front-end complexity is highly reduced and, consequently, more radiating elements can...
Fully digital transmitters have been thoroughly explored over the last few years to develop a novel type of agile, reconfigurable, multi-band, multi-standard and highly-efficient transmitters. However, with regard to agility and reconfigurability, current state-of-the-art approaches are still very restrictive. This paper proposes a new architecture based on a tunable delta-sigma modulator suitable...
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