Wideband all-digital transmitter based on multicore DSM

Abstract

This paper presents a new wideband all-digital pulsed transmitter architecture based on delta-sigma modulation. The proposed architecture uses a parallel approach for the signal modulator to augment the digital system sampling frequency. The improvement of the sampling frequency allows to enhancement of the transmitter bandwidth without the need of high speed digital logic for the pulse modulator. The FPGA prototype results show the feasibility and advantages of the proposed architecture in terms of bandwidth. The measurements show that the proposed transmitter is capable of a 122 MHz bandwidth signal transmission, which represents a significant improvement over the current state-of-the-art bandwidth for all-digital pulse transmitters.