A Modulator-less Beam Steering Transmitter based on a revised DDS-PLL Phase Shifter ArchitecturePublished online: Feb 8, 2018
This paper details the design and implementation of a modulator-less beam steering transmitter based on a revised DDS-PLL phase shifter architecture. The proposed topology targets low data rate communications for Internet-of-Things systems, and has been demonstrated using an FPGA evaluation board and a custom PCB with four PLLs centered at 2.453-GHz. Measured system performance for an experimental 32-kbps data rate achieved through a 16-PSK modulation scheme are discussed. The proposed architecture is frequency independent, can be used in multi-band devices and has the potential for being integrated as an RF System-on-Chip.
Keywordsdirect digital synthesizer (DDS), phase-locked loop (PLL), modulator-less, beam steering, polar transmitter, low data rate communications, Internet of Things (IoT).
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