A 3.5-GHz Duo-Binary-Encoding-Assisted Envelope Delta-Sigma Digitized Transmitter for Bandwidth-Efficient Three-Level-Envelope Power Amplification

This paper introduces a duo-binary-encoding-assisted EDSM technique that converts two-level EDSM signals into bandwidth-efficient, three-level envelope signals. Implemented in a 3.5 GHz 130 nm CMOS transmitter. Simulations show a 44.9 dB peak SQNR, significantly outperforming conventional two-level EDSM (16 dB higher) and comparable three-level EDSM (6.6 dB higher), demonstrating a high-performance, bandwidth-efficient digital transmitter solution.