Due to the heavy reliance of millimeter-wave (mmWave) wireless systems on directional
links, beamforming (BF) with high-dimensional arrays is essential for cellular systems in …

This article presents a wideband, energy-efficient digital transmitter (DTX) suitable for multi-
mode/multi-band wireless communication applications. It features various operation modes …

This work presents a wideband digital polar transmitter (DPTX) with an integrated capacitor-
digital-to-analog converter (C-DAC)-based digital-to-phase converter (DPC). A normalized …

We present a wideband, 12-bit four-way Doherty Cartesian digital transmitter (DTX) featuring
an innovative 50%-LO signed interleaved up-conversion technique that enables close to …

This article presents a wideband-bit direct-digital RF modulator (DDRM) operating in a 0.5-to-
3-GHz band for 5G transmitters. The proposed digital Cartesian modulator features an …

The RF performance of current-scaling digital transmitters (DTX) with polar, unsigned
Cartesian, signed Cartesian, and multiphase architectures have been compared regarding …

This article presents a highly programmable time-approximation filter (TAF) that can be
embedded in a direct RF transmitter architecture. The proposed filter technique …

A four-element multi-input multi-output (MIMO) switched capacitor power amplifier (SCPA) in
22-nm fully depleted silicon-on-insulator (FD-SOI) is presented as a software-defined radio …

This paper presents an advanced yet simple digital pre-distortion (DPD) technique for digital
I/Q transmitters (DTXs). Exploiting the I/Q orthogonality, an effective 2× 1-D DPD procedure …

This article presents a multimode direct radio frequency (RF) transmitter capable of a high in-
band dynamic range and a low out-of-band (OOB) noise floor. It features a hybrid digital-to …