Study on All-Digital Transmitter with Vector Synthesis of Different-Phase Carriers

本研究首先针对正交调变包络脉宽调变（EPWM）型开关式发射机，进行包含功率放大器的调变精度量测。此外，本研究提出了有效的解调功率效率（EDPE）作为一个品质因数，以代表一个正交调制EPWM发射机的实质功率效率。此外，本研究提出一个功率放大器插入横向滤波器与180度的混合功率合成，以抑制带外量化噪声。

This study first performs an modulation accuracy measurement including a power amplifier for a quadrature-modulation envelope pulse-width-modulation (EPWM) type switching-mode transmitter. In addition, this study proposes effective demodulation power efficiency (EDPE) as a figure of merit to represent the substantial power efficiency for a quadrature-modulation EPWM transmitter. Furthermore, the study proposes a power-amplifier inserted transversal filter with 180-degree hybrids for power combining to suppress the out-of-band quantization noise.