An All-Digital 8-DPSK Polar Transmitter with SecondOrder Approximation Scheme and Phase RotationConstant Digital PA for Bluetooth EDR in 65nm CMOS

📋 论文概要

该论文提出了一种全数字8-DPSK极性发射机，通过二阶近似方案和相位旋转恒定数字功率放大器，解决了非恒定包络调制在环路带宽以上调制精度不足的问题，实现了蓝牙EDR标准的8-DPSK调制。

💡 主要创新点

• 在DCO增益计算中采用二阶近似方案，提高了调制精度。
• 引入相位旋转恒定数字PA，实现了非恒定包络调制。

🏷 关键词

📄 原文摘要

area reduction in the analog/RF part is inevitable. While all-digital polar transmitters achieving a small die size are attracting attention and their application to Bluetooth Basic Rate and GSM standards is now the reality [3,4], due to their shortcoming in the modulation accuracy above their loop bandwidth, it is very difficult to apply it to non-constant envelope modulations. This paper reports on a polar transmitter that is capable of 8-DPSK modulation for the Bluetooth EDR standard. It implements the second-order approximation scheme in the gain calculation of the DCO and a phase rotation-constant digital PA. It achieves DEVM of 6.1% at 0dBm output in sending 8-DPSK signal for Bluetooth EDR, drawing 35mA from a 1.2V supply and occupies 0.75×0.75mm2. Figure 9.8.1 shows the block diagram of the proposed all-digital polar transmitter. The differences from the convent

👥 作者与机构

Hiroyuki Kobayashi, Shouhei Kousai, Yoshiaki Yoshihara, Mototsugu Hamada

Toshiba Semiconductor, Kawasaki, Japan As single-chip implementation of Bluetooth transceivers gains popularity [1,2],