A 3.8 mW Sub-Sampling Direct RF-to-Digital Converter for Polar Receiver Achieving 1.94 Gb/s Data Rate with 1024-APSK Modulation
A 3.8 mW Sub-Sampling Direct RF-to-Digital Converter for Polar Receiver Achieving 1.94 Gb/s Data Rate with 1024-APSK Modulation
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用于 Polar 接收器的 3.8 mW 子采样直接射频数字转换器，通过 1024-APSK 调制实现 1.94 Gb/s 数据速率
DOI：
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发表时间：
2019
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通讯作者：
F. Dai
中科院分区：
文献类型：
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作者：
Hechen Wang;Zhan Su;Haoyi Zhao;Yanjie Wang;F. Dai
本文提出了一种直接射频-数字转换器（RDC）。它由一对tdc、一个ADC和一个精确采样位置控制系统组成。与传统的直接射频采样接收器不同，RDC以基带速率对输入射频信号进行采样。它能够将接收到的调制射频信号的相位和幅度直接数字化。它兼容多种调制方式，在使用APSK时，系统对相位噪声和线性度的要求较低。在6 GHz载波下，RDC在1024-APSK下的最大速率为1.94 GB/s，功耗仅为3.8mW。
This paper presents a direct RF-to-digital converter (RDC) for polar RX. It consists of a pair of TDCs, an ADC, and a precise sampling position control system. Unlike conventional direct-RF sampling receivers, the RDC samples the input RF signal at baseband rate. It is capable of directly digitizing the phase and amplitude of the received modulated RF signals. It is compatible with a variety of modulations and has advantages of relaxed system requirements on phase noise and linearity when APSK is used. The RDC achieves a max rate of 1.94 GB/s with 1024-APSK at a carrier of 6 GHz, consuming only 3.8mW.