A 76-to-81GHz Direct-Digital 7b 14GS/s Double-Balanced I/Q Mixing-DAC Radar-Waveform Synthesizer

📋 论文概要

该论文提出了一种76-81GHz直接数字7位14GS/s双平衡I/Q混合DAC雷达波形合成器，解决了传统分数N锁相环在快速chirp波形生成中微秒级建立时间的问题，适用于大规模虚拟MIMO天线阵列的FMCW雷达。

💡 主要创新点

• 采用直接数字波形合成架构，消除锁相环的chirp建立时间限制，实现快速频率切换。
• 设计双平衡I/Q混合DAC，在14GS/s高速率下实现7位分辨率，支持毫米波频段直接输出。

🏷 关键词

📄 原文摘要

require virtual MIMO antenna arrays with hundreds of elements. To operate such arrays without compromising range and velocity resolution and to have a sufficient SNR for a longrange operation, FMCW MIMO radars require fast chirps of hundreds of MHz within a few microseconds in combination with slow-time code-division multiple-access (CDMA) and doppler-division multiple-access (DDMA) MIMO implemented with phase rotators. Scaling radar performance with FMCW waveforms [1] becomes limited by microsecond chirp settling time of conventional fractional-N synthesizers [2,3], wasting a substantial fraction of the available radar frame and limiting implementation efficiency. This work introduces a direct conversion 76-to-81GHz-radar digital waveform generator

👥 作者与机构

Marios Neofytou1,2, Kostas Doris1,2, Marcello Ganzerli1, Maarten Lont1, Georgi I. Radulov2

NXP Semiconductors, Eindhoven, The Netherlands Eindhoven University of Technology, Eindhoven, The Netherlands 1 2 Automotive radars that can achieve angular resolution below 1 degree