波谱学杂志2026，Vol.43Issue(1)：16-26,11.DOI:10.11938/cjmr20253183
一种基于CORDIC的磁共振射频脉冲发生器设计
A Design of CORDIC-based Magnetic Resonance RF Pulse Generator
摘要
Abstract
In nuclear magnetic resonance(NMR)systems,the radio frequency(RF)pulse generator critically influences imaging quality.Traditional direct digital synthesis(DDS)techniques rely on large-capacity lookup tables to achieve high precision,which results in excessive consumption of on-chip block random access memory(BRAM)resources and limits flexibility.This study presents a novel RF pulse generator design based on the coordinate rotation digital computer(CORDIC)algorithm.By integrating a custom CORDIC core within a field-programmable gate array(FPGA),the proposed system achieves digital modulation of RF signal's frequency,phase,and amplitude.Combined with a Zynq-7000 system-on-chip(SoC),this design delivers a highly integrated and low-power hardware architecture.Experimental results demonstrate that the generator can output RF pulses with a frequency resolution of 0.046 Hz and a phase resolution of 0.005 5˚,while reducing BRAM resources occupied by four channels by approximately 21.4%compared to the traditional DDS solution.This design offers a feasible solution for achieving miniaturization and high performance in the RF front-end of NMR instruments.关键词
核磁共振/坐标旋转数字计算机(CORDIC)/射频脉冲发生器/片上随机块存储器(BRAM)Key words
NMR/CORDIC/radio frequency pulse generator/BRAM分类
数理科学引用本文复制引用
刘颖,卢志豪,吕海龙,章浩伟..一种基于CORDIC的磁共振射频脉冲发生器设计[J].波谱学杂志,2026,43(1):16-26,11.基金项目
国家自然科学基金资助项目(61101174) （61101174）
上海介入医疗器械工程技术研究中心项目(NO.18DZ2250900). （NO.18DZ2250900）
