面向带通信号的随机解调模拟信息转换器设计  

Design of Random Demodulation Analog Information Converter for Bandpass Signals

作　　者：颜祺源 YAN Qiyuan(College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学物理与信息工程学院,福建福州350108

出　　处：《仪表技术》2024年第5期1-4,17,共5页Instrumentation Technology

摘　　要：模拟信息转换器作为压缩感知理论的实际应用,能够在信号数字化的同时实现压缩采样,显著降低了系统功耗及数据处理负担,但在通信领域,高频带通信号的奈奎斯特率通常极高,这要求模拟信息转换器系统具备极高的采样频率,从而增加了设计复杂度。针对此挑战,提出了一种基于带通Sigma-Delta调制器的随机解调模拟信息转化器架构,以低速伪随机序列对带通信号进行解调处理,有效避免了高速伪随机信号混频模块可能引入的高功耗及电路设计误差等问题。此架构不仅将模拟信息转换器的应用范围从基带信号拓展至带通信号,还成功解决了伪随机信号转换速率受带通信号最高频率研制的技术难题。As a practical application of compressive sensing theory,analog information converters can achieve compressed sampling while digitizing signals,significantly reducing system power consumption and data processing burden.However,in the field of communication,the Nyquist rate of high-frequency bandpass signals is usually extremely high,which requires analog information converter systems to have extremely high sampling frequencies,thereby increasing design complexity.In address this challenge,a random demodulation analog information converter architecture based on a bandpass Sigma-Delta modulator is proposed.The bandpass signal is demodulated using a low-speed pseudo-random sequence,effectively avoiding high power consumption and circuit design errors that may be introduced by the highspeed pseudo-random signal mixing modules.This architecture not only expands the application range of analog information converters from baseband signals to bandpass signals,but also successfully solves the technical problem of developing pseudo-random signal conversion rates that are affected by the highest frequency of bandpass signals.

关 键 词：模拟信息转换器 SIGMA-DELTA调制器 带通采样 亚奈奎斯特率 

分 类 号：TH83[机械工程—仪器科学与技术] TJ763[机械工程—精密仪器及机械]