一种基于并行结构的宽带实时数字下变频技术  

A Technology of Real-time Wideband DDC Based on Parallel Architecture

作　　者：王猛[1] 田书林[1] 王志刚[1] 

机构地区：[1]电子科技大学自动化工程学院,四川成都611731

出　　处：《计量学报》2012年第4期346-350,共5页Acta Metrologica Sinica

基　　金：国家自然科学基金（60772145）;新世纪优秀人才支持计划（NCET-06-0808）

摘　　要：提出一种并行处理结构，通过多个数字下变频通道并行处理，能有效降低采样翠和数据处理速翠，解决超宽带数字中频处理的难题。分析了并行数字下变频技术的原理推导，分析了多路NCO输出相位差及影响信噪比的误差因素，为具体工程设计提供指标分配依据。最后通过实验平台验证方法的正确性。A presents a parallel processing architecture is described. It can solve some difficult problems of ultra- wideband digital IF processing through multiple channels of parallel processing, which can effectively reduce the sample rate and process cost. The parallel digital down conversion technique principle is deduced, phase difference of muhi-NCO＇s output and error factor for reducing SNR are analyzed, and index distribution basis for the specific engineering design is provided. Finally, its correctness can be verified by experiment.

关 键 词：计量学 宽带数字中频处理 数字下变频 相位差 量化效应 

分 类 号：TB973[一般工业技术—计量学]