摘要
首先介绍两种典型的适用于干涉测量系统的数字基带转换方法,然后采用并行结构和多相结构对正交混频方法进行改进,得到高效的基于并行下变频的方法。结合多相滤波的高效性与正交混频的灵活性,得到更加高效的多相滤波与正交混频结合法。通过比较两种方法的效率和功耗,得到多相滤波与正交混频结合法性能更优的结论。
Two typical digital baseband converting methods used in interference measurement system are introduced.The method based on parallel NCO uses parallel structure and poly- phase structure to improve the performance of the traditional orthogonal mixing method.Through combining the high efficiency of the method based on poly- phase filter bank channelization and the flexibility of the method based on orthogonal mixing,more efficient digital baseband converting method is proposed.The efficiency and power consumption of the method based on parallel NCO and the proposed method in this paper are compared.The result shows that the proposed method has better performance.
出处
《遥测遥控》
2016年第2期36-42,60,共8页
Journal of Telemetry,Tracking and Command
关键词
干涉测量系统
数字基带转换器
多相滤波
正交混频
Interference measurement system
Digital baseband converter
Poly-phase filter
Orthogonal mixing