直接中频正交采样的Bessel内插实现  

The Bessel Interpolation Implementation of Direct IF Signal Quadrature Sampling

作　　者：朱荣新[1] 方姚生[1] 杨志敏[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《空军工程大学学报（自然科学版）》2002年第5期69-71,共3页Journal of Air Force Engineering University(Natural Science Edition)

摘　　要：提出了一种新的中频正交采样和处理方法 ,即直接在中频对信号进行采样 ,然后利用数字信号处理的办法产生正交复基带信号。通过选取工程较易实现的中点Bessel内插函数 ,得到正交的两路基带I、Q信号 ,从理论与大量测试中表明相位误差比传统相干检波器小一个数量级 ,且无幅度误差 ,大大提高了检波器的性能。This paper provides a new IF quadrature sampling and processing approach by sampling IF signal directly and produces quadrature complex signal by digital signal processing. Digitized in-phase(I) and quadrature(Q) components are obtained through choosing middle point Bessel interpolation function implemented easily in engineering project. Its phase errors derived from theory and a lot of tests are an order of magnitude less than conventional detectors, and no amplitude errors. This approach provides improved accuracy. A basic hardware scheme and a typical experimental result are also given.

关 键 词：中频正交采样 Bessel内插 相干检波 数字滤波器 信号处理 相位误差 采样频率 

分 类 号：TN911.7[电子电信—通信与信息系统]