摘要
信号中频的非理想给带通采样有着不利影响,并影响正交变换的性能。文中分析了非理想带通采样情况下正交检波器的设计以及性能,对正交变换中最重要的低通滤波器的性能以及参数选择进行了仿真,并给出了低通滤波器的设计方法和该数字正交检波器在FPGA中的实现方法。
The non - ideal characteristic of intermediate frequency signal is unfavorable for band - pass sampling and affects the performance of quadrature transform. This paper discusses the design and performance of quadratrate mixer using non - ideal band - pass sampling. The performance and parameter selection of the low - pass filter, the most important factor in quadrature transform, is simulated. The design of the low - pass filter and the implementation of this digital quadrature demodulator on FPGA are also presented.
出处
《电子科技》
2008年第1期1-5,共5页
Electronic Science and Technology
关键词
非理想带通采样
正交变换
低通滤波法
优化设计
FPGA
non - ideal band - pass sampling
quadrature transform
low - pass method
optimal design
FPGA
