一种数字式正交检波器的设计
A NOVEL DESIGN FOR DIGITAL QUADRATURE DETECTOR
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摘要: 本文提出了一种直接对中频信号进行A/D变换,然后在数字域中对信号进行正交检波处理的新方法。由于是在数字域中进行检波,因而可以得到高质量的正交检波信号,高保真、高效率地提取载波信号中的信息,大大提高了系统的整机性能。最后还给出了一种实验方案和实验结果。
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关键词:
- 中频采样; 数字检波; 正交I、Q通道
Abstract: This paper presents a novel technique for directly IF sampling and digitally obtaining the inphase (I) and quadrature (Q) components of the IF signal. Because all subsequent processing and detection are accomplished in the digital domain, it can provide even more unproved I and Q signals and improve the overall performance greatly. Finally an experimental scheme is provided. -
杰里 L. 伊伏斯着,卓荣邦译.现代雷达原理.北京:电子工业出版社,1991, 3. 257-288.[2]Waters W M, Jarrett B R. Bandpass signal sampling and coherent detection. IEEE Trans on AES AES-18(4), Nov.1982. 731-736.[3]Rice D W, Wu K H. Quadrature sampling with high dynamic range. IEEE Trans on AES, 1982 AES-18(4): 736-739.[4]Coope H W. Why complicate frequency synthesis? Electronic Design, 1974, 22(15): 80-85.[5]吴远斌.DDS的设计与应用.电子技术参考,1992, (2): 18-24. -
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