一種數(shù)字式正交檢波器的設(shè)計(jì)
A NOVEL DESIGN FOR DIGITAL QUADRATURE DETECTOR
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摘要: 本文提出了一種直接對(duì)中頻信號(hào)進(jìn)行A/D變換,然后在數(shù)字域中對(duì)信號(hào)進(jìn)行正交檢波處理的新方法。由于是在數(shù)字域中進(jìn)行檢波,因而可以得到高質(zhì)量的正交檢波信號(hào),高保真、高效率地提取載波信號(hào)中的信息,大大提高了系統(tǒng)的整機(jī)性能。最后還給出了一種實(shí)驗(yàn)方案和實(shí)驗(yàn)結(jié)果。
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關(guān)鍵詞:
- 中頻采樣; 數(shù)字檢波; 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. 伊伏斯著,卓榮邦譯.現(xiàn)代雷達(dá)原理.北京:電子工業(yè)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]吳遠(yuǎn)斌.DDS的設(shè)計(jì)與應(yīng)用.電子技術(shù)參考,1992, (2): 18-24. -
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