帶通信號的數(shù)字正交采樣定理及優(yōu)化設(shè)計
THE DIGITAL QUADRATURE SAMPLING THEOREM FOR BANDPASS SIGNAL AND ITS OPTIMUM DESIGN
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摘要: 在數(shù)字正交采樣中,帶通信號存在頻譜遷移問題,雖然滿足帶通信號的采樣定理,仍可能產(chǎn)生頻譜混疊。該文證明了帶通信號的數(shù)字正交采樣定理,并討論了這種采樣系統(tǒng)的優(yōu)化設(shè)計。
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關(guān)鍵詞:
- 帶通信號; 正交采樣; 采樣定理; 混疊
Abstract: For bandpass signal under digital quadrature sampling, there is spectrum shifting. Although the sampling frequency satisfies the sampling theorem, it may cause spectrum aliasing. The digital quadrature sampling theorem for bandpass signal is presented and the optimum design for the sampling system is also discussed in this paper. -
楊福生,戴先中,帶通信號的采樣定理,信號處理,1986,2(1),58-61.[2]王飛雪,等,帶通信號采樣定理和全數(shù)字式正交檢波器的設(shè)計,電子科學學刊,1999,21(3),307-310.[3]王橋,吳樂南,任意帶通信號的采樣定理與頻帶整體適應性數(shù)據(jù)表示,電子科學學刊,2000,22(3),398-401.[4]H.L. Liu, A. Ghafoor, et al., A new quadrature sampling and processing approach, IEEE Trans.on AES, 1989, AES-25(3), 733-747.[5]L.E. Pellon, A double Nyquist digital product detector for quadrature sampling, IEEE Trans.on Signal Processing, 1992, SP-40(7), 1670-1681.[6][美]詹姆,崔保延,寬帶接收機數(shù)字技術(shù),電子工業(yè)部第二十九所情報室,電子戰(zhàn)技術(shù)文選編輯部,19967,第八章.[7]吳遠斌,一種數(shù)字式正交檢波器的設(shè)計,電子科學學刊,1997,19(1),68-71.[8]林云松,等,基帶采樣率內(nèi)任意帶通信號的正交采樣,電子科學學刊,1999,21(3),296-301. -
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