带通信号的数字正交采样定理及优化设计
THE DIGITAL QUADRATURE SAMPLING THEOREM FOR BANDPASS SIGNAL AND ITS OPTIMUM DESIGN
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摘要: 在数字正交采样中,带通信号存在频谱迁移问题,虽然满足带通信号的采样定理,仍可能产生频谱混叠。该文证明了带通信号的数字正交采样定理,并讨论了这种采样系统的优化设计。
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关键词:
- 带通信号; 正交采样; 采样定理; 混叠
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. -
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