混合信号系统非均匀抽样信号的分析和重构

Analysis and Reconstruction of Non-uniformly Sampled Signals in Mixe-dsignal Integrated Circuits

混合信号系统的非均匀采样信号的重构算法是信号处理领域的一项重要研究内容。由于采样间隔是不均匀的,传统的Shannon采样定理己经不再适用,这就要求提出一些有效的算法来解决这个问题,已有的解决办法大多都是利用插值和迭代。通过使用一个多速率滤波器组,可以分析非均匀抽样信号的数字谱并且重建出均匀抽样序列,并通过计算机仿真验证了算法的正确性。该重构算法在工程实际中具有应用价值。

Reconstruction algorithm of nonuniformly sampled signals in mixed- signal integrated circuits is an important research component of digital signal processing subject. Since sampling is non -uniform, the traditional Shannon sampling theory isn＇t practicable. Then some effective algorithm is needed to solve this problem. Some existent methods are based on interpolation or iterative. A multirate filter bank structure is used to both analyse this non - uniform sampling and reconstruct uniformly sampled sequence,and the interpolanon algorithm is derived simulation agrees with the theoretical predictions. This algorithm is of application value in practice.