Abstract
In this paper, based on the analysis and discussion of multistage decimation structure, we have studied and analyzed some key technologies of the digital filter in digital down conversion. Meanwhile, we have analyzed and summarized the decimation filter modules as CIC, HB, FIR of the digital filter, and a multistage decimation filter design program is given in this paper. An optimum design method is proposed in this article, which greatly reduce the complexity of system design and memory usage and has upgrade the data rate operation with great extent.
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