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Modulation form converter

阅读:175发布:2022-06-19

专利汇可以提供Modulation form converter专利检索,专利查询,专利分析的服务。并且PURPOSE:To reduce the quantity of noise equivalent to an output point by using a filter group as a noncirculation type polyphase filter (FIR filter)group with less noise production and a discrete filter conversion circuit (DFT) in combination. CONSTITUTION:A digital FDM signal is given to a thinning circuit 8-2 from an input terminal 8-1, and sent to a CDF filter (circulation type complex filter) 8-5 via a PDF/FIR filter group (noncirculation type polyphase filter group) 8-3, a 14-point DFT (discrete Fourier transformation circuit) 8-4 and the real part is extracted by a circuit Re(.)8-6. Then a TDM signal is extracted from an output terminal 8-9 via a waveform shaping circuit (BDF) 8-7 and a multiplexer circuit (MUX) 8-8. Since the PDF/FIR filter group is used in this way, the noise by the PDF/FIR 83 is less. Thus, noise from the FDM-TDM converter is reduced. Thus, the length of arithmetic operation word is less and the hardware is saved.,下面是Modulation form converter专利的具体信息内容。

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