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freqconv
- In digital signal processing, a digital down-converter (DDC) converts a digitized real signal centered at an intermediate frequency (IF) to a basebanded complex signal centered at zero frequency. In addition to downconversion, DDC’s typically decimat
FPGA_FILTER
- 利用FPGA设计降采样滤波器的方法，希望对你有用-FPGA design using down-sampling filter, and I hope useful to you
digitaldownconversionbygpga
- 研究了高倍抽取的数字下变频设计，重点分析了基于级联积分梳状滤波器和级联半带滤波器的多级抽样频率算法。-Extraction of the high-powered digital down-conversion design, the focus of a cascaded integrator comb filter based on cascaded half-band filter and the multi-level sampling frequency algorithm.
MultHalfBand
- 多级半带滤波器的FPGA实现,采用6级滤波器实现的采样频率由3200Hz降为50Hz的抽取系统，前5级为半带滤波器,最后一级为普通FIR滤波器-Multi-level half-band filter FPGA, using six filters for sampling frequencies 50Hz down to 3200Hz extraction system for the front five and a half-band filter, the last stage of
dwn_sampler
- Multirate digital signal processing system which includes sampling rate conversion. This technique is necessary for systems with different input and output sampling rates, as the proposed multirate device is downsampler FPGA implementation of
CIC_filter
- 抽取:(接收端) 中频信号IF 20M(采样率是50M) 下变频信号 MIX_O 1M(50M) 采用CIC滤波器进行降采样率。 插值:(发送端) 基带信号上变频到1M，采样率是2.5M，采用CIC滤波器进行升采样率处理。 注释：升采样率或者降采样率不会改变原始信号的中心频率，但是频谱分布会发生改变。-Extraction: (receiver) IF signal 20M (sampling rate is 50M) down-conversion signal M
cic3s32
- 3阶cic滤波器，16位输出，32倍降采样处理(The 3 order CIC filter, 16 bit output, 32 fold down sampling processing)
ddc
- 下变频采样、本振和滤波三个过程涉及到的详细代码与注释(Detailed code and notes for down conversion sampling, local oscillator and filtering)