滤波器实现
DSP System Toolbox™ 提供滤波器模块和 System object，使您能够在 MATLAB® 和 Simulink® 中对流信号进行滤波。除了传统的 FIR 和 IIR 滤波器，此工具箱还提供专用滤波器，如多速率多级滤波器、波数字滤波器和法罗滤波器。
精选示例
Multistage Rate Conversion
Design multistage rate conversion filters.
Multistage Rate Conversion Using FIR Rate Converter
Compare multistage rate conversion with single stage rate conversion using the
dsp.FIRRateConverter object.
Time Delay and Scaling in Multirate DSP Filters
Effect of time delay and scaling in multirate filters. Use
outputDelay function to calculate the time delay and
scaling.
Overlap-Add/Save
Filter a sinusoid with the Overlap-Add and Overlap-Save FFT methods using the Frequency-Domain FIR filter block.
IF Subsampling with Complex Multirate Filters
Use complex multirate filters in the implementation of Digital Down-Converters (DDC). The DDC is a key component of digital radios. It performs the frequency translation necessary to convert the high input sample rates typically found at the output of an analog-to-digital (A/D) converter down to lower sample rates for further and easier processing. In this example, we will see how an audio signal modulated with a 450 kHz carrier frequency can be brought down to a 20 kHz sampling frequency. After a brief review of the conventional DDC architecture, we will describe an alternative solution known as Intermediate Frequency (IF) subsampling and we will compare the respective implementation cost of these two solutions. This example requires a Fixed-Point Designer™ license.
Apply Adaptive Noise Canceling to Fetal Electrocardiography
Apply adaptive filters to noise removal using adaptive noise canceling (ANC) in fetal electrocardiography.
