マルチレートフィルターと多段フィルター

間引き、内挿、レート変換

オブジェクト

単一ステージフィルター

`dsp.Channelizer`	Polyphase FFT analysis filter bank
`dsp.ChannelSynthesizer`	Polyphase FFT synthesis filter bank
`dsp.FarrowRateConverter`	Polynomial sample rate converter with arbitrary conversion factor
`dsp.FIRDecimator`	Polyphase FIR decimator
`dsp.FIRHalfbandDecimator`	Halfband decimator
`dsp.FIRHalfbandInterpolator`	Halfband interpolator
`dsp.FIRInterpolator`	Polyphase FIR interpolator
`dsp.FIRRateConverter`	Sample rate converter
`dsp.HDLChannelizer`	Polyphase filter bank and fast Fourier transform—optimized for HDL code generation
`dsp.HDLFIRDecimator`	Finite impulse response (FIR) decimation filter—optimized for HDL code generation
`dsp.HDLFIRRateConverter`	Upsample, filter, and downsample—optimized for HDL code generation
`dsp.IIRHalfbandDecimator`	Decimate by factor of two using polyphase IIR
`dsp.IIRHalfbandInterpolator`	Interpolate by a factor of two using polyphase IIR

多段フィルター

`dsp.ComplexBandpassDecimator`	Extract a frequency subband using a one-sided (complex) bandpass decimator
`dsp.DigitalDownConverter`	デジタル信号を中間周波数 (IF) 帯域からベースバンドに変換して間引きする
`dsp.DigitalUpConverter`	Interpolate digital signal and translate it from baseband to IF band
`dsp.FilterCascade`	Create cascade of filter System objects
`dsp.SampleRateConverter`	Multistage sample rate converter

CIC フィルター

`dsp.CICCompensationDecimator`	Compensate for CIC decimation filter using FIR decimator
`dsp.CICCompensationInterpolator`	Compensate for CIC interpolation filter using FIR interpolator
`dsp.CICDecimator`	カスケード接続積分器櫛形 (CIC) フィルターを使用して信号を間引く
`dsp.CICInterpolator`	Interpolate signal using cascaded integrator-comb filter
`dsp.HDLCICDecimation`	Decimate signal using cascaded integrator-comb filter — optimized for HDL code generation

フィルターバンク

`dsp.DyadicAnalysisFilterBank`	Dyadic analysis filter bank
`dsp.DyadicSynthesisFilterBank`	Reconstruct signals from subbands
`dsp.SubbandAnalysisFilter`	Decompose signal into high-frequency and low-frequency subbands
`dsp.SubbandSynthesisFilter`	Reconstruct signal from high-frequency and low-frequency subbands

関数

`cascade`	Cascade of filter system objects
`convert`	Convert filter structure of discrete-time filter
`filter`	1 次元のデジタルフィルター
`polyphase`	Polyphase decomposition of multirate filter
`sysobj`	Create filter System object from discrete-time filter

ブロック

すべて展開する

単一ステージフィルター

Channelizer	Polyphase FFT analysis filter bank
Channelizer HDL Optimized	Polyphase filter bank and fast Fourier transform—optimized for HDL code generation
Channel Synthesizer	Polyphase FFT synthesis filter bank
Farrow Rate Converter	Polynomial sample-rate converter with arbitrary conversion factor
FIR Decimation	Filter and downsample input signals
FIR Decimation HDL Optimized	Finite impulse response (FIR) decimation filter—optimized for HDL code generation
FIR Halfband Decimator	Decimate signal using polyphase FIR halfband filter
FIR Halfband Interpolator	Interpolate signal using polyphase FIR half band filter
FIR Interpolation	Upsample and filter input signals
FIR Rate Conversion	Upsample, filter, and downsample input signals
FIR Rate Conversion HDL Optimized	Upsample, filter, and downsample input signal and generates optimized HDL code
IIR Halfband Decimator	Decimate signal using polyphase IIR halfband filter
IIR Halfband Interpolator	Interpolate signal using polyphase IIR halfband filter

多段フィルター

Complex Bandpass Decimator	Extract a frequency subband using a one-sided (complex) bandpass decimator
Digital Down-Converter	Translate digital signal from Intermediate Frequency (IF) band to baseband and decimate it
Digital Up-Converter	Interpolate digital signal and translate it from baseband to Intermediate Frequency (IF) band
Sample-Rate Converter	Multistage sample-rate conversion

CIC フィルター

CIC Compensation Decimator	Compensate for CIC filter using FIR decimator
CIC Compensation Interpolator	Compensate for CIC filter using FIR interpolator
CIC Decimation	Decimate signal using cascaded integrator-comb filter
CIC Interpolation	Interpolate signal using cascaded integrator-comb filter
CIC Decimation HDL Optimized	Decimate signal using cascaded integrator-comb filter optimized for HDL code generation

フィルターバンク

Dyadic Analysis Filter Bank	Decompose signals into subbands with smaller bandwidths and slower sample rates or compute discrete wavelet transform (DWT)
Dyadic Synthesis Filter Bank	Reconstruct signals from subbands with smaller bandwidths and slower sample rates or compute inverse discrete wavelet transform (IDWT)
Two-Channel Analysis Subband Filter	Decompose signal into high-frequency and low-frequency subbands
Two-Channel Synthesis Subband Filter	Reconstruct signal from high-frequency and low-frequency subbands

トピック

Multirate Filters

Defines a multirate filter and describes its uses.

Multistage Filters

Defines a multistage filter and describes its uses.

Filter Banks

Multirate filters alter the sample rate of the input signal during the filtering process. Such filters are useful in both rate conversion and filter bank applications.

FIR ナイキスト (L 次帯域) フィルター設計

この例では、ローパス FIR ナイキストフィルターの設計法を示します。

Compare Single-Rate/Single-Stage Filters with Multirate/Multistage Filters

Shows the efficiency gains that are possible when using multirate and multistage filters for certain applications.

DSP System Toolbox ソフトウェアとフィルターデザイナーの使用

フィルターデザイナーアプリの固定小数点、マルチレート、およびスケーリングページを網羅した詳細な参照を提供します。

Multirate Filtering in Simulink

DSP System Toolbox™ software provides a collection of multirate filtering examples that illustrate typical applications of the multirate filtering blocks.

Calculate Channel Latencies Required for Wavelet Reconstruction

Learn how to calculate the latencies required for perfect wavelet reconstruction.

Variable-Size Signal Support DSP System Objects

List of System objects which support variable-sized signals in DSP System Toolbox.

Model Multirate Signal Processing Systems Using Dataflow

Use a Dataflow Subsystem to automatically calculate frame sizes in multirate systems.

注目の例

ウェーブレットのノイズ除去

この例では、DyadicAnalysis と DyadicSynthesis の System object を使用して、信号からノイズを除去する方法を示します。

スクリプトを開く

Simulink での GSM デジタルダウンコンバーター

この例では、GSM (Global System for Mobile) ベースバンド変換における固定小数点デジタルダウンコンバーターの定常状態の動作をシミュレーションする方法を説明します。モデル例では、Simulink® および DSP System Toolbox™ のブロックを使用して、TI GC4016 Quad デジタルダウンコンバーター (DDC) の動作をエミュレートします。

モデルを開く