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数字信号处理词汇集spectrumconversion章系统信号1system signal滤波器filter数字信号频谱digital signal保持hold模/数转换analog-to-digital量化电平数字滤波quandigital filteringtizationlevel采样sample频域frequency数字代码domaindigital code高频时域hightime domainfrequency低频low frequency高通滤波器high pass filter低通滤波器带low passfilter带阻滤波器band stopfilter通滤波器零band passfilter平滑signal smooth阶保持信号采zero orderhold频率分量frequency elements样周期sampling period传感器电压sensor voltage图像处理电image processing章流2current模拟信号analog signal抗镜像滤波器采样间隔anti-imaging filtersampling interval抗混叠滤波器二采样周期anti-aliasing filtersampling period采样频率=采样速率sampling frequencysampling rate采样定理奈奎斯特采样率sampling theoremN yquistsampling rate奈奎斯特频率Nyquist frequency奈奎斯特范围过采样欠Nyquist rangeoversampling undersampling采样量化步长量化噪声quantization stepquantization noisebit比特率rate章数字函数合成函数二维3digital functioncomposite function数字信号two-dimensional digitalsignal语音信号量化方案speech signalquantization scheme脉冲函数单位脉冲函数阶impulse functionunit impulsefunction跃函数累函数:step functionpower function指数函数正弦函数exponential functionsine function余弦函数复平面cosine functioncomplex plain欧拉恒等式飞模拟频率Euler identityanalog frequency数字频率采样间隔digital frequencysampling interval相移像素灰度级phase shiftpixel grayscale章滚降增益通带4roll-off gainpass band阻带带宽stop bandbandwidth线性系统叠加原理linear systemsuperposition时不变因果系统time-invariant causalsystem差分方程滤波器系数difference equationfilter coefficient递归滤波器非递归滤波器recursive filternonrecursive filter有限字长效应finite wordlength effect脉冲响应impulse response无限脉冲响应infinite impulse responseHR有限脉冲响应finite impulseresponse FIR滑动平均滤波器阶跃响应m ovingaverage filterstep response章卷积差分方程5convolution differenceequation滑动平均滤波器moving averagefilter脉冲响应镜像impulseresponsemirror image边界效应boundary effect输入序列input sequence暂态效应稳态transient effectsteady state锐变shape transition低通特征low passcharacteristic卷积表convolution table章变换收敛域6z transform z regionof convergence逆变换传输函数inverse ztransformztransfer function部分分式展开partial fractionexpansion覆盖法零点极点cover-up methodzero pole临界稳定不稳定marginally stableunstable章傅立叶变换滤波器形状7Fourier Transformfilter shape频率响应frequency response频率特性frequency characteristics离散时间傅立叶变换Discrete TimeFourier Transform幅度响应相位响应magnitude responsephase response传输函数相位差transfer functionphase difference采样频率sampling frequency章白噪声幅度频谱8white noisemagnitude spectrum相位频谱phase spectrum离散傅里叶级数discrete FourierseriesDFS章有限脉冲响应滤波器9finite impulseresponse filter无限脉冲响应滤波器infinite impulseresponse filter窗函数通带波稳定性window functionstability纹通带边缘阻带波纹pass band ripple stopbandripple频率过渡带宽pass bandedge frequency度汉宁窗矩形窗哈transition widthRectangular Window布莱克曼窗明窗Hanning WindowHamming Window凯塞窗Blackman WindowKaiser Window相位失真理想低通滤波器phase distortionidle lowpassfilter项数衰减增益number ofterms attenuationgain采样频率章sampling frequency10无限脉冲响应滤波器infinite impulseresponse filterHRprewarping equation预扭曲方程巴特沃斯滤波器Butterworth filter双线性变换bilinear transformation切比雪夫型滤波器Chebyshev TypeI filterI切比雪夫型滤波器Chebyshev TypeII filterII椭圆滤波器elliptic filter脉冲响应不变法Impulse invariancemethod。