WAdaptive equalizer
WAliasing
WAnalog-to-digital converter
WDigital antenna array
WAudio forensics
WBandlimiting
WBeta encoder
WDelta modulation
WDifferential nonlinearity
WDigital filter
WDigital signal (signal processing)
WDigital signal processor
WDigital-to-analog converter
WDirac delta function
WDirect digital synthesis
WDiscrete Fourier transform
WDiscrete wavelet transform
WDither
WFast Fourier transform
WFast Walsh–Hadamard transform
WFilter bank
WFourier analysis
WGerchberg–Saxton algorithm
WInstantaneous phase and frequency
WKaiser window
WLattice delay network
WLifting scheme
WMatched Z-transform method
WMulti-core processor
WMUSIC (algorithm)
WNyquist frequency
WNyquist ISI criterion
WNyquist rate
WNyquist–Shannon sampling theorem
WParks–McClellan filter design algorithm
WPipelining (DSP implementation)
WPitch correction
WPitch shift
WQuantization (signal processing)
WSample and hold
WSampling (signal processing)
WSignal
WSIMD
WSinc filter
WSogitec 4X
WSpectral flatness
WSpectral leakage
WSpectral slope
WTalk box
WUnfolding (DSP implementation)
WDirac delta function
WWindow function
WXPIC