hsignal-0.1.0.1: Signal processing Source code Contents Index

Numeric.Signal Portability uses FFI Stability provisional Maintainer haskell.vivian.mcphail <at> gmail <dot> com

Description

Signal processing functions

Synopsis

hamming :: Int -> Vector Double pwelch :: Int -> Int -> Vector Double -> (Vector Double, Vector Double) fir :: Int -> [(Double, Double)] -> Int -> Int -> Vector Double -> Vector Double standard_fir :: Int -> [(Double, Double)] -> Vector Double broadband_fir :: Int -> (Int, Int) -> Vector Double freqzF :: Vector Double -> Vector Double -> Int -> Vector Double -> Vector Double freqzN :: Vector Double -> Vector Double -> Int -> Int -> (Vector Double, Vector Double) filter :: Vector Double -> Vector Double -> Int -> Vector Double -> Vector Double broadband_filter :: Int -> (Int, Int) -> Vector Double -> Vector Double analytic_signal :: Vector Double -> Vector (Complex Double) analytic_power :: Vector (Complex Double) -> Vector Double analytic_phase :: Vector (Complex Double) -> Vector Double

Documentation

hamming Source

:: Int length -> Vector Double the Hamming coeffficents coefficients of a Hamming window

pwelch Source

:: Int sampling rate -> Int window size -> Vector Double input signal -> (Vector Double, Vector Double) (frequency index,power density) Welch (1967) power spectrum density using periodogram/FFT method

fir Source

:: Int order (one less than the length of the filter) -> [(Double, Double)] band edge frequency, nondecreasing, [0, f1, ..., f(n-1), 1] ^ band edge magnitude -> Int grid spacing -> Int transition width -> Vector Double smoothing window (size is order + 1) -> Vector Double the filter coefficients produce an FIR filter

standard_fir :: Int -> [(Double, Double)] -> Vector Double Source

standard FIR filter | FIR filter with grid a power of 2 greater than the order, ramp = grid/16, hamming window

broadband_fir Source

:: Int sampling rate -> (Int, Int) (lower,upper) frequency cutoff -> Vector Double filter coefficients a broadband FIR

freqzF Source

:: Vector Double zero coefficients -> Vector Double pole coefficients -> Int sampling rate -> Vector Double frequencies -> Vector Double frequency response determine the frequency response of a filter, given a vector of frequencies

freqzN Source

:: Vector Double zero coefficients -> Vector Double pole coefficients -> Int sampling rate -> Int number of points -> (Vector Double, Vector Double) (frequencies,response) determine the frequency response of a filter, given a number of points and sampling rate

filter Source

:: Vector Double zero coefficients -> Vector Double pole coefficients -> Int sampling rate -> Vector Double input signal -> Vector Double output signal filters the signal

broadband_filter Source

:: Int sampling rate -> (Int, Int) (lower,upper) frequency cutoff -> Vector Double input signal -> Vector Double output signal a broadband filter

analytic_signal :: Vector Double -> Vector (Complex Double) Source

an analytic signal is the original signal with Hilbert-transformed signal as imaginary component

analytic_power :: Vector (Complex Double) -> Vector Double Source

the power (amplitude^2 = v * (conj c)) of an analytic signal

analytic_phase :: Vector (Complex Double) -> Vector Double Source

the phase of an analytic signal

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