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Cache Rules Everything Around Me

Jay Kickliter JayKickliter

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Cache Rules Everything Around Me
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JayKickliter / Julia FFTS.jl
Last active Aug 29, 2015
Calling FFTS c functions from Julia
View Julia FFTS.jl
# Complex transforms
# Sign argument
# -1 = Complex to Complex reverse FFT
# 1 = Complex to Complex forward FFT
# ffts_plan_t *ffts_init_1d(size_t N, int sign);
# Create a plan for a forward 1D FFT of size 16
N = 2^16
Direction = 1
ffts_plan = ccall((:ffts_init_1d, "libffts"), Ptr{Void}, (Csize_t, Cint), N, Direction)
View LiquidDSP_Interface.jl
#==============================================================================#
# Kaiser Filter #
#==============================================================================#
fc = 0.15 # filter cutoff frequency
ft = 0.05 # filter transition
As = 60.0 # stop-band attenuation [dB]
mu = 0.0 # fractional timing offset
# estimate required filter length and generate filter
View PSKMod.jl
using Radio
using Winston
import DSP: welch_pgram
symbols = pskmod( 100000, 4, 4 )
noise = wgn(length(symbols), 5, "dBm", 50, true)
signal = symbols .+ noise
spectrum = welch_pgram( signal, 100, 50 )
spectrum = fftshift( spectrum )
spectrum = 10*log10( spectrum )
View Chrip-z Test.jl
# function czt( x::Vector )
x = ones(8)
N = length( x )
M = nextpow2( 2*N - 1 )
xx = zeros( Complex128, M )
yy = zeros( Complex128, M )
for n = 1:N
xx[n] = x[n]
yy[n] = exp( im * π/N * (n-1)^2 )
@JayKickliter
JayKickliter / ValidateIPAddress
Created Apr 21, 2014
Android: Validate IP Address
View ValidateIPAddress
String ipAddressPattern = Patterns.IP_ADDRESS.toString();
if (theAddress.matches( ipAddressPattern )) {
View FixIPPDylibs.jl
ippLibPath = "/opt/intel/composer_xe_2013_sp1.3.166/ipp/lib"
originalFolder = pwd()
cd( ippLibPath )
function fix_ipp_dylib( dylibFileName, path )
correct_id = joinpath( ippLibPath, dylibFileName ) # we want all the dylib ID's to have the full path
cmd_get_id = `otool -DX $dylibFileName` # Get the dylib's ID (we want it to be path+filename)
cmd_set_id = `install_name_tool -id $correct_id $dylibFileName`
results = readlines( cmd_get_id )
original_id = strip( results[1] ) # The first line is a header, the second is the dylib's ID
View IPP Interface Test.ipynb
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View Mixers.ipynb
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View PolyInterp.jl
import IPPDSP
function polyize{T}( h::Vector{T}, interpolation )
hLen = length( h )
tapsPerPhase = int( ceil( hLen/interpolation ))
pfbSize = tapsPerPhase * interpolation
# check that the vector is an integer multiple of interpolation
if hLen != pfbSize
hExtended = similar( h, pfbSize )
hExtended[1:hLen] = h
View PolyInterp.jl
import IPPDSP
function polyize{T}( h::Vector{T}, interpolation )
hLen = length( h )
tapsPerPhase = int( ceil( hLen/interpolation ))
pfbSize = tapsPerPhase * interpolation
# check that the vector is an integer multiple of interpolation
if hLen != pfbSize
hExtended = similar( h, pfbSize )
hExtended[1:hLen] = h
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