HG_REPOSITORIES/LPP/INSTRUMENTATION/SOLO_LFR/LFR_EMULATOR Files · twiddle_factors.py

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HG_REPOSITORIES » LPP » INSTRUMENTATION » SOLO_LFR » LFR_EMULATOR

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Clone from http://pc-instru.lpp.polytechnique.fr:5000/LFR_EMULATOR

test_fft directory added to the repository

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             twiddle_factors.py
        
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      # exp( - j 2 pi k / N ) = W^k_N

      from math import exp, cos, sin, pi

      class TwiddleFactors(object):

      	"""docstring for TwiddleFactors"""

      	def __init__(self, N):

      		super (TwiddleFactors, self).__init__()

      		self.N = N

      	def build_twiddle_factors(self):

      		w = []

      		for k in range( self.N / 2 ):

      			teta = - 2 * pi * k / self.N

      			w.append(  cos ( teta ) + 1j * sin( teta ) )

      		return w

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				# exp( - j 2 pi k / N ) = W^k_N

				from math import exp, cos, sin, pi

				class TwiddleFactors(object):
				"""docstring for TwiddleFactors"""
				def __init__(self, N):
				super (TwiddleFactors, self).__init__()
				self.N = N

				def build_twiddle_factors(self):
				w = []
				for k in range( self.N / 2 ):
				teta = - 2 * pi * k / self.N
				w.append( cos ( teta ) + 1j * sin( teta ) )
				return w