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

Fusion

paul - - Load All Authors

File last commit:

r3:42c6ea189885 default


                r11:c08a29e29fbf

tip default

Download file

             twiddle_factors.py
        
                    30 lines
            
             | 753 B
            
                | text/x-python
            
             |
                PythonLexer
            
             / twiddle_factors.py
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      # 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

      		self.w = []

      		self.w_int = []

      	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 ) )

      		self.w = w[:]

      		return w

      	def twiddle_factors_dot_vhd_generation(self):

      		print 'size of w = ', len(self.w)

      		nb_bits = 16

      		print self.w

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

      			w_int_re = int(self.w[k].real * 2**(nb_bits-1))

      			w_int_im = int(self.w[k].imag * 2**(nb_bits-1))

      			self.w_int.append(  w_int_re + 1j * w_int_im )

      		print self.w_int

      		pass

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				# 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
				self.w = []
				self.w_int = []

				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 ) )
				self.w = w[:]
				return w

				def twiddle_factors_dot_vhd_generation(self):
				print 'size of w = ', len(self.w)
				nb_bits = 16
				print self.w
				for k in range( self.N / 2 ):
				w_int_re = int(self.w[k].real * 2**(nb_bits-1))
				w_int_im = int(self.w[k].imag * 2**(nb_bits-1))
				self.w_int.append( w_int_re + 1j * w_int_im )
				print self.w_int
				pass