Wed 28 Aug 21:38:52 CEST 2024

src/SimNDT/core/signal.py

@@ -0,0 +1,87 @@
+import numpy as	np
+from  math import pi, cos, sin
+import matplotlib.pyplot as plt
+
+def RaisedCosinePulse(t, Freq, Amplitude):
+	"""
+	Raised-Cosine Pulse
+	
+	""" 
+	N  = np.size(t,0)
+	P  = np.zeros((N,),dtype=np.float32)
+	for m in range(0,N):
+		if t[m] <= 2.0/Freq:
+			P[m] = Amplitude *(1-cos(pi*Freq*t[m]))*cos(2*pi*Freq*t[m])
+
+	return P
+
+
+def PulseUTsin(t,fc,NT, Amp):
+	"""
+	Gaussian Pulse
+
+	Code inspired by
+	see http://www.k-wave.org/
+	"""
+	def gaussian_func(x,mean,variance):
+		return np.exp(-((x - mean)**2)/(2*variance))
+
+
+	Ts			 = t[1]-t[0]
+	Fs			 = 1.0/Ts
+	tone_length	 = ( NT/(fc*1.0) )
+	tone_t		 = np.arange(0,tone_length,Ts)
+	tone_burst_t = np.sin(2*pi*fc*tone_t)
+
+	x_lim = 3
+	window_x = np.arange(-x_lim,x_lim, 2.0*x_lim/(np.size(tone_burst_t)-1) )
+	window	 = gaussian_func(window_x,0, 1)
+
+	ind = np.min([ np.size(window_x), np.size(tone_burst_t)])
+	tone_burst=np.zeros((ind,))
+	tone_burst[0:ind] = window[0:ind]*tone_burst_t[0:ind] 
+
+	y	= np.zeros((np.size(t),))
+
+
+	#plt.figure()
+	#plt.plot(tone_burst)
+	#plt.show()
+	try:
+		y[0:np.size(tone_burst)] = Amp*tone_burst[:]
+		return y
+	except:
+		raise Exception("Signal does not fit in the Configured Time, Increase the Simulation Time to solve this issue")
+
+
+
+class Signals():
+	
+	def __init__(self, Name="RaisedCosine", Amplitud=1, Frequency=1, N_Cycles=1):
+		
+		self.Name      = Name
+		self.Amplitude = Amplitud
+		self.Frequency = Frequency
+		self.N_Cycles  = N_Cycles
+	
+	
+	def __str__(self):
+		return "Signal: "  + unicode(self.Name)
+
+	def __repr__(self):
+		return "Signal: " + unicode(self.Name)
+		
+
+	def generate(self, t):
+		if self.Name == "RaisedCosine":
+			return RaisedCosinePulse(t, self.Frequency, self.Amplitude)
+		elif self.Name == "GaussianSine":
+			return PulseUTsin(t,self.Frequency,self.N_Cycles,self.Amplitude)
+		
+	def save(self,t):
+		self.time_signal  = self.generate(t)
+	
+
+
+
+