File:Raised-cosine-ISI.svg
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Summary
editDescriptionRaised-cosine-ISI.svg |
English: Consecutive raised-cosine impulses, demonstrating zero-ISI property.
Deutsch: Intersysmbolinterferenzfreiheit bei der Impulsformung mit Raised-Cosine |
Date | |
Source | modified python script from user Krishnavedala for creating plot |
Author | Chris828 |
Created using python and matplotlib library.
from numpy import *
from matplotlib.pyplot import *
from mpl_toolkits.axes_grid.axislines import SubplotZero
def makeT(lim=1): # Make the X-axis
result = linspace(-lim,lim,500)
return result
def sinc(x): # define normlized sinc function
return sin(pi*x)/(pi*x)
def raisedCos(x,B=0,T=1): # define raised cosine function
return sinc(x/T) * cos(pi*B*x/T) / (1 - (4*B*B*x*x/(T*T)) )
fig = figure(figsize=(8,4))
ax = SubplotZero(fig,111)
fig.add_subplot(ax)
ax.grid(True)
ax.set_xticks([-3,-2,-1,0,1,2,3])
ax.set_xticklabels(["-3T","-2T","-T","0","T","2T","3T"])
ax.set_ylim((-.2,1.))
ax.set_yticklabels([])
for direction in ["xzero","yzero"]:
ax.axis[direction].set_axisline_style("->")
ax.axis[direction].set_visible(True)
for direction in ["left","right","bottom","top"]:
ax.axis[direction].set_visible(False)
t = makeT(4)
ax.plot(t,raisedCos(t+2),'b')
ax.plot(t,raisedCos(t+1),'b')
ax.plot(t,raisedCos(t),'b')
ax.plot(t,raisedCos(t-2),'b')
ax.plot(t,raisedCos(t-1),'b')
ax.text(4.,-.1,r"$t$")
ax.text(.2,1.01,r"$h(t)$")
#fig.show()
fig.savefig("Raised-cosine-ISI.svg",bbox_inches="tight",\
pad_inches=.15)
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editI, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 17:15, 28 March 2015 | 590 × 328 (31 KB) | Chris828 (talk | contribs) | {{Information |Description ={{en|1=Consecutive raised-cosine impulses, demonstrating zero-ISI property.}} {{de|1=Intersysmbolinterferenzfreiheit bei der Impulsformung mit Raised-Cosine}} |Source =modified python script from user [[User:Krish... |
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Height | 262pt |