File:Raised-cosine-ISI.svg
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Original file (SVG file, nominally 590 × 328 pixels, file size: 31 KB)
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This is a file from the Wikimedia Commons. The description on its description page there is shown below.
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Summary
| Description |
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)
Licensing
I, 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.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 09:15, 28 March 2015 | 590 × 328 (31 KB) | Chris828 | {{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... |
File usage
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