
Programmer's Corner Discussion forum for all aspects of programming and software engineering. Any software programming language welcome: C, C++, C#, Fortran, Java, Matlab, etc. 

Thread Tools  Display Modes 
#1




Design signal in Matlab
__________________
Signature Links Deleted. 
#2




Let's say you have a signal which is amplitude modulated. As you know, to take that signal to baseband from passband, you need to use another local oscillator. Which means that you have four replicas of your own unmodulated signal. Two of them is added at the origin and you have 3 figures. The amplitude of the origin part is twice larger than the other two parts. Here is our job to recover exactly the message signal. You need to choose a proper amplitude.
As you know, it is very difficult to create a low pass filter characteristics, especially in high frequency applications. "Raised Cosine Filter" is very useful and commonly used in practice. As a result, the low pass filter that is used to demodulate the modulated signal is very important. If the conditions are not satisfied, some parts of the modulated signal(i.e., information) may be lost. If you're interested, you may google the definition of "Raised Cosine Filter". Regards 
#3




This has been moved from  http://forum.allaboutcircuits.com/sh...ad.php?t=23107
Please do not hijack existing threads.
__________________
First comes the hardware, then the software. 
Tags 
design, matlab, signal 
Related Site Pages  
Section  Title  
Worksheet  Active filters  
Worksheet  Signal modulation  
Worksheet  Passive filter circuits  
Worksheet  Mixedfrequency signals  
Textbook  Resonant filters : Filters  
Textbook  Bandstop filters : Filters  
Textbook  Bandpass filters : Filters  
Textbook  Highpass filters : Filters  
Textbook  Lowpass filters : Filters  
Textbook  What is a filter? : Filters 
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
matlab help , Digital signal processing  dina  Programmer's Corner  40  03232009 07:21 PM 
Useful Matlab Information  Dave  Programmer's Corner  7  11092008 05:51 AM 
DTMF signal through an electricity 220V 50Hz  kirill2008  The Projects Forum  11  09242008 02:51 AM 
MATLAB  Digital Signal Processing  lamerooze  Programmer's Corner  0  03132008 06:08 PM 
MATLAB, retrieve voice signal corrupted by awgn?  makyboy  Programmer's Corner  3  05252007 10:14 PM 
Thread Tools  
Display Modes  

