11 Threads found on edaboard.com: Frequency Demodulation Code
Single Side Band (SSB) modulation by phase shift method and synchronous demodulation with phase and frequency deviations (offset errors).
Software Problems, Hints and Reviews :: 03-19-2014 13:37 :: yvikas10 :: Replies: 3 :: Views: 608
I have written a matlab code for fsk using bandpass filter but I m not getting correct code is as follows:
threshold = 0.5;
Tb = 1; % Bit duration
fc = 3/Tb; % Carrier frequency
t1=linspace(0, 1, no_of_samples);
Digital communication :: 01-25-2012 00:36 :: Shruti01 :: Replies: 0 :: Views: 1714
what is cpfsk
fsk frequency shift kaying
Digital communication :: 01-09-2012 03:39 :: shahbaz.ele :: Replies: 1 :: Views: 2039
i have made this after all by myself ... some help from some respectful source....
here it is ...
%Single SideBand Modulation
%By Naveed Ahmad Chughtai
N = 1024;
fs = 2048;
ts = 1/fs;
%t = (0:ts:1);
fc = 600; %Carrier frequency !! Limit fc<800 to avoid freqdomain aliasing
fm1 = 200;
Em1 = 1;
m = Em1*cos(2*pi*fm1*t);
Digital communication :: 12-10-2011 05:54 :: chughtai134 :: Replies: 1 :: Views: 8197
Hello everyone!!! I have a problem. I would like to perform phase demodulation using PLL. I have some matlab code that do that in the case of FM. Here is the code:
%This m-file demonstrates a PLL which tracks and demodulates an FM carrier.
RF, Microwave, Antennas and Optics :: 11-02-2011 07:11 :: FFFPLL :: Replies: 0 :: Views: 923
Hi, I have a matlab code here
it acquires FM modulated signal from sound card can perform FM demodulation
however, i don't why it set vcok (VCO K constant) at 0.176
anyone can explain to me how and why it is set to 0.176?
Fc = 2144; %select VCO carrier frequency
vcok = 0.176; %select vco constant
Fs = 40000; %select sound (...)
Digital communication :: 09-06-2009 09:47 :: yiyi87 :: Replies: 0 :: Views: 4135
i need matlab code for filter in fm demodulation.
the basic problem is dat i could find codes but nowhere they were using the modulated signal foer filteration. they just took the specifications as sampling rate and cutoff frequency etc. but as is the case we have to pass the I and Q componens of the signal through the (...)
Microcontrollers :: 05-29-2009 01:25 :: fishurpocket :: Replies: 0 :: Views: 1366
please can any one help me by providing matlab code for frequency demodualtion using phase locked loop
Digital Signal Processing :: 01-28-2008 07:22 :: santosh_vjit :: Replies: 7 :: Views: 5718
this type of code is hard to find, because the code generally is proprietary.
Does any one have a working Verilog code/ algorithm for envelope detection, phase discriminator and/or frequency discriminator? I already have a working code for demodulation of ASK and FSK but i dont think (...)
PLD, SPLD, GAL, CPLD, FPGA Design :: 06-14-2007 09:25 :: funster :: Replies: 2 :: Views: 2890
i have simulated a code in matlab for the demodulation of ofdm signal (dab). In the synchronisation process, i found the clock offset of 13.035 khz in the spectrum after downconversion. i used a nco to remove the frequency offset. Now when i differentially decode the symbols, i get 5th and 6th symbols (...)
Digital Signal Processing :: 05-12-2006 03:45 :: shameem :: Replies: 0 :: Views: 1726
I tested your signal, it had a small bug.
sampling frequency to symbol rate ratio must be integer. e.g. if you want to keep sampling frequency in 8000 you can specify 8000/6 = 1333 or 8000/5 = 1600 to symbol rate.
Hope these helps.
Digital Signal Processing :: 08-15-2005 09:43 :: mahdithdn :: Replies: 2 :: Views: 3479