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Hi,
I'm Electronic Engineer with 5 years of experience at the fields of DSP, FPGA and board design.
Contact me if you need any help with your project, including Matlab simulations, VHDL/Verilog codding and simulation,
designing and modeling of communication systems, image processing.
Shlomy.
I was trying to implement your suggestions in 8PSK demodulation and here is what I got:
clc;
clear all;
close all;
M=16;
k=log2(M);
Nbits=100*k; %Number of bits to transmit
Rb=1e3;
Fc=2e3;
i=sqrt(-1);
msg=randint(1,Nbits,[0 1]);
% Transmitter...
Yes This disscation is realy helpful, I have a question about your code
one of the outputs of your function is the time vector, if I want to modulate the bits I understand that first I need to create the complex envalop from the NRZ bits and then multiply the complex envalop by...
10^-0.3 ~= 0.5
so we got almost the same BER
0.5 is the worst case for BER, and the meaning of it is that there is no way at all to recover the signal.
I also tryed deferent channels of matlab and all of them yealds the same BER.
I even tryed:
delayVector = 0
gainVector = 1 % or higher...
That exactly what I did but for some reason I do not get the proper BER values,
I tryed to change all the parameters, ts, Rsym, Modulation methhod, BER range, gain vector, all the parameters and I allways get a graph of BER which is far from the theory.
If you can, please kindly look at my...
Hey all
Does anyone knows how to model a Digital modulation suppose QPSK or 16QAM with multipath propagation?
I need to create this kind of communication system, and plot it's BER.
and then I need to simulate the same system with higher Bit Rate and to see how the BER changes.
I'ts not what I was meaning mate,
What I meant is how in matlab code can I define the bitrate?
while using modem objects in matlab or using Aya's code there is no consideration of the symbol rate or bitrate.
Thanks Mathuranathan you helped me understand how to define the band width of a filter.
but how do I define the bit rate W?
which kind of parameter is will change the W?
Hey guys
for too long I'm working on my final project simulation, and as the deadlines coming I'm willing to pay for someone how can write a simulation code for me
It must be in matlab (Simulink is not allowed)
I need to write an implementation of gsm in matlab which will contain:
multipath...
That's a good question, I don't know how to set a band width for the signal.
I think that the pulse shaping filter suppose to limit the band width of the signal...
in our case it seems that the carrier is at 20khz and sampling frequency is 50khz
and according to the matlab help : Fs > 2(Fc + BW)
Hey guys,
It took me a while to remmember why in first place I multiplayed by exp..
because exp(i*x) = cos(x) + i*sin(x)
and that how I thought I can build the Inphase and Quadrature componets.
anyway Aya's algorithem is much more helpful for my project then mine.
But in the following...
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