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Hello all,
What is the purpose of the geometric representation of signals? I mean, in reality, do we send the modulated signal as is, or we send just its projections on the orthonormal functions? I am a little bit confused, and it is highly appreciated if anyone can give useful information...
Hello,
I would like to ask about the AWGN: what is the single-sided PSD? and what is the difference between single-sided PSD and variance? why sometimes we use \[N_0\] and others \[N_0/2\] to describe the statistics of the AWGN?
Thanks in advance
Hello Communications_Engineer,
I am trying to program the simplest case of Amplify-and-Forward (AF) Channel State Information(CSI)-assisted cooperative diversity system, where we have three nodes: the source S, the relay R, and the destination D. The relay node intended to help the...
I come up with this code, but it does not match the theoritcal results which are obtained from another program. Can anyone tell me why?
N=10^6;%Number of symbols
b=rand(1,N)>0.5;%Generate Equiprobable Binary Sequence
s=2*b-1;%Convert to Polar: 1->1 and 0->-1
SNRdB=[0:20];%Signal-to-Noise Ratio...
Thank you very much for replying, but then, we need to specify the data rate and the bandwidth of the channel. How can we know the most appropriate values for these variables? and how will they affect the final result? Can you give me a simple example, please?
Regards
Hello,
Does anyone have a MATLAB code for a cooperative diversity communication system with Amplify-and-Forward relaying technique over independent and identically distributed Rayleigh fading channels, where all the nodes are equipped with single antenna?
Thanks in advance
That would be: Carrier Sense Multiple Access/Collision Detection. It is a technique used in the multiple access networks such in the bus topology where multiple computers share a common channel. Before sending data a signal (carrier) is sensed in the channel, if the channel is busy an...
I think it is clear now the concept of adding AWGN to the transmitted signal over AWGN channel. Let me summarize:
For a specific SNR we need to add a noise term to the transmitted symbol such that the SNR is as specified, i.e.: if the SNR(dB)=15, we need to add a noise term such that the...
Hello,
I am reading some materials on Selection Combining technique, and the derivation of the CDF and PDF of the highest SNR among N i.i.d Rayleigh fading branches was going easy, until I reached the derivation of the average SNR, where it is written that...
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