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Results tagged with digital-communications
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user 57695
Digital Communication is the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel.
1
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1
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How do you model the channel between a satellite(LEO) and a ground station?
If the transmitter is on a satellite in a circular orbit at Low Earth Orbit with a QPSK modulated waveform at 1 megabaud centered at 12 GHz downlinking to the receiver, which is
stationary on the grou …
- 121
2
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optimal RX beamforming
I was asked this question in an interview couple of weeks ago. I think I answered it correctly, but I think I might missing some points. Here is the problem, following by my answer.
Part 1)
In Figure …
- 121
4
votes
1
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Detection problem with extra noise observation. Does the extra observations help with detect...
Assuming all “real” number, consider the detection problem of $x$ given $y_1$ and $y_2$ below
$y_1= x + n_1$
$y_2= n_1 + n_2$
where $x$ is either $+A$ or $-A$ with equal probability, and $n_1$ and $n …
- 121
0
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I/Q scatter plot of raised cosine filter in QPSK
I am using a raised cosine filter in my QPSK receiver and I see this IQ diagram of the signal, but it seems off to me. Can someone explain why this happens?
This is the MATLAB code I used to generate …
- 121