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3 votes

Bits - symbols mapping in M-PAM beginner question

$2^k$-ary PAM maps $k$ bits (which can be expressed as integers in the range $[0, 2^k-1]$ to $2^k$ levels that are equally-spaced and symmetric about $0$. ($0$ is NOT one of the levels).. The levels ...
Dilip Sarwate's user avatar
2 votes

Es/N0 with roll-off

Following the comments by AlexTP (thank you), there is one clear mistake in my reasoning. Using a roll-off factor indeed increases the bandwith but it colours noise too. The mistake is $P_n = W'N_0$ ...
MaLog's user avatar
  • 41
1 vote

Es/N0 calculation on received symbols

Generally: Here, you need to be better at explicitly writing down your channel-, noise and signal models! Being clear in your head about this answers such questions pretty easily. There's no "...
Marcus Müller's user avatar
1 vote

Energy per symbol calculation

The first equation, $ \frac{1}{N_s}\sum |x[n]|^2 $, is correct. Applying the RRC filter kind of smears the energy of the symbol over several samples so that when you add them all back up again you get ...
Engineer's user avatar
  • 3,032

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