0
$\begingroup$

I am aware that negative frequencies do not normally count towards the bandwidth when transmitting in the baseband. However when specifically asked to look at the null-to-null or zero-crossing bandwidth, should the negative frequencies count? For example, in the sinc plot below, is the bandwidth 1 or 2?

sinc plot

Improve this question
$\endgroup$
1
  • 1
    $\begingroup$ It's a matter of convention. I'd say the bandwidth is 1 in this case. Null-to-null is often used with bandpass signals or channels, where it makes more sense since the two nulls of interest are positive. $\endgroup$
    – MBaz
    Commented Sep 18, 2019 at 2:02

1 Answer 1

Reset to default
1
$\begingroup$

It is null-null when the signal is bandpass and zero-null when the signal is baseband. So you will always take the positive frequencies.

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.