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

$\endgroup$
  • 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 Sep 18 '19 at 2:02
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, privacy policy and cookie policy

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