0
\$\begingroup\$

What is the exact relation between symbol duration and frequency spacing?

You may know in WiFi6, about 11ax band, there are more sub-carriers compared to WiFi5 because of using shorter frequency spacing, but also uses a longer symbol duration. I guess there is some relation between them.

\$\endgroup\$

1 Answer 1

Reset to default
1
\$\begingroup\$

Subcarrier spacing is equal to the reciprocal of the symbol time.

Equalizing narrower channels flattens group delay error and improves noise margin at the expense of added DSP processing.

\$\endgroup\$
6
  • \$\begingroup\$ Thank you for your answer. you mean that added DSP processing needs more time to process, and it extends the symbol time? \$\endgroup\$
    – ssabassaba
    Jul 30, 2021 at 18:51
  • \$\begingroup\$ It does everything \$\endgroup\$
    – Tony Stewart EE75
    Jul 30, 2021 at 20:01
  • \$\begingroup\$ What do you mean everything? \$\endgroup\$
    – ssabassaba
    Aug 1, 2021 at 5:39
  • \$\begingroup\$ More processing does not cause extended symbol time, it is caused by narrower BW \$\endgroup\$
    – Tony Stewart EE75
    Aug 1, 2021 at 10:09
  • \$\begingroup\$ Thank you! my point is how are those two parameters reciprocal? \$\endgroup\$
    – ssabassaba
    Aug 1, 2021 at 12:34

Your Answer

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

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