0
$\begingroup$

i have a question that might seem silly. For a given space time code, say a constellation of 16 unitary matrices. When using the union bound to derive an upper bound on the average error probability (using the equation in the image below)

Union bound on PEP

is it logical to have the Bit Error Rate result higher than 1 for a given SNR? even if what i am deriving is an upper bound ?

Thank you

Improve this question
$\endgroup$
1
$\begingroup$

The union bound can indeed result in a BER higher than 1. As you say, it is just an upper bound, and it becomes tighter as the SNR increases. For low SNR, the union bound can be quite loose.

Improve this answer
$\endgroup$
1
  • $\begingroup$ thank you for your answer, it was a big help! $\endgroup$
    – Ibrahim DAWI
    Sep 11 '19 at 16:12

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.