I'm currently looking at capacity for cascaded channels as part of my Communications Systems module and we're looking at a question in which we have four identical channels represented by the conditional probability function given in a matrix:

p(y|x) =

|0.9 0.06 0.04|

|0.04 0.9 0.06|

|0.06 0.9 0.04|

Then another channel:

q(y|x) =

|0.98 0.01 0.01|

|0.01 0.98 0.01|

|0.01 0.98 0.01|

As far as I could tell the capacity didn't change whether q was in position 1 in the cascade or position 5 in the cascade. I also tried some different matrices that didn't resemble the identity matrix so much and again I found position didn't matter and I was wondering why this is?


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.