Recent content by yagmai

1. Two questions about using Poisson process

Dear experts here, I am facing some problem in the following qns. I need some guidance on this qns. In a CSMA based random access system, Poisson process is considered to be a good model for aggregated traffic for a large number of similar users. In such a system, the probability of n terminals...
2. Tasks regarding CSMA and Poisson process

Dear experts here, I am facing some problem in the following qns. I need some guidance on this qns. In a CSMA based random access system, Poisson process is considered to be a good model for aggregated traffic for a large number of similar users. In such a system, the probability of n terminals...
3. Problem with coding error in a cyclic code

Re: Error Coding Up, Any friend can help me with this question? Thanks
4. Problem with coding error in a cyclic code

Hello guys, how to solve this question? For a cylic code, if an error pattern e(x) is detectable. show that its i cyclic shift e^(i) (x) is also detectable. I was thinking this... s(x) = r(x) mod g(x) then look up the syndrome table, to find the error pattern. What puzzled me is, If let...
5. Question on fiber optic communication channel

Re: Communication channels up, any experts here can help? Thanks
6. Question on fiber optic communication channel

Communication channels Any experts in communications/information theory can help me on this? Consider a fiber optic communication channel with cross over probability of 10^-2 and a wireless mobile channel with erasure probability of 10^-2. Calculate the mutual information assuming equiprobable...
7. Why the use of a fixed length code for N equiprobable symbols is efficient ?

Dear guys. I would like to understand more on fixed length code. May I ask why the use of a fixed length code for N equiprobable symbols is as efficient as any code can be? What conditions have to be satisfied by N and codeword length so that the coding efficiency is 100%? Thank you