| Autor: |
Lingxiao Xia, Chandra Nair |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
ISIT |
| DOI: |
10.1109/isit.2012.6284213 |
| Popis: |
In this paper we show that superposition coding is not optimal for three-receiver more capable channels. The optimality of superposition coding region has been open for k-receiver (k ≥ 3) more capable broadcast channel. The main contribution is in identifying a counterexample to demonstrate that superposition coding is sub-optimal. We also compute the capacity region for the counter example. On the other hand, we show that the sum-capacity for a k-receiver more capable broadcast channel is obtained by transmitting all the information to the most capable receiver. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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