On Channel Output Feedback in Deterministic Interference Channels
IEEE Information Theory Workshop (ITW), Taormina, İtalya, 11 - 16 Ekim 2009, ss.298-302, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Doi Numarası: 10.1109/itw.2009.5351427
- Basıldığı Şehir: Taormina
- Basıldığı Ülke: İtalya
- Sayfa Sayıları: ss.298-302
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
In this paper, we study the effect of channel output feedback on the sum capacity in a two-user symmetric deterministic interference channel. We find that having a single feedback link from one of the receivers to its own transmitter results in the same sum capacity as having a total of 4 feedback links from both the receivers to both the transmitters. Hence, from the sum capacity point of view, the three additional feedback links are not helpful. We also consider a half-duplex feedback model, where the forward and the feedback resources are symmetric and time-shared. Surprisingly, we find that there is no gain in sum-capacity with feedback in a half-duplex feedback model, when interference links have more capacity than direct links.