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2008

Multi-layer broadcasting hybrid-ARQ strategies for block fading channels

13 years 3 months ago
Multi-layer broadcasting hybrid-ARQ strategies for block fading channels
Conventional hybrid automatic retransmission request (HARQ) is usually used to maximize throughput. However, high throughput is achieved at the expense of high latency. We study a novel broadcasting HARQ strategy. The multi-layer broadcast approach is suitable for the case where transmitter has no channel state information (CSI), which is the case with HARQ schemes as well. The broadcast approach enables the receiver to decode rates, which are matched to every fading gain realization. That is, the higher the fading gain realization, the more layers are reliably decoded. The broadcast approach combined with HARQ enables achieving high throughput with low latency. In a broadcast HARQ scheme every code layer supports HARQ independently. Thus HARQ is applied in every transmission block to undecoded layers only, which highly increases the broadcast approach efficiency. In this paper, both broadcast chase combining (BCC) HARQ and broadcast incremental redundancy (BIR) HARQ are studied in th...
Avi Steiner, Shlomo Shamai
Added 16 Dec 2010
Updated 16 Dec 2010
Type Journal
Year 2008
Where TWC
Authors Avi Steiner, Shlomo Shamai
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