Broadcast strategies for the fading relay channel
Broadcast strategies for the fading relay channel
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DOI：
10.1109/milcom.2004.1494996
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发表时间：
2004-10
期刊：
影响因子：
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通讯作者：
Melda Yuksel;E. Erkip
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文献类型：
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作者：
Melda Yuksel;E. Erkip
广播策略是一种使可靠解码速率适应实际信道状态的编码技术。如果发射信号由不同衰落电平的叠加信息组成，则可以实现这一点。我们将广播策略应用于衰落中继信道。信源将其信息编码为两个级别，如果信道状态为“坏”，则解码第一个级别，如果信道状态为“好”，则在第一个级别之后解码叠加的信息。这种方法允许在中继站和目的地解码一些部分信息，与放大转发（AF）和修改的解码转发（decode-and-forward，DNF）相比，增加了系统的总体吞吐量，同时导致两个级别的分集。我们还认为，在中继信道上的广播方法也会导致较低的整体失真时，源也被考虑在内。
Broadcast strategy is an encoding technique that enables the reliably decoded rate to adapt to the actual channel state. This can be achieved if the transmitted signal is composed of superimposed information for different fading levels. We apply the broadcast strategy to fading relay channels. The source encodes its information to two levels, the first one is decoded if the channel state is "bad", and, if the channel state is "good", the superimposed information is decoded after the first one. This approach allows the decoding of some partial information at both the relay and the destination, increasing the overall throughput of the system compared to amplify-and-forward (AF) and modified decode-and-forward (MDF), while resulting in two levels of diversity. We also argue that the broadcast approach over the relay channel also results in lower overall distortion when the source is also taken into account.