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Impact of local delayed CSIT on the capacity region of the two-user interference channel

机译：本地延迟CSIT对两用户干扰信道容量区域的影响

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摘要

The coherence time of a wireless channel is often smaller than the delay with which channel state information is available at transmitters. In this paper, we aim to find the most important subset of the channel state information that transmitters need to learn with delay. We characterize the capacity region of the two-user interference channel with local delayed channel state information at transmitters. We propose a transmission strategy that only relies on the delayed knowledge of the outgoing links at each transmitter and achieves the outer-bound for the scenario in which transmitters learn the entire channel state with delay. We also show that the delayed knowledge of the outgoing links is the minimum delayed knowledge that is required to outperform the no knowledge assumption.
机译：无线信道的相干时间通常小于在发射机处可获得信道状态信息的延迟。在本文中，我们旨在找到发射机需要延迟学习的信道状态信息的最重要子集。我们用发射机处的本地延迟信道状态信息来表征两用户干扰信道的容量区域。我们提出一种传输策略，该策略仅依赖于每个发射器的出局链路的延迟知识，并为发射器延迟学习整个信道状态的情况实现了外边界。我们还显示出站链接的延迟知识是胜过无知识假设所需的最小延迟知识。

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