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On Noncoherent Fading Relay Channels at High Signal-to-Noise Ratio

机译：高信噪比的非相干衰落中继信道

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摘要

The capacity of noncoherent regular-fading relay channels is studied where all terminals are aware of the fading statistics but not of their realizations. It is shown that if the fading coefficient of the channel between the transmitter and the receiver can be predicted more accurately from its infinite past than the fading coefficient of the channel between the relay and the receiver, then at high signal-to-noise ratio (SNR), the relay does not increase capacity. It is further shown that if the fading coefficient of the channel between the transmitter and the relay can be predicted more accurately from its infinite past than the fading coefficient of the channel between the relay and the receiver, then at high SNR, one can achieve communication rates that are within one bit of the capacity of the multiple-input single-output fading channel that results when the transmitter and the relay can cooperate.
机译：研究了非相干常规衰落中继信道的容量，其中所有终端都知道衰落统计信息，但不了解其实现。结果表明，如果从发射机和接收机之间的信道的衰落系数可以比其在中继站和接收机之间的信道的衰落系数更准确地从无限远的过去进行预测，那么在高信噪比下（ SNR），则中继不会增加容量。进一步表明，如果从发射机和中继站之间的信道的衰落系数比中继站和接收机之间的信道的衰落系数可以更精确地从发射机和中继站之间的衰落系数进行预测，那么在高信噪比的情况下，可以实现通信当发射器和中继器可以配合使用时，其速率在多输入单输出衰落信道容量的一比特之内。

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