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arXiv 1401.7262cs.ITmath.IT
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频谱共享对Fast-Than-Nyquist信令效率的影响

Impact of Spectrum Sharing on the Efficiency of Faster-Than-Nyquist Signaling

Marwa El Hefnawy, Gerhard Kramer

摘要:

提出了在存在来自相邻频带的干扰的情况下用于比奈奎斯特快(FTN)信令的容量计算。结果表明,香农的sinc脉冲最大限度地提高频谱效率的多址信道,其中频谱效率被定义为每赫兹每秒比特的总和速率。使用根升余弦脉冲的比较表明,频谱效率随滚降因子单调下降。在高信噪比下,这些脉冲具有随滚降因子单调增加的附加电容间隙。

英文摘要:

Capacity computations are presented for Faster-Than-Nyquist (FTN) signaling in the presence of interference from neighboring frequency bands. It is shown that Shannon's sinc pulses maximize the spectral efficiency for a multi-access channel, where spectral efficiency is defined as the sum rate in bits per second per Hertz. Comparisons using root raised cosine pulses show that the spectral efficiency decreases monotonically with the roll-off factor. At high signal-to-noise ratio, these pulses have an additive gap to capacity that increases monotonically with the roll-off factor.

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