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首页> 外文期刊>Wireless Communications Letters, IEEE >Benefits of Improper Signaling for Underlay Cognitive Radio
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Benefits of Improper Signaling for Underlay Cognitive Radio

机译：底层认知无线电信号不正确的好处

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摘要

In this letter we study the potential benefits of improper signaling for a secondary user (SU) in underlay cognitive radio networks. We consider a basic yet illustrative scenario in which the primary user (PU) always transmit proper Gaussian signals and has a minimum rate constraint. After parameterizing the SU transmit signal in terms of its power and circularity coefficient (which measures the degree of impropriety), we prove that the SU improves its rate by transmitting improper signals only when the ratio of the squared modulus between the SU–PU interference link and the SU direct link exceeds a given threshold. As a by-product of this analysis, we obtain the optimal circularity coefficient that must be used by the SU depending on its power budget. Some simulation results show that the SU benefits from the transmission of improper signals especially when the PU is not highly loaded.
机译：在这封信中，我们研究了底层认知无线电网络中次用户（SU）信令不当的潜在好处。我们考虑一个基本但说明性的场景，其中主要用户（PU）始终发送适当的高斯信号，并具有最小速率限制。在根据SU发射信号的功率和圆度系数（衡量不当程度）进行参数化后，我们证明SU仅通过在SU–PU干扰链路之间的模数平方比的情况下，通过发射不正确的信号来提高其速率。 SU直接链路超过给定阈值。作为此分析的副产品，我们根据SU的功率预算获得了SU必须使用的最佳圆形系数。一些仿真结果表明，SU受益于不正确信号的传输，尤其是在PU负载不高的情况下。

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