Optimum Spectral and Energy Efficiency Tradeoff in Two-User Gaussian Interference Channel
Optimum Spectral and Energy Efficiency Tradeoff in Two-User Gaussian Interference Channel
复制标题
二用户高斯干扰信道中的最佳频谱和能量效率权衡
DOI：
10.1109/lwc.2017.2785804
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发表时间：
2018-06-01
影响因子：
6.3
通讯作者：
Fan, Pingzhi
中科院分区：
文献类型：
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作者：
Cai, Donghong;Wu, Jingxian;Fan, Pingzhi
在这封信中，我们研究的频谱效率（SE）和能量效率（EE）之间的最佳折衷的两个用户高斯干扰信道（GIC）。通过研究两条链路之间的相互干扰，得到了两用户GIC可达到的SE-EE折衷区域。SE-EE折衷区域中的每个点对应于两个链路之间的可能调度策略。然后，通过针对给定的总和SE最大化EE来识别最佳SE-EE折衷，其中最大EE被表示为SE的封闭形式函数。结果分析量化了相互干扰对SE-EE权衡的影响。结果表明，最优调度策略取决于两条链路之间的干扰系数和目标SE。
In this letter, we study the optimum tradeoff between the spectral efficiency (SE) and energy efficiency (EE) for the two-user Gaussian interference channel (GIC). The achievable SE-EE tradeoff region of two-user GIC is obtained by studying the interactions between the two links due to their mutual interference. Each point in the SE-EE tradeoff region corresponds to a possible scheduling strategy between the two links. The optimum SE-EE tradeoff is then identified by maximizing the EE for a given sum SE, where the maximum EE is expressed as a closed-form function of the SE. The result analytically quantifies the impact of mutual interference on the SE-EE tradeoff. It is shown that the optimum scheduling strategy depends on the interference coefficients between the two links and the target SE.