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首页> 外文期刊>Communications, IEEE Transactions on >Opportunistic Interference Mitigation Achieves Optimal Degrees-of-Freedom in Wireless Multi-Cell Uplink Networks
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Opportunistic Interference Mitigation Achieves Optimal Degrees-of-Freedom in Wireless Multi-Cell Uplink Networks

机译:机会主义干扰缓解技术在无线多小区上行链路网络中实现了最佳的自由度

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摘要

We introduce an opportunistic interference mitigation (OIM) protocol, where a user scheduling strategy is utilized in K-cell uplink networks with time-invariant channel coefficients and base stations (BSs) having M antennas. Each BS opportunistically selects a set of users who generate the minimum interference to the other BSs. Two OIM protocols are shown according to the number of simultaneously transmitting users per cell, S: opportunistic interference nulling (OIN) and opportunistic interference alignment (OIA). Then, their performance is analyzed in terms of degrees-of-freedom (DoFs). As our main result, it is shown that KM DoFs are achievable under the OIN protocol with M selected users per cell, if the total number of users in a cell, N, scales at least as SNR^{(K-1)M}. Similarly, it turns out that the OIA scheme with S(
机译:我们引入机会干扰减轻(OIM)协议,其中在具有时不变信道系数的K小区上行链路网络和具有M根天线的基站(BS)中使用用户调度策略。每个BS机会性地选择一组对其他BS产生最小干扰的用户。根据每个小区同时发送用户的数量,S显示了两种OIM协议:机会干扰置零(OIN)和机会干扰对齐(OIA)。然后,根据自由度(DoF)分析其性能。作为我们的主要结果,结果表明,如果一个小区中的用户总数N至少缩放为SNR ^ {((K-1)M},则在OIN协议下,每个小区M个选定用户可以达到KM DoF。 。类似地,事实证明,如果N的缩放速度快于SNR ^ {(K-1)S},则具有S(

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