Multi-User Frequency Assignment for Ultra-Reliable mmWave Two-Ray Channels
Multi-User Frequency Assignment for Ultra-Reliable mmWave Two-Ray Channels
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DOI：
10.23919/wiopt56218.2022.9930571
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发表时间：
2022-09
期刊：
影响因子：
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通讯作者：
Karl-Ludwig Besser;Eduard Axel Jorswieck;J. Coon
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文献类型：
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作者：
Karl-Ludwig Besser;Eduard Axel Jorswieck;J. Coon
我们考虑一个多用户双射线地面反射场景，发射器和接收器之间的距离未知。通过为每个用户并行使用两个频率，我们可以减轻可能的破坏性干扰，并确保在发射器上只有非常有限的知识的超可靠性。在这项工作中，我们考虑了在多用户通信系统中为每个接收器分配两个频率以使平均最小接收功率最大化的问题。为了解决这一问题，我们将二次多重背包问题推广到包含异构利润的情况，并提出了求解该问题的算法。与随机频率分配相比，我们在数值模拟中报告了大约6dB的增益。
We consider a multi-user two-ray ground reflection scenario with unknown distances between transmitter and receivers. By using two frequencies per user in parallel, we can mitigate possible destructive interference and ensure ultra-reliability with only very limited knowledge at the transmitter. In this work, we consider the problem of assigning two frequencies to each receiver in a multi-user communication system such that the average minimum receive power is maximized. In order to solve this problem, we introduce a generalization of the quadratic multiple knapsack problem to include heterogeneous profits and develop an algorithm to solve it. Compared to random frequency assignment, we report a gain of around 6dB in numerical simulations.