Neyman-Pearson Codebook Design for Beam Alignment in Millimeter-Wave Networks
Neyman-Pearson Codebook Design for Beam Alignment in Millimeter-Wave Networks
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毫米波网络中光束对准的 Neyman-Pearson 码本设计
DOI：
10.1145/3130242.3130247
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Michelusi, Nicolo
中科院分区：
文献类型：
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作者：
Hussain, Muddassar;Love, David J.;Michelusi, Nicolo
毫米波系统需要窄波束通信来实现高吞吐量。为此，波束对准是通过适当的波束侦听协议来实现的，该协议指定如何在每个天线阵元(码字)处分配幅度和相位，以通过适当的波束指向来感测移动用户的位置。然而，光束缺陷--例如旁瓣的存在--和噪声可能会在检测过程中引起误差。因此，可能无法实现发送器和接收器之间的正确对准。因此，设计传感码本以获得最佳的检测性能是非常重要的。本文提出了一种Neyman-Pearson码本设计方法。在虚警、功率和混合波束形成约束下，优化感知码字，使误检率最小。由于问题的复杂性，进行了最坏情况的放松。结果表明，对偶问题可以转化为半定规划，最优码本是加权阵列响应矩阵的主特征向量。数值结果表明，该算法的性能优于现有的算法，检测性能提高了33%。
Millimeter wave systems require narrow beam communication to achieve high throughput. To this end, beam alignment is achieved via a proper beam sensing protocol, which specifies how to allocate amplitude and phase at each antenna array element (a codeword) to sense the mobile user's position, through appropriate beam pointing. However, beam imperfections -- such as the presence of side-lobes -- and noise may cause errors in the detection process. Thus, correct alignment between transmitter and receiver may not be achieved. Therefore, it is of great importance to design the sensing codebook to attain optimal detection performance. In this paper, a Neyman-Pearson codebook design is proposed. The sensing codeword is optimized so as to minimize the mis-detection probability, under false-alarm, power and hybrid beamforming constraints. Due to the intractability of the problem, a worst-case relaxation is carried out. It is shown that the dual problem can be recast as a semidefinite program, and the optimal codebook is the principle eigenvector of a weighted array response matrix. It is shown numerically that the proposed design outperforms a state-of-the art algorithm, with improvement of up to 33% in detection performance.