Space-Time Block Coding-Based Beamforming for Beam Squint Compensation

被引：50

作者：

Liu, Ximei ^{[1
]}

Qiao, Deli ^{[1
,2
]}

机构：

[1] East China Normal Univ, Sch Informat Sci & Technol, Shanghai 200241, Peoples R China

[2] East China Normal Univ, Shanghai Key Lab Multidimens Informat Proc, Shanghai 200241, Peoples R China

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2019年 / 8卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Millimeter wave; beamforming; space-time block coding; beam squint; throughput;

D O I：

10.1109/LWC.2018.2868636

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this letter, the beam squint problem, which causes significant variations in radiated beam gain over frequencies in a millimeter wave communication system, is investigated. A constant modulus beamformer design, which is formulated to maximize the expected average beam gain within the bandwidth with limited variation over frequencies within the bandwidth, is proposed. A semidefinite relaxation method is developed to solve the optimization problem under the constant modulus constraints. Depending on the eigenvalues of the optimal solution, either direct beamforming or transmit diversity-based beamforming is employed for data transmissions. Through numerical results, the proposed transmission scheme can compensate for beam squint effectively and improve system throughput. Overall, a transmission scheme for beam squint compensation in wide-band wireless communication systems is provided.

引用

页码：241 / 244

页数：4

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