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

被引：41
|
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
收藏
页码：241 / 244
页数：4
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