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

作者：Liu, Ximei; Qiao, Deli^*

来源：IEEE Wireless Communications Letters, 2019, 8(1): 241-244.

DOI：10.1109/LWC.2018.2868636

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

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.

• 出版日期2019-2
• 单位华东师范大学