TY - JOUR
T1 - Hybrid Precoding and Combining for Millimeter Wave/Sub-THz MIMO-OFDM Systems with Beam Squint Effects
AU - Wan, Qian
AU - Fang, Jun
AU - Chen, Zhi
AU - Li, Hongbin
N1 - Publisher Copyright:
© 1967-2012 IEEE.
PY - 2021/8
Y1 - 2021/8
N2 - In this paper, we consider the problem of hybrid precoding and combining for wideband millimeter wave (mmWave) and sub-terahertz (THz) MIMO-OFDM systems with beam squint effects. In the presence of the beam squint effect, the conventional spatially sparse precoding-based hybrid precoding method which approximates the optimal precoder/combiner with a set of array response vectors suffers severe performance degradation. To address this difficulty, we propose a new set of basis vectors to approximate the optimal precoder/combiner. Each new basis vector is devised to form a radiation pattern with a wide beam to cover the squinted beam directions caused by different frequencies. Simulation results show that the proposed method can effectively alleviate the beam squint effect and achieve a substantial performance improvement over the existing state-of-the-art hybrid precoding method.
AB - In this paper, we consider the problem of hybrid precoding and combining for wideband millimeter wave (mmWave) and sub-terahertz (THz) MIMO-OFDM systems with beam squint effects. In the presence of the beam squint effect, the conventional spatially sparse precoding-based hybrid precoding method which approximates the optimal precoder/combiner with a set of array response vectors suffers severe performance degradation. To address this difficulty, we propose a new set of basis vectors to approximate the optimal precoder/combiner. Each new basis vector is devised to form a radiation pattern with a wide beam to cover the squinted beam directions caused by different frequencies. Simulation results show that the proposed method can effectively alleviate the beam squint effect and achieve a substantial performance improvement over the existing state-of-the-art hybrid precoding method.
KW - Millimeter wave
KW - beam squint effect
KW - hybrid precoding and combining
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U2 - 10.1109/TVT.2021.3093095
DO - 10.1109/TVT.2021.3093095
M3 - Article
AN - SCOPUS:85112218738
SN - 0018-9545
VL - 70
SP - 8314
EP - 8319
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 8
M1 - 9468411
ER -