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Optical TTD compensation network-based phase precoding for THz massive MIMO systems
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DOI：10.1364/OE.519426.png)
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In sixth generation (6G) communications, terahertz (THz) communication is one of the most important technologies in the future due to its ultra -bandwidth, where hybrid beamforming has been widely used to solve the severe transmission attenuation in the THz band. However, the use of frequency -flat phase shifters in hybrid beamforming leads to the beam split effect. To solve the beam split influence, we propose a novel optical true time delay compensation network (OTTDCN)-based phase precoding structure with low power consumption. In the proposed scheme, the OTTDCN pre -generates multiple beam compensation modes to achieve phase compensation for different frequencies. As a result, the compensated beams can be reoriented toward the target direction at different frequencies. Moreover, a low -complexity beam compensation mode -based hybrid precoding algorithm is proposed, where the selection of the optimal beam compensation modes used for all radio -frequency (RF) chains with finite beam compensation modes is considered. The results show that the OTTDCN-based phase precoding scheme can effectively alleviate the beam split effect with low power consumption and achieve near -optimal performance. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Keyword:
WIRELESS COMMUNICATIONS
DELAY
FIBER
CHALLENGES
期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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