Digital Precoders for Partially Spectral Overlapping Subarrays in mmWave Satellite Communications
With the emergence of sixth-generation (6G) wireless services, low Earth orbit (LEO) satellite communications are increasingly recognized as a promising solution for providing extensive wireless coverage to terrestrial users. Subarray-based hybrid beamforming offers an efficient implementation metho...
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IEEE
2024-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10781376/ |
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| author | Feng-Chin Hsiao Meng-Lin Ku Yan-Zhou Song |
| author_facet | Feng-Chin Hsiao Meng-Lin Ku Yan-Zhou Song |
| author_sort | Feng-Chin Hsiao |
| collection | DOAJ |
| description | With the emergence of sixth-generation (6G) wireless services, low Earth orbit (LEO) satellite communications are increasingly recognized as a promising solution for providing extensive wireless coverage to terrestrial users. Subarray-based hybrid beamforming offers an efficient implementation method in millimeter wave (mmWave) communications; however, current approaches that use either non-overlapping or fully overlapping spectrum for subarrays may result in inefficient spectrum usage or severe inter-beam interference. In this paper, we investigate digital precoders for two partially spectral overlapping subarrays of LEO satellites using hybrid beamforming to enhance spectrum utilization while mitigating inter-beam interference. We propose and analyze an interference model for partially spectral overlapping subarrays, which theoretically characterizes the inter-beam interference effect resulting from partial spectrum overlapping in hybrid beamforming. Utilizing an approximated interference model to simplify the analysis, we derive a closed-form expression for a minimum mean square error (MMSE)-based digital precoder, constrained by total transmit power. Extensive computer simulations demonstrate the effectiveness of the proposed MMSE digital precoder in improving the bit error rate (BER), signal-to-interference-plus-noise ratio (SINR), sum rate, and spectrum utilization. |
| format | Article |
| id | doaj-art-786a59d734e448f8a067bfec57b54bc0 |
| institution | DOAJ |
| issn | 2169-3536 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-786a59d734e448f8a067bfec57b54bc02025-08-20T02:49:09ZengIEEEIEEE Access2169-35362024-01-011218726518727710.1109/ACCESS.2024.351295310781376Digital Precoders for Partially Spectral Overlapping Subarrays in mmWave Satellite CommunicationsFeng-Chin Hsiao0https://orcid.org/0009-0009-2683-9780Meng-Lin Ku1https://orcid.org/0000-0002-2777-9355Yan-Zhou Song2https://orcid.org/0009-0004-3997-6964Department of Communication Engineering, National Central University, Zhongli, Taoyuan, TaiwanDepartment of Communication Engineering, National Central University, Zhongli, Taoyuan, TaiwanDepartment of Communication Engineering, National Central University, Zhongli, Taoyuan, TaiwanWith the emergence of sixth-generation (6G) wireless services, low Earth orbit (LEO) satellite communications are increasingly recognized as a promising solution for providing extensive wireless coverage to terrestrial users. Subarray-based hybrid beamforming offers an efficient implementation method in millimeter wave (mmWave) communications; however, current approaches that use either non-overlapping or fully overlapping spectrum for subarrays may result in inefficient spectrum usage or severe inter-beam interference. In this paper, we investigate digital precoders for two partially spectral overlapping subarrays of LEO satellites using hybrid beamforming to enhance spectrum utilization while mitigating inter-beam interference. We propose and analyze an interference model for partially spectral overlapping subarrays, which theoretically characterizes the inter-beam interference effect resulting from partial spectrum overlapping in hybrid beamforming. Utilizing an approximated interference model to simplify the analysis, we derive a closed-form expression for a minimum mean square error (MMSE)-based digital precoder, constrained by total transmit power. Extensive computer simulations demonstrate the effectiveness of the proposed MMSE digital precoder in improving the bit error rate (BER), signal-to-interference-plus-noise ratio (SINR), sum rate, and spectrum utilization.https://ieeexplore.ieee.org/document/10781376/Satellite communicationhybrid beamformingmillimeter wave (mmWave)digital precoderminimum mean square error (MMSE) |
| spellingShingle | Feng-Chin Hsiao Meng-Lin Ku Yan-Zhou Song Digital Precoders for Partially Spectral Overlapping Subarrays in mmWave Satellite Communications IEEE Access Satellite communication hybrid beamforming millimeter wave (mmWave) digital precoder minimum mean square error (MMSE) |
| title | Digital Precoders for Partially Spectral Overlapping Subarrays in mmWave Satellite Communications |
| title_full | Digital Precoders for Partially Spectral Overlapping Subarrays in mmWave Satellite Communications |
| title_fullStr | Digital Precoders for Partially Spectral Overlapping Subarrays in mmWave Satellite Communications |
| title_full_unstemmed | Digital Precoders for Partially Spectral Overlapping Subarrays in mmWave Satellite Communications |
| title_short | Digital Precoders for Partially Spectral Overlapping Subarrays in mmWave Satellite Communications |
| title_sort | digital precoders for partially spectral overlapping subarrays in mmwave satellite communications |
| topic | Satellite communication hybrid beamforming millimeter wave (mmWave) digital precoder minimum mean square error (MMSE) |
| url | https://ieeexplore.ieee.org/document/10781376/ |
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