Channel estimation for multiple-input multiple-output orthogonal chirp-division multiplexing systems
In multiple-input multiple-output (MIMO) systems, channel estimation is of crucial importance to guarantee reliable recovery of ultra-high-speed MIMO signals. This paper proposes a novel channel estimation algorithm for the emerging MIMO-based orthogonal chirp-division multiplexing (OCDM) systems by...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Online Access: | https://hdl.handle.net/10356/174574 |
| _version_ | 1811686319268560896 |
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| author | Ouyang, Xing Dobre, Octavia A. Guan, Yong Liang Townsend, Paul |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Ouyang, Xing Dobre, Octavia A. Guan, Yong Liang Townsend, Paul |
| author_sort | Ouyang, Xing |
| collection | NTU |
| description | In multiple-input multiple-output (MIMO) systems, channel estimation is of crucial importance to guarantee reliable recovery of ultra-high-speed MIMO signals. This paper proposes a novel channel estimation algorithm for the emerging MIMO-based orthogonal chirp-division multiplexing (OCDM) systems by utilizing the unique features of OCDM signals. In the proposed algorithm, a set of pilot signals is designed based on the Fresnel basis, which is essentially a family of orthogonal linear chirps. The pilots are assigned to different antennas for transmission occupying the same time slot and bandwidth. According to the convolution-preservation theorem of the Fresnel transforms, the transfer matrices of MIMO-OCDM systems can be readily estimated at the receiver without any inter-antenna interference, even if the pilots overlap in both the time and frequency domains. The proposed algorithm avoids bandwidth waste in conventional channel estimators, in which silent pilots will be required in time and/or frequency to ensure the received MIMO pilots separable. We show that the proposed algorithm is unbiased for the unique OCDM pilots and has better estimate accuracy and system performance. Finally, analysis and numerical results are provided to validate its advantages as a promising algorithm for emerging wireless access technology based on MIMO-OCDM. |
| first_indexed | 2024-10-01T04:58:32Z |
| format | Journal Article |
| id | ntu-10356/174574 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:58:32Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1745742024-04-05T15:41:25Z Channel estimation for multiple-input multiple-output orthogonal chirp-division multiplexing systems Ouyang, Xing Dobre, Octavia A. Guan, Yong Liang Townsend, Paul School of Electrical and Electronic Engineering Engineering Channel estimation Orthogonal chirp-division multiplexing In multiple-input multiple-output (MIMO) systems, channel estimation is of crucial importance to guarantee reliable recovery of ultra-high-speed MIMO signals. This paper proposes a novel channel estimation algorithm for the emerging MIMO-based orthogonal chirp-division multiplexing (OCDM) systems by utilizing the unique features of OCDM signals. In the proposed algorithm, a set of pilot signals is designed based on the Fresnel basis, which is essentially a family of orthogonal linear chirps. The pilots are assigned to different antennas for transmission occupying the same time slot and bandwidth. According to the convolution-preservation theorem of the Fresnel transforms, the transfer matrices of MIMO-OCDM systems can be readily estimated at the receiver without any inter-antenna interference, even if the pilots overlap in both the time and frequency domains. The proposed algorithm avoids bandwidth waste in conventional channel estimators, in which silent pilots will be required in time and/or frequency to ensure the received MIMO pilots separable. We show that the proposed algorithm is unbiased for the unique OCDM pilots and has better estimate accuracy and system performance. Finally, analysis and numerical results are provided to validate its advantages as a promising algorithm for emerging wireless access technology based on MIMO-OCDM. Published version This work was supported in part by the Irish Research Council (IRC) under Grant GOIPD/2021/875 and Grant IRCLA/2022/3636, in part by the Science Foundation Ireland (SFI) under Grant SFI-12/RC/2276_P2_IPIC, and in part by the Enterprise Ireland (EI) under Grant CF-2021-1678-P. The work of Octavia A. Dobre was supported in part by the Natural Sciences and Engineering Research Council of Canada (NSERC) through its Discovery Program. 2024-04-03T01:03:39Z 2024-04-03T01:03:39Z 2024 Journal Article Ouyang, X., Dobre, O. A., Guan, Y. L. & Townsend, P. (2024). Channel estimation for multiple-input multiple-output orthogonal chirp-division multiplexing systems. IEEE Transactions On Wireless Communications, 23(1), 436-449. https://dx.doi.org/10.1109/TWC.2023.3278173 1536-1276 https://hdl.handle.net/10356/174574 10.1109/TWC.2023.3278173 2-s2.0-85161033125 1 23 436 449 en IEEE Transactions on Wireless Communications © 2023 The Authors. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/ application/pdf |
| spellingShingle | Engineering Channel estimation Orthogonal chirp-division multiplexing Ouyang, Xing Dobre, Octavia A. Guan, Yong Liang Townsend, Paul Channel estimation for multiple-input multiple-output orthogonal chirp-division multiplexing systems |
| title | Channel estimation for multiple-input multiple-output orthogonal chirp-division multiplexing systems |
| title_full | Channel estimation for multiple-input multiple-output orthogonal chirp-division multiplexing systems |
| title_fullStr | Channel estimation for multiple-input multiple-output orthogonal chirp-division multiplexing systems |
| title_full_unstemmed | Channel estimation for multiple-input multiple-output orthogonal chirp-division multiplexing systems |
| title_short | Channel estimation for multiple-input multiple-output orthogonal chirp-division multiplexing systems |
| title_sort | channel estimation for multiple input multiple output orthogonal chirp division multiplexing systems |
| topic | Engineering Channel estimation Orthogonal chirp-division multiplexing |
| url | https://hdl.handle.net/10356/174574 |
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