Time-varying channel estimation in reconfigurable intelligent surface assisted communication system
Aiming at the key problems need to be solved, such as cascade channel sparse representation, time-varying channel parameter tracking and signal reconstruction, for time-varying cascade channels estimation of reconfigurable intelligent surface (RIS) assisted communication system, a Khatri-Rao and hie...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2024-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2024028/ |
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| _version_ | 1841540020225179648 |
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| author | Kai SHAO Ben LU Guangyu WANG |
| author_facet | Kai SHAO Ben LU Guangyu WANG |
| author_sort | Kai SHAO |
| collection | DOAJ |
| description | Aiming at the key problems need to be solved, such as cascade channel sparse representation, time-varying channel parameter tracking and signal reconstruction, for time-varying cascade channels estimation of reconfigurable intelligent surface (RIS) assisted communication system, a Khatri-Rao and hierarchical Bayesian Kalman filter (KR-HBKF) algorithm was proposed.Firstly, the Khatri-Rao product and Kronecker product transformations were used to obtain the sparse representation of RIS cascaded channels based on the sparse characteristics of channels, thus the RIS cascaded channel estimation problem was transformed into a low-dimensional sparse signal recovery problem.Then, according to the state evolution model of RIS cascaded channel, the time correlation parameter was introduced into the prediction model of HBKF algorithm, and the improved HBKF was applied to solve the problem of time-varying channel parameter tracking and signal reconstruction for completing the time-varying cascaded channels estimation.The sparsity and time correlation of the channel were comprehensively considered in the KR-HBKF algorithm, thus better estimation accuracy could be obtained with small pilot overhead.Compared with the traditional compressed sensing algorithm, the simulation results show that the proposed algorithm has about 5 dB estimated performance improvement, and better robustness performance under different time-varying channel conditions. |
| format | Article |
| id | doaj-art-1c6a75de1a0446c39acf9af4d7f8ede3 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2024-01-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-1c6a75de1a0446c39acf9af4d7f8ede32025-01-14T06:22:39ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2024-01-014511912859385230Time-varying channel estimation in reconfigurable intelligent surface assisted communication systemKai SHAOBen LUGuangyu WANGAiming at the key problems need to be solved, such as cascade channel sparse representation, time-varying channel parameter tracking and signal reconstruction, for time-varying cascade channels estimation of reconfigurable intelligent surface (RIS) assisted communication system, a Khatri-Rao and hierarchical Bayesian Kalman filter (KR-HBKF) algorithm was proposed.Firstly, the Khatri-Rao product and Kronecker product transformations were used to obtain the sparse representation of RIS cascaded channels based on the sparse characteristics of channels, thus the RIS cascaded channel estimation problem was transformed into a low-dimensional sparse signal recovery problem.Then, according to the state evolution model of RIS cascaded channel, the time correlation parameter was introduced into the prediction model of HBKF algorithm, and the improved HBKF was applied to solve the problem of time-varying channel parameter tracking and signal reconstruction for completing the time-varying cascaded channels estimation.The sparsity and time correlation of the channel were comprehensively considered in the KR-HBKF algorithm, thus better estimation accuracy could be obtained with small pilot overhead.Compared with the traditional compressed sensing algorithm, the simulation results show that the proposed algorithm has about 5 dB estimated performance improvement, and better robustness performance under different time-varying channel conditions.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2024028/reconfigurable intelligent surfacechannel estimationBayesian compressed sensingKalman filter |
| spellingShingle | Kai SHAO Ben LU Guangyu WANG Time-varying channel estimation in reconfigurable intelligent surface assisted communication system Tongxin xuebao reconfigurable intelligent surface channel estimation Bayesian compressed sensing Kalman filter |
| title | Time-varying channel estimation in reconfigurable intelligent surface assisted communication system |
| title_full | Time-varying channel estimation in reconfigurable intelligent surface assisted communication system |
| title_fullStr | Time-varying channel estimation in reconfigurable intelligent surface assisted communication system |
| title_full_unstemmed | Time-varying channel estimation in reconfigurable intelligent surface assisted communication system |
| title_short | Time-varying channel estimation in reconfigurable intelligent surface assisted communication system |
| title_sort | time varying channel estimation in reconfigurable intelligent surface assisted communication system |
| topic | reconfigurable intelligent surface channel estimation Bayesian compressed sensing Kalman filter |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2024028/ |
| work_keys_str_mv | AT kaishao timevaryingchannelestimationinreconfigurableintelligentsurfaceassistedcommunicationsystem AT benlu timevaryingchannelestimationinreconfigurableintelligentsurfaceassistedcommunicationsystem AT guangyuwang timevaryingchannelestimationinreconfigurableintelligentsurfaceassistedcommunicationsystem |