Single-channel blind separation of unsynchronized multiuser PSK signals with non-identical sampling frequency offsets
Single-channel blind source separation (SCBSS) of uncoordinated, non-spread, co-frequency interfering multi-user signals is a challenging task. When the multi-user signals have sampling frequency offset (SFO) due to the imperfection of the local oscillator (LO), this problem becomes even more diffic...
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| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Online Access: | https://hdl.handle.net/10356/164967 |
| _version_ | 1826121269390606336 |
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| author | Liu, Xiaobei Guan, Yong Liang |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Liu, Xiaobei Guan, Yong Liang |
| author_sort | Liu, Xiaobei |
| collection | NTU |
| description | Single-channel blind source separation (SCBSS) of uncoordinated, non-spread, co-frequency interfering multi-user signals is a challenging task. When the multi-user signals have sampling frequency offset (SFO) due to the imperfection of the local oscillator (LO), this problem becomes even more difficult to be solved. In this letter, a select-stitch data-aided channel estimation (CE) initialized per-survivor processing (SS-DCE-PSP) algorithm is proposed for SCBSS of multi-user signals with SFOs caused by imperfect LOs. By dividing a long sequence into a number of segments and selecting the segments with highest detection reliability to stitch together, the time slip and symbol slip due to the non-identical SFOs can be resolved. The data-aided CE in SS-DCE-PSP further enhances the performance of PSP, especially for the initial symbols. Simulation results show that the proposed SS-DCE-PSP algorithm is robust to the normalized SFO up to 10-4, and the BERs obtained by the SS-DCE-PSP algorithm are close (within 0.5dB) to the BERs obtained for multi-user signals without SFOs. |
| first_indexed | 2024-10-01T05:29:35Z |
| format | Journal Article |
| id | ntu-10356/164967 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:29:35Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1649672023-03-09T15:32:28Z Single-channel blind separation of unsynchronized multiuser PSK signals with non-identical sampling frequency offsets Liu, Xiaobei Guan, Yong Liang School of Electrical and Electronic Engineering Temasek Laboratories @ NTU Engineering::Electrical and electronic engineering::Wireless communication systems Single-Channel Blind Source Separation Sampling Frequency Offset Per-Survivor Processing Phase-Shift Keying Single-channel blind source separation (SCBSS) of uncoordinated, non-spread, co-frequency interfering multi-user signals is a challenging task. When the multi-user signals have sampling frequency offset (SFO) due to the imperfection of the local oscillator (LO), this problem becomes even more difficult to be solved. In this letter, a select-stitch data-aided channel estimation (CE) initialized per-survivor processing (SS-DCE-PSP) algorithm is proposed for SCBSS of multi-user signals with SFOs caused by imperfect LOs. By dividing a long sequence into a number of segments and selecting the segments with highest detection reliability to stitch together, the time slip and symbol slip due to the non-identical SFOs can be resolved. The data-aided CE in SS-DCE-PSP further enhances the performance of PSP, especially for the initial symbols. Simulation results show that the proposed SS-DCE-PSP algorithm is robust to the normalized SFO up to 10-4, and the BERs obtained by the SS-DCE-PSP algorithm are close (within 0.5dB) to the BERs obtained for multi-user signals without SFOs. Nanyang Technological University Submitted/Accepted version This work was supported by Temasek Laboratories@NTU Signal Research Programme 3 Grant. 2023-03-06T06:28:15Z 2023-03-06T06:28:15Z 2022 Journal Article Liu, X. & Guan, Y. L. (2022). Single-channel blind separation of unsynchronized multiuser PSK signals with non-identical sampling frequency offsets. IEEE Communications Letters, 26(11), 2774-2778. https://dx.doi.org/10.1109/LCOMM.2022.3202538 1089-7798 https://hdl.handle.net/10356/164967 10.1109/LCOMM.2022.3202538 2-s2.0-85137879010 11 26 2774 2778 en IEEE Communications Letters © 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: https://doi.org/10.1109/LCOMM.2022.3202538. application/pdf |
| spellingShingle | Engineering::Electrical and electronic engineering::Wireless communication systems Single-Channel Blind Source Separation Sampling Frequency Offset Per-Survivor Processing Phase-Shift Keying Liu, Xiaobei Guan, Yong Liang Single-channel blind separation of unsynchronized multiuser PSK signals with non-identical sampling frequency offsets |
| title | Single-channel blind separation of unsynchronized multiuser PSK signals with non-identical sampling frequency offsets |
| title_full | Single-channel blind separation of unsynchronized multiuser PSK signals with non-identical sampling frequency offsets |
| title_fullStr | Single-channel blind separation of unsynchronized multiuser PSK signals with non-identical sampling frequency offsets |
| title_full_unstemmed | Single-channel blind separation of unsynchronized multiuser PSK signals with non-identical sampling frequency offsets |
| title_short | Single-channel blind separation of unsynchronized multiuser PSK signals with non-identical sampling frequency offsets |
| title_sort | single channel blind separation of unsynchronized multiuser psk signals with non identical sampling frequency offsets |
| topic | Engineering::Electrical and electronic engineering::Wireless communication systems Single-Channel Blind Source Separation Sampling Frequency Offset Per-Survivor Processing Phase-Shift Keying |
| url | https://hdl.handle.net/10356/164967 |
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