Improved Phase Noise Compensation in OFDM Systems
Phase noise (PN) consists of common phase error (CPE) and inter carrier interference (ICI). In an OFDM symbol, CPE has the same impact on each subcarrier, which is easy to be suppressed. However, ICI destroys the orthogonality of subcarriers, which is difficult to be eliminated. Therefore, an additi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Spolecnost pro radioelektronicke inzenyrstvi
2022-12-01
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| Series: | Radioengineering |
| Subjects: | |
| Online Access: | https://www.radioeng.cz/fulltexts/2022/22_04_0510_0519.pdf |
| _version_ | 1797987484562358272 |
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| author | L. Ge Z. Wang L. Qian P. Wei F. Gao M. Li |
| author_facet | L. Ge Z. Wang L. Qian P. Wei F. Gao M. Li |
| author_sort | L. Ge |
| collection | DOAJ |
| description | Phase noise (PN) consists of common phase error (CPE) and inter carrier interference (ICI). In an OFDM symbol, CPE has the same impact on each subcarrier, which is easy to be suppressed. However, ICI destroys the orthogonality of subcarriers, which is difficult to be eliminated. Therefore, an additional method is needed to be performed in the OFDM receiver to compensate the ICI. The interpolation method is considered an effective way to eliminate the ICI caused by PN in the OFDM system. To enhance the accuracy of the PN estimation and compensation, we propose a linear method, LI-ICI-EE1 method based on LI-ICI-E1. Multiple interpolation slopes are first calculated by selecting multiple pairs of observation samples, then the slope with the maximal linear fitting degree based on the least square (LS) criterion is selected to improve the LI precision. Furthermore, to improve the estimation accuracy of PN in the LI-ICI-EE1, we propose a Shrinkage-based on LI-ICI-E1 method named SLI-EE1, which is implemented by adding an l2 norm penalty term to the error function. At last, to optimize the low accuracy of LI-ICI-EE1 and SLI-EE1 when the PN compensation problem is a high-order problem, we propose a non-linear method Shrinkage-based Third-order Lagrange method named STL. Simulation results show that the improved methods have better BER performance. |
| first_indexed | 2024-04-11T07:49:11Z |
| format | Article |
| id | doaj.art-29505014b9414433bfd9fe499bf9c1e5 |
| institution | Directory Open Access Journal |
| issn | 1210-2512 |
| language | English |
| last_indexed | 2024-04-11T07:49:11Z |
| publishDate | 2022-12-01 |
| publisher | Spolecnost pro radioelektronicke inzenyrstvi |
| record_format | Article |
| series | Radioengineering |
| spelling | doaj.art-29505014b9414433bfd9fe499bf9c1e52022-12-22T04:36:09ZengSpolecnost pro radioelektronicke inzenyrstviRadioengineering1210-25122022-12-01314510519Improved Phase Noise Compensation in OFDM SystemsL. GeZ. WangL. QianP. WeiF. GaoM. LiPhase noise (PN) consists of common phase error (CPE) and inter carrier interference (ICI). In an OFDM symbol, CPE has the same impact on each subcarrier, which is easy to be suppressed. However, ICI destroys the orthogonality of subcarriers, which is difficult to be eliminated. Therefore, an additional method is needed to be performed in the OFDM receiver to compensate the ICI. The interpolation method is considered an effective way to eliminate the ICI caused by PN in the OFDM system. To enhance the accuracy of the PN estimation and compensation, we propose a linear method, LI-ICI-EE1 method based on LI-ICI-E1. Multiple interpolation slopes are first calculated by selecting multiple pairs of observation samples, then the slope with the maximal linear fitting degree based on the least square (LS) criterion is selected to improve the LI precision. Furthermore, to improve the estimation accuracy of PN in the LI-ICI-EE1, we propose a Shrinkage-based on LI-ICI-E1 method named SLI-EE1, which is implemented by adding an l2 norm penalty term to the error function. At last, to optimize the low accuracy of LI-ICI-EE1 and SLI-EE1 when the PN compensation problem is a high-order problem, we propose a non-linear method Shrinkage-based Third-order Lagrange method named STL. Simulation results show that the improved methods have better BER performance.https://www.radioeng.cz/fulltexts/2022/22_04_0510_0519.pdfchannel estimationphase noiseorthogonal frequency division multiplexingshrinkage techniquethird-order lagrange method |
| spellingShingle | L. Ge Z. Wang L. Qian P. Wei F. Gao M. Li Improved Phase Noise Compensation in OFDM Systems Radioengineering channel estimation phase noise orthogonal frequency division multiplexing shrinkage technique third-order lagrange method |
| title | Improved Phase Noise Compensation in OFDM Systems |
| title_full | Improved Phase Noise Compensation in OFDM Systems |
| title_fullStr | Improved Phase Noise Compensation in OFDM Systems |
| title_full_unstemmed | Improved Phase Noise Compensation in OFDM Systems |
| title_short | Improved Phase Noise Compensation in OFDM Systems |
| title_sort | improved phase noise compensation in ofdm systems |
| topic | channel estimation phase noise orthogonal frequency division multiplexing shrinkage technique third-order lagrange method |
| url | https://www.radioeng.cz/fulltexts/2022/22_04_0510_0519.pdf |
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