Time-varying channel estimation in OFDM systems based on multiple symbols BEM
In view of the problem of low frequency spectrum utilization for the time-varying channel estimation in orthogonal frequency division multiplexing(OFDM) systems based on basis expansion model (BEM),a new method based on multiple symbols BEM was proposed.Compared with the conventional method based on...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2017-03-01
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| Series: | Tongxin xuebao |
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| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2017060/ |
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| author | Yong DING Shan OUYANG Yue-lei XIE Jun-zheng JIANG Xiao-mao CHEN |
| author_facet | Yong DING Shan OUYANG Yue-lei XIE Jun-zheng JIANG Xiao-mao CHEN |
| author_sort | Yong DING |
| collection | DOAJ |
| description | In view of the problem of low frequency spectrum utilization for the time-varying channel estimation in orthogonal frequency division multiplexing(OFDM) systems based on basis expansion model (BEM),a new method based on multiple symbols BEM was proposed.Compared with the conventional method based on single symbol,the proposed method reduced the subcarriers for pilots.And by means of the baseline tilting technique,the new method mitigated the Gibbs phenomenon caused by Fourier series expansion.The theoretical analysis reveals that the channel model error is reduced due to the introduction of the baseline tilting technique when the normalized Doppler frequency is no more than <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML"> <mfrac> <mrow> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> <mo>−</mo><mfrac> <mn>1</mn> <mi>M</mi> </mfrac> </mrow> <mrow> <mn>1</mn><mo>+</mo><mfrac> <mrow> <msub> <mi>N</mi> <mi>g</mi> </msub> </mrow> <mi>N</mi> </mfrac> </mrow> </mfrac> <mtext> </mtext></math></inline-formula>.Finally,the numerical simulation shows that compared with conventional methods,the proposed algorithm achieves significant improvement on the estimation error performance and bit error rate (BER) performance under the conditions of the corresponding time-varying channel. |
| format | Article |
| id | doaj-art-e094c5d056b34f51b358a978ce03fc5a |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2017-03-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-e094c5d056b34f51b358a978ce03fc5a2025-01-14T07:11:48ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2017-03-0138455259708342Time-varying channel estimation in OFDM systems based on multiple symbols BEMYong DINGShan OUYANGYue-lei XIEJun-zheng JIANGXiao-mao CHENIn view of the problem of low frequency spectrum utilization for the time-varying channel estimation in orthogonal frequency division multiplexing(OFDM) systems based on basis expansion model (BEM),a new method based on multiple symbols BEM was proposed.Compared with the conventional method based on single symbol,the proposed method reduced the subcarriers for pilots.And by means of the baseline tilting technique,the new method mitigated the Gibbs phenomenon caused by Fourier series expansion.The theoretical analysis reveals that the channel model error is reduced due to the introduction of the baseline tilting technique when the normalized Doppler frequency is no more than <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML"> <mfrac> <mrow> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> <mo>−</mo><mfrac> <mn>1</mn> <mi>M</mi> </mfrac> </mrow> <mrow> <mn>1</mn><mo>+</mo><mfrac> <mrow> <msub> <mi>N</mi> <mi>g</mi> </msub> </mrow> <mi>N</mi> </mfrac> </mrow> </mfrac> <mtext> </mtext></math></inline-formula>.Finally,the numerical simulation shows that compared with conventional methods,the proposed algorithm achieves significant improvement on the estimation error performance and bit error rate (BER) performance under the conditions of the corresponding time-varying channel.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2017060/orthogonal frequency division multiplexingchannel estimationbasis expansion model (BEM)multiple symbol |
| spellingShingle | Yong DING Shan OUYANG Yue-lei XIE Jun-zheng JIANG Xiao-mao CHEN Time-varying channel estimation in OFDM systems based on multiple symbols BEM Tongxin xuebao orthogonal frequency division multiplexing channel estimation basis expansion model (BEM) multiple symbol |
| title | Time-varying channel estimation in OFDM systems based on multiple symbols BEM |
| title_full | Time-varying channel estimation in OFDM systems based on multiple symbols BEM |
| title_fullStr | Time-varying channel estimation in OFDM systems based on multiple symbols BEM |
| title_full_unstemmed | Time-varying channel estimation in OFDM systems based on multiple symbols BEM |
| title_short | Time-varying channel estimation in OFDM systems based on multiple symbols BEM |
| title_sort | time varying channel estimation in ofdm systems based on multiple symbols bem |
| topic | orthogonal frequency division multiplexing channel estimation basis expansion model (BEM) multiple symbol |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2017060/ |
| work_keys_str_mv | AT yongding timevaryingchannelestimationinofdmsystemsbasedonmultiplesymbolsbem AT shanouyang timevaryingchannelestimationinofdmsystemsbasedonmultiplesymbolsbem AT yueleixie timevaryingchannelestimationinofdmsystemsbasedonmultiplesymbolsbem AT junzhengjiang timevaryingchannelestimationinofdmsystemsbasedonmultiplesymbolsbem AT xiaomaochen timevaryingchannelestimationinofdmsystemsbasedonmultiplesymbolsbem |