New Channel Estimation Algorithm for Non-Sample-Spaced Channels in Fast Time-Varying OFDM System
In fast time-varying OFDM（orthogonal frequency division multiplexing）system, in order to lessen the effects of the CIR（channel impulse response）leakage and ICI（inter-carrier interference）, a new channel estimation algorithm was proposed, which was adapted to non-sample-spaced channels. The algorithm...
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| Format: | Article |
| Language: | zho |
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Beijing Xintong Media Co., Ltd
2015-09-01
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| Series: | Dianxin kexue |
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| Online Access: | http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2015223/ |
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| author | 刘顺兰 汪佳丽 |
| author_facet | 刘顺兰 汪佳丽 |
| author_sort | 刘顺兰 |
| collection | DOAJ |
| description | In fast time-varying OFDM（orthogonal frequency division multiplexing）system, in order to lessen the effects of the CIR（channel impulse response）leakage and ICI（inter-carrier interference）, a new channel estimation algorithm was proposed, which was adapted to non-sample-spaced channels. The algorithm combined complex exponential basis expansion model and the feedback of DFT（discrete fourier transform）, which was built according to the fraction taps channel approximation.The channel parameters were firstly estimated with the complex exponential basis expansion model based on the fraction taps channel approximation.Then the ICI in fast time-varying OFDM system could be calculated according to the estimated channel parameters. Then the feedback was obtained by the elimination of ICI, and noises could be eliminated by DFT. The algorithm could suppress the CIR leakage, eliminate ICI and noises and effectively approximate the actual channels. The simulation results show that the bit error rate and channel mean square error of the proposed algorithm are both effectively improved. |
| format | Article |
| id | doaj-art-e2db2a7e27b04e2b917e28e3c241eea8 |
| institution | Kabale University |
| issn | 1000-0801 |
| language | zho |
| publishDate | 2015-09-01 |
| publisher | Beijing Xintong Media Co., Ltd |
| record_format | Article |
| series | Dianxin kexue |
| spelling | doaj-art-e2db2a7e27b04e2b917e28e3c241eea82025-01-15T03:16:39ZzhoBeijing Xintong Media Co., LtdDianxin kexue1000-08012015-09-013111211759613709New Channel Estimation Algorithm for Non-Sample-Spaced Channels in Fast Time-Varying OFDM System刘顺兰汪佳丽In fast time-varying OFDM（orthogonal frequency division multiplexing）system, in order to lessen the effects of the CIR（channel impulse response）leakage and ICI（inter-carrier interference）, a new channel estimation algorithm was proposed, which was adapted to non-sample-spaced channels. The algorithm combined complex exponential basis expansion model and the feedback of DFT（discrete fourier transform）, which was built according to the fraction taps channel approximation.The channel parameters were firstly estimated with the complex exponential basis expansion model based on the fraction taps channel approximation.Then the ICI in fast time-varying OFDM system could be calculated according to the estimated channel parameters. Then the feedback was obtained by the elimination of ICI, and noises could be eliminated by DFT. The algorithm could suppress the CIR leakage, eliminate ICI and noises and effectively approximate the actual channels. The simulation results show that the bit error rate and channel mean square error of the proposed algorithm are both effectively improved.http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2015223/non-sample-spaced channelfast time-varyingOFDMchannel estimationbasis expansion modelfraction taps channel approximationDFT |
| spellingShingle | 刘顺兰 汪佳丽 New Channel Estimation Algorithm for Non-Sample-Spaced Channels in Fast Time-Varying OFDM System Dianxin kexue non-sample-spaced channel fast time-varying OFDM channel estimation basis expansion model fraction taps channel approximation DFT |
| title | New Channel Estimation Algorithm for Non-Sample-Spaced Channels in Fast Time-Varying OFDM System |
| title_full | New Channel Estimation Algorithm for Non-Sample-Spaced Channels in Fast Time-Varying OFDM System |
| title_fullStr | New Channel Estimation Algorithm for Non-Sample-Spaced Channels in Fast Time-Varying OFDM System |
| title_full_unstemmed | New Channel Estimation Algorithm for Non-Sample-Spaced Channels in Fast Time-Varying OFDM System |
| title_short | New Channel Estimation Algorithm for Non-Sample-Spaced Channels in Fast Time-Varying OFDM System |
| title_sort | new channel estimation algorithm for non sample spaced channels in fast time varying ofdm system |
| topic | non-sample-spaced channel fast time-varying OFDM channel estimation basis expansion model fraction taps channel approximation DFT |
| url | http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2015223/ |
| work_keys_str_mv | AT liúshùnlán newchannelestimationalgorithmfornonsamplespacedchannelsinfasttimevaryingofdmsystem AT wāngjiālì newchannelestimationalgorithmfornonsamplespacedchannelsinfasttimevaryingofdmsystem |