Channel Estimation in DCT-Based OFDM
This paper derives the channel estimation of a discrete cosine transform- (DCT-) based orthogonal frequency-division multiplexing (OFDM) system over a frequency-selective multipath fading channel. Channel estimation has been proved to improve system throughput and performance by allowing for coheren...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/813429 |
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| _version_ | 1832561760634142720 |
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| author | Yulin Wang Gengxin Zhang Zhidong Xie Jing Hu |
| author_facet | Yulin Wang Gengxin Zhang Zhidong Xie Jing Hu |
| author_sort | Yulin Wang |
| collection | DOAJ |
| description | This paper derives the channel estimation of a discrete cosine transform- (DCT-) based orthogonal frequency-division multiplexing (OFDM) system over a frequency-selective multipath fading channel. Channel estimation has been proved to improve system throughput and performance by allowing for coherent demodulation. Pilot-aided methods are traditionally used to learn the channel response. Least square (LS) and mean square error estimators (MMSE) are investigated. We also study a compressed sensing (CS) based channel estimation, which takes the sparse property of wireless channel into account. Simulation results have shown that the CS based channel estimation is expected to have better performance than LS. However MMSE can achieve optimal performance because of prior knowledge of the channel statistic. |
| format | Article |
| id | doaj-art-3b8a08aa5d1246e9927d714ff110888a |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-3b8a08aa5d1246e9927d714ff110888a2025-02-03T01:24:19ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/813429813429Channel Estimation in DCT-Based OFDMYulin Wang0Gengxin Zhang1Zhidong Xie2Jing Hu3Institute of Communication Engineering, PLA University of Science and Technology, Yudao Street 14, Nanjing 210007, ChinaInstitute of Communication Engineering, PLA University of Science and Technology, Yudao Street 14, Nanjing 210007, ChinaInstitute of Communication Engineering, PLA University of Science and Technology, Yudao Street 14, Nanjing 210007, ChinaInstitute of Communication Engineering, PLA University of Science and Technology, Yudao Street 14, Nanjing 210007, ChinaThis paper derives the channel estimation of a discrete cosine transform- (DCT-) based orthogonal frequency-division multiplexing (OFDM) system over a frequency-selective multipath fading channel. Channel estimation has been proved to improve system throughput and performance by allowing for coherent demodulation. Pilot-aided methods are traditionally used to learn the channel response. Least square (LS) and mean square error estimators (MMSE) are investigated. We also study a compressed sensing (CS) based channel estimation, which takes the sparse property of wireless channel into account. Simulation results have shown that the CS based channel estimation is expected to have better performance than LS. However MMSE can achieve optimal performance because of prior knowledge of the channel statistic.http://dx.doi.org/10.1155/2014/813429 |
| spellingShingle | Yulin Wang Gengxin Zhang Zhidong Xie Jing Hu Channel Estimation in DCT-Based OFDM The Scientific World Journal |
| title | Channel Estimation in DCT-Based OFDM |
| title_full | Channel Estimation in DCT-Based OFDM |
| title_fullStr | Channel Estimation in DCT-Based OFDM |
| title_full_unstemmed | Channel Estimation in DCT-Based OFDM |
| title_short | Channel Estimation in DCT-Based OFDM |
| title_sort | channel estimation in dct based ofdm |
| url | http://dx.doi.org/10.1155/2014/813429 |
| work_keys_str_mv | AT yulinwang channelestimationindctbasedofdm AT gengxinzhang channelestimationindctbasedofdm AT zhidongxie channelestimationindctbasedofdm AT jinghu channelestimationindctbasedofdm |