Channel estimation method for MIMO-OFDM systems based on pilots and modified Kalman filter
A combined channel estimation method of time-frequency-selective fading channels in MIMO-OFDM systems was proposed.The time-varying channel was modeled as an autoregressive（AR） process and a low-dimensional Kalman filter based on pilots was used to estimate the AR parameters,and the LS（least square）...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2007-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74661114/ |
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| _version_ | 1841537398752673792 |
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| author | SONG Tie-cheng YOU Xiao-hu SHEN Lian-feng SONG Xiao-jin |
| author_facet | SONG Tie-cheng YOU Xiao-hu SHEN Lian-feng SONG Xiao-jin |
| author_sort | SONG Tie-cheng |
| collection | DOAJ |
| description | A combined channel estimation method of time-frequency-selective fading channels in MIMO-OFDM systems was proposed.The time-varying channel was modeled as an autoregressive（AR） process and a low-dimensional Kalman filter based on pilots was used to estimate the AR parameters,and the LS（least square） algorithm was adopted to track the time-varying channel fading factors.The Kalman estimator explored the time-domain correlation of the channel,and a minimum mean square error（MMSE） combiner was used to modify the Kalman estimates.The proposed solution could reduce the complexity of the high-dimensional Kalman filter and track the channel both in frequency and time domains.The simulation results show that this method improves the LS estimates and has a comparable performance to the com-plex high-dimensional Kalman channel estimation method. |
| format | Article |
| id | doaj-art-969f986395fe41ad9cd84e10b9b420e6 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2007-01-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-969f986395fe41ad9cd84e10b9b420e62025-01-14T08:36:49ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2007-01-01232874661114Channel estimation method for MIMO-OFDM systems based on pilots and modified Kalman filterSONG Tie-chengYOU Xiao-huSHEN Lian-fengSONG Xiao-jinA combined channel estimation method of time-frequency-selective fading channels in MIMO-OFDM systems was proposed.The time-varying channel was modeled as an autoregressive（AR） process and a low-dimensional Kalman filter based on pilots was used to estimate the AR parameters,and the LS（least square） algorithm was adopted to track the time-varying channel fading factors.The Kalman estimator explored the time-domain correlation of the channel,and a minimum mean square error（MMSE） combiner was used to modify the Kalman estimates.The proposed solution could reduce the complexity of the high-dimensional Kalman filter and track the channel both in frequency and time domains.The simulation results show that this method improves the LS estimates and has a comparable performance to the com-plex high-dimensional Kalman channel estimation method.http://www.joconline.com.cn/zh/article/74661114/MIMO-OFDMchannel estimateKalmanleast squareMMSE combiner |
| spellingShingle | SONG Tie-cheng YOU Xiao-hu SHEN Lian-feng SONG Xiao-jin Channel estimation method for MIMO-OFDM systems based on pilots and modified Kalman filter Tongxin xuebao MIMO-OFDM channel estimate Kalman least square MMSE combiner |
| title | Channel estimation method for MIMO-OFDM systems based on pilots and modified Kalman filter |
| title_full | Channel estimation method for MIMO-OFDM systems based on pilots and modified Kalman filter |
| title_fullStr | Channel estimation method for MIMO-OFDM systems based on pilots and modified Kalman filter |
| title_full_unstemmed | Channel estimation method for MIMO-OFDM systems based on pilots and modified Kalman filter |
| title_short | Channel estimation method for MIMO-OFDM systems based on pilots and modified Kalman filter |
| title_sort | channel estimation method for mimo ofdm systems based on pilots and modified kalman filter |
| topic | MIMO-OFDM channel estimate Kalman least square MMSE combiner |
| url | http://www.joconline.com.cn/zh/article/74661114/ |
| work_keys_str_mv | AT songtiecheng channelestimationmethodformimoofdmsystemsbasedonpilotsandmodifiedkalmanfilter AT youxiaohu channelestimationmethodformimoofdmsystemsbasedonpilotsandmodifiedkalmanfilter AT shenlianfeng channelestimationmethodformimoofdmsystemsbasedonpilotsandmodifiedkalmanfilter AT songxiaojin channelestimationmethodformimoofdmsystemsbasedonpilotsandmodifiedkalmanfilter |