Time-domain RLS-based channel estimation for MIMO OFDM systems
In this paper, an adaptive channel estimation scheme for MIMO OFDM systems based on time-domain training and recursive least squared (RLS) algorithm is proposed. Time orthogonal as well as simultaneously transmitted training sequences are considered. The channel is assumed to be slowly varying time-...
| Main Authors: | , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
IEEE
2007
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| Online Access: | http://psasir.upm.edu.my/id/eprint/47785/ http://psasir.upm.edu.my/id/eprint/47785/1/Time-domain%20RLS-based%20channel%20estimation%20for%20MIMO%20OFDM%20systems.pdf |
| _version_ | 1848850905015779328 |
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| author | Saeed, Mohammed Abdo Mohd Ali, Borhanuddin Ismail, Mahamod Khatun, Sabira Noordin, Nor Kamariah |
| author_facet | Saeed, Mohammed Abdo Mohd Ali, Borhanuddin Ismail, Mahamod Khatun, Sabira Noordin, Nor Kamariah |
| author_sort | Saeed, Mohammed Abdo |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | In this paper, an adaptive channel estimation scheme for MIMO OFDM systems based on time-domain training and recursive least squared (RLS) algorithm is proposed. Time orthogonal as well as simultaneously transmitted training sequences are considered. The channel is assumed to be slowly varying time-dispersive, i.e., constant during one OFDM symbol but changing from symbol to symbol. Channel estimation is performed in time-domain followed by zero-forcing equalization in the frequency-domain. The computational complexity is significantly reduced by applying the matrix inversion lemma. Simulation results show that the proposed estimator with time orthogonal training sequences has better estimation performance over a range of Doppler spreads compared to the case when the training sequences are simultaneously transmitted from the different transmit antennas. |
| first_indexed | 2025-11-15T10:13:42Z |
| format | Conference or Workshop Item |
| id | upm-47785 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:13:42Z |
| publishDate | 2007 |
| publisher | IEEE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-477852016-07-15T05:24:43Z http://psasir.upm.edu.my/id/eprint/47785/ Time-domain RLS-based channel estimation for MIMO OFDM systems Saeed, Mohammed Abdo Mohd Ali, Borhanuddin Ismail, Mahamod Khatun, Sabira Noordin, Nor Kamariah In this paper, an adaptive channel estimation scheme for MIMO OFDM systems based on time-domain training and recursive least squared (RLS) algorithm is proposed. Time orthogonal as well as simultaneously transmitted training sequences are considered. The channel is assumed to be slowly varying time-dispersive, i.e., constant during one OFDM symbol but changing from symbol to symbol. Channel estimation is performed in time-domain followed by zero-forcing equalization in the frequency-domain. The computational complexity is significantly reduced by applying the matrix inversion lemma. Simulation results show that the proposed estimator with time orthogonal training sequences has better estimation performance over a range of Doppler spreads compared to the case when the training sequences are simultaneously transmitted from the different transmit antennas. IEEE 2007 Conference or Workshop Item PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/47785/1/Time-domain%20RLS-based%20channel%20estimation%20for%20MIMO%20OFDM%20systems.pdf Saeed, Mohammed Abdo and Mohd Ali, Borhanuddin and Ismail, Mahamod and Khatun, Sabira and Noordin, Nor Kamariah (2007) Time-domain RLS-based channel estimation for MIMO OFDM systems. In: IEEE International Conference on Telecommunications and Malaysia International Conference on Communications (ICT-MICC 2007), 14-17 May 2007, Penang, Malaysia. (pp. 520-525). 10.1109/ICTMICC.2007.4448692 |
| spellingShingle | Saeed, Mohammed Abdo Mohd Ali, Borhanuddin Ismail, Mahamod Khatun, Sabira Noordin, Nor Kamariah Time-domain RLS-based channel estimation for MIMO OFDM systems |
| title | Time-domain RLS-based channel estimation for MIMO OFDM systems |
| title_full | Time-domain RLS-based channel estimation for MIMO OFDM systems |
| title_fullStr | Time-domain RLS-based channel estimation for MIMO OFDM systems |
| title_full_unstemmed | Time-domain RLS-based channel estimation for MIMO OFDM systems |
| title_short | Time-domain RLS-based channel estimation for MIMO OFDM systems |
| title_sort | time-domain rls-based channel estimation for mimo ofdm systems |
| url | http://psasir.upm.edu.my/id/eprint/47785/ http://psasir.upm.edu.my/id/eprint/47785/ http://psasir.upm.edu.my/id/eprint/47785/1/Time-domain%20RLS-based%20channel%20estimation%20for%20MIMO%20OFDM%20systems.pdf |