MIMO Frequency Selective Channels with Multiple Frequency Offsets: Estimation and Detection Techniques
(2005) In IEE Proceedings - Communications 152(4). p.489-494- Abstract
- Channel gains and frequency offsets are estimated in a multiple input and multiple output (MIMO) scenario, allowing for more than one path between the transmit and the receive antennas, with each path possibly having a different frequency offset. Such a scenario may arise due to Doppler shift associated with various multipaths. Here, the general case is examined and an approximate maximum likelihood (AML) estimator is derived by exploiting the correlation property of the pilot signal. The AM L estimator can be written as the sum of n(T)L one-dimensional maximisations, where n(T) is the number of transmit antennas and L is the total number of paths. The proposed estimator is validated by comparing the results with the Cramer-Rao lower bound... (More)
- Channel gains and frequency offsets are estimated in a multiple input and multiple output (MIMO) scenario, allowing for more than one path between the transmit and the receive antennas, with each path possibly having a different frequency offset. Such a scenario may arise due to Doppler shift associated with various multipaths. Here, the general case is examined and an approximate maximum likelihood (AML) estimator is derived by exploiting the correlation property of the pilot signal. The AM L estimator can be written as the sum of n(T)L one-dimensional maximisations, where n(T) is the number of transmit antennas and L is the total number of paths. The proposed estimator is validated by comparing the results with the Cramer-Rao lower bound (CRLB). Further, a minimum mean square error recursive (MMSER) equaliser is proposed for the considered scenario. Finally, the performance of the MMSER equaliser is compared with the equaliser not accounting for frequency offsets. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1216112
- author
- Ahmed, Sajid ; Lambotharan, Sangarapillai ; Jakobsson, Andreas LU and Chambers, Jonathon
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- PARAMETER-ESTIMATION, FADING CHANNELS
- in
- IEE Proceedings - Communications
- volume
- 152
- issue
- 4
- pages
- 489 - 494
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- scopus:24144487128
- ISSN
- 1350-2425
- DOI
- 10.1049/ip-com:20045224
- language
- English
- LU publication?
- no
- id
- 0163a1c8-cfe9-4ed5-afec-4b167fd67877 (old id 1216112)
- date added to LUP
- 2016-04-01 15:47:44
- date last changed
- 2022-04-22 17:27:42
@article{0163a1c8-cfe9-4ed5-afec-4b167fd67877, abstract = {{Channel gains and frequency offsets are estimated in a multiple input and multiple output (MIMO) scenario, allowing for more than one path between the transmit and the receive antennas, with each path possibly having a different frequency offset. Such a scenario may arise due to Doppler shift associated with various multipaths. Here, the general case is examined and an approximate maximum likelihood (AML) estimator is derived by exploiting the correlation property of the pilot signal. The AM L estimator can be written as the sum of n(T)L one-dimensional maximisations, where n(T) is the number of transmit antennas and L is the total number of paths. The proposed estimator is validated by comparing the results with the Cramer-Rao lower bound (CRLB). Further, a minimum mean square error recursive (MMSER) equaliser is proposed for the considered scenario. Finally, the performance of the MMSER equaliser is compared with the equaliser not accounting for frequency offsets.}}, author = {{Ahmed, Sajid and Lambotharan, Sangarapillai and Jakobsson, Andreas and Chambers, Jonathon}}, issn = {{1350-2425}}, keywords = {{PARAMETER-ESTIMATION; FADING CHANNELS}}, language = {{eng}}, number = {{4}}, pages = {{489--494}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, series = {{IEE Proceedings - Communications}}, title = {{MIMO Frequency Selective Channels with Multiple Frequency Offsets: Estimation and Detection Techniques}}, url = {{http://dx.doi.org/10.1049/ip-com:20045224}}, doi = {{10.1049/ip-com:20045224}}, volume = {{152}}, year = {{2005}}, }