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Channel Estimation Techniques in LTE for Downlink


Affiliations
1 Department of Electrical and Computer Engineering, Ethiopian Institute of Technology-Mekelle (EiT-M), Mekelle University, Mekelle, Ethiopia
     

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Multiuser and multi-antenna techniques are considered key to the latest mobile communication technology, which is termed as Long Term Evolution (LTE), to achieve peak user data rates. These techniques demand a precise measurement of the channel state. This study presents a review of channel estimation techniques put forward for LTE-downlink. Performance and implementation complexity of different pilot-assisted schemes such as Minimum Mean Square Error (MMSE), Least Square (LS) based channel estimation methods will be discussed in detail. Furthermore, semi-blind algorithms which make use of the data symbols in addition to the pilot tones are also presented.

Keywords

Channel Estimation, LTE, MU-MIMO, LS, LMMSE.
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  • Channel Estimation Techniques in LTE for Downlink

Abstract Views: 140  |  PDF Views: 1

Authors

Sinshaw Bekele
Department of Electrical and Computer Engineering, Ethiopian Institute of Technology-Mekelle (EiT-M), Mekelle University, Mekelle, Ethiopia
Dilip Mali
Department of Electrical and Computer Engineering, Ethiopian Institute of Technology-Mekelle (EiT-M), Mekelle University, Mekelle, Ethiopia

Abstract


Multiuser and multi-antenna techniques are considered key to the latest mobile communication technology, which is termed as Long Term Evolution (LTE), to achieve peak user data rates. These techniques demand a precise measurement of the channel state. This study presents a review of channel estimation techniques put forward for LTE-downlink. Performance and implementation complexity of different pilot-assisted schemes such as Minimum Mean Square Error (MMSE), Least Square (LS) based channel estimation methods will be discussed in detail. Furthermore, semi-blind algorithms which make use of the data symbols in addition to the pilot tones are also presented.

Keywords


Channel Estimation, LTE, MU-MIMO, LS, LMMSE.