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D_MMSE-FE Equalization Algorithm for LTE Up Link System

Wang Lianyo

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Abstract

A new decision feedback equalizer algorithm which is called Double MMSE Feedback Equalizer and D-MMSE-FE for short was presented to improve the ability of linear equalizer and avoid the high complexity of the traditional decision feedback equalizer. The new algorithm analyses the result of linear MMSE equalizer first and obtains the front and back transfer functions according to the minimum mean square error criterion. A link circuit is employed to improve the ability of equalizer. The new Equalizer is put into use in the TDD LTE uplink SIMO 1 × 2 receiver as an example,and simulated in the common channels in 3GPP protocol. The results show that the new equalizer improves equalization performance by up to 2 d B compared with the linear equalizer.

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What this paper is about

A new decision feedback equalizer algorithm which is called Double MMSE Feedback Equalizer and D-MMSE-FE for short was presented to improve the ability of linear equalizer and avoid the high complexity of the traditional decision feedback equalizer. The new algorithm analyses the result of linear MMSE equalizer first and obtains the front and back transfer functions according to the minimum mean square error criterion. A link circuit is employed to improve the ability of equalizer. The new Equalizer is put into use in the TDD LTE uplink SIMO 1 × 2 receiver as an example,and simulated in the common channels in 3GPP protocol. The results show that the new equalizer improves equalization performance by up to 2 d B compared with the linear equalizer.

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Available abstract

A new decision feedback equalizer algorithm which is called Double MMSE Feedback Equalizer and D-MMSE-FE for short was presented to improve the ability of linear equalizer and avoid the high complexity of the traditional decision feedback equalizer. The new algorithm analyses the result of linear MMSE equalizer first and obtains the front and back transfer functions according to the minimum mean square error criterion. A link circuit is employed to improve the ability of equalizer. The new Equalizer is put into use in the TDD LTE uplink SIMO 1 × 2 receiver as an example,and simulated in the common channels in 3GPP protocol. The results show that the new equalizer improves equalization performance by up to 2 d B compared with the linear equalizer.

Key concepts: Equalizer, Equalization (audio), Adaptive equalizer, Telecommunications link, Minimum mean square error, Computer science, Algorithm, Turbo equalizer

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