Low Complexity Turbo Receiver for LTE Uplink with Transmitter IQ Imbalance

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概要

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• In this paper, we investigate two improved turbo receivers for the Long Term Evolution (LTE) uplink in the presence of transmitter (Tx) in-phase and quadrature-phase imbalance (IQI) with parameters known at eNodeB. For multiuser multiple-input multiple-output (MU-MIMO) single-carrier frequency division multiple access (SC-FDMA) systems, we derive a optimal joint linear minimum mean square error (MMSE) turbo multiuser detector (MUD) based on the mirror symmetry clusters. For the single use SC-FDMA system with Tx IQI, we derive an optimal widely linear MMSE (WLMMSE) turbo equalizer. Both receivers are implemented in the discrete frequency domain and only slightly increase the computational complexity compared to the conventional turbo receivers. Monte Carlo simulations show that the proposed receivers significantly outperform the conventional turbo receivers. The simulation results are then confirmed by the extrinsic information transfer (EXIT) chart analysis.

著者

• Ding Lv

  National Mobile Communication Research Laboratory Southeast University

• LIU Rui

  National Mobile Communication Research Laboratory, Southeast University

• Gao Xi

  National Mobile Communication Research Laboratory Southeast University

• Liu Rui

  National Mobile Communication Research Laboratory Southeast University

関連論文

• Feedback Bandwidth Allocation for Users under Different Types of Channels in Multi-Antenna Systems
• New Performance Results for Optimum Combining in Presence of Arbitrary-Power Interferers and Thermal Noise
• Low Complexity Turbo Receiver for LTE Uplink with Transmitter IQ Imbalance
• Low Complexity Turbo Receiver for LTE Uplink with Transmitter IQ Imbalance

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