下行多用户MIMO传输系统中鲁棒性连续MMSE预编码方案

doi:10.3969/j.issn.1001-2400.2011.01.011

Abstract

Abstract:

A robust successive MMSE (SMMSE) precoding scheme is proposed in the context of the multiple user multiple input multiple output (MU-MIMO) downlink (DL) transmission system under the condition of imperfect channel state information (CSI) at the transmitter side. The proposed algorithm enables us to use multiple antennas at the receiving terminal so that it is possible to jointly process the received signal at the receiving terminial, with the eigen-beamforming technique belonging to the joint processing method. Simulation results show that the robust SMMSE algorithm aided eigen-beamforing technique can effectively improve the system performance compared to the one without considering the impact of the channel estimation error, and even completely remove the error floor.

Key words: MIMO, multiuser, successive MMSE, precoding, robust

LI Chuan;LIU Wei;LI Xiaoya;ZHOU Lihua. Robust successive MMSE precoding for the MU-MIMO downlink transmission system[J].J4, 2011, 38(1): 66-70.

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Robust successive MMSE precoding for the MU-MIMO downlink transmission system

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