A New Semi-Blind Method for Spatial Equalization in MIMO Systems

作者：Yang Liu^*; Zhang Hang; Cai Yang; Su Qiao

来源：IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, 2018, E101A(10): 1693-1697.

DOI：10.1587/transfun.E101.A.1693

• l(1)-norm cost function
• multi-input-multi-output (MIMO) systems
• semi-blind
• spatial equalization

In this letter, a new semi-blind approach incorporating the bounded nature of communication sources with the distance between the equalizer outputs and the training sequence is proposed. By utilizing the sparsity property of l(1)-norm cost function, the proposed algorithm can outperform the semi-blind method based on higher-order statistics (HOS) criterion especially for transmitting sources with non-constant modulus. Experimental results demonstrate that the proposed method shows superior performance over the HOS based semi-blind method and the classical training-based method for QPSK and 16QAM sources equalization. While for 64QAM signal inputs, the proposed algorithm exhibits its superiority in low signal-to-noise-ratio (SNR) conditions compared with the training-based method.

• 出版日期2018-10