吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (6): 2062-2068.doi: 10.13229/j.cnki.jdxbgxb201506047

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Low complexity frequency domain iterative equalization based on minimum mean square error for single carrier systems

ZOU Qi-feng, TAN Xue-zhi, LIU Mei, MA Lin   

  1. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150080,China
  • Received:2014-02-27 Online:2015-11-01 Published:2015-11-01

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Abstract: In Single Carrier Frequency Domain Equalization (SC-FDE) system, a novel equalization algorithm based on Mean Square Error (MSE) criterion was proposed in order to predigest the complexity of Iterative Block Decision Feedback Equalization (IBDFE). The coefficients of the filter can be kept unchanged in each iteration based on the given channel frequency response. The Unique Word (UW) sequence, which was inserted into frame structure and the cyclic prefix, could reduce the overhead of the system. The simulation results show that the performance of the proposed algorithm is better than the conventional linear equalization algorithm in high Signal to Noise Ratio (SNR) and close to the IBDFE algorithm in the same iteration times. However, the complexity of the proposed algorithm is lower than that of the conventional IBDFE algorithm.

Key words: communication, single carrier frequency domain equalization(SC-FDE), decision feedback equalization, mean square error, unique word sequence

CLC Number: 

  • TN929
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