Journal of Systems Engineering and Electronics ›› 2012, Vol. 34 ›› Issue (4): 789-794.doi: 10.3969/j.issn.1001-506X.2012.04.27

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DOA estimation of coherent signals based on fourthorder cumulant and temporal smoothing

JING Xiao-rong1,2， SUI Wei-wei1,2， ZHOU Wei2,3   

  1. 1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065， China; 2. Chongqing Key Lab of Mobile Communications Technology，Chongqing 400065，China; 3. College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065， China
  • Online:2012-04-25 Published:2010-01-03

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Abstract:

A combined algorithm is proposed to estimate the direction of arrivals (DOAs) of multi-path signals for multi-users in colored Gaussian noise channels. In this algorithm, the spatial signature of each user is firstly estimated by the fourth order cumulant. Then the multiple signal classification (MUSIC) algorithm based on temporal smoothing is adopted to estimate the DOAs of the multi-path signals of each user. It can break through the limit of the traditional spatial smoothing liked algorithms. For a uniform linear array with M elements, the new algorithm can estimateM×(M－1)DOAs and each DOA can automatically match with its user. The result of computer simulations confirms the effectiveness of the combined algorithm.

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