Journal of Systems Engineering and Electronics ›› 2013, Vol. 35 ›› Issue (1): 179-183.doi: 10.3969/j.issn.1001-506X.2013.01.30

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Research on spatial diversity interference alignment

WANG Qin-min1，2， HANG Zhong-pei1，LIU Ming2，JIE Feng-ke2   

  1. 1. National Key Laboratory of Science and Technology on Communications,  University of Electronic Science and Technology of China, Chengdu 611731, China; 2.Information System Engineering Institute, Information Engineering University, Zhengzhou 450001, China
  • Online:2013-01-23 Published:2010-01-03

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Abstract:

Interference alignment (IA) can achieve maximum degree of freedom in interference channal by aligning all the interference into an identical subspace at the receive side. IA degrades the reliability under the condition of low signal to noise ratio (SNR). After analyzing conditions of the diversity IA, the feasible schemes for implementing oneside and two side diversity based on subspace projection are proposed. The impact mechanism of diversity on IA is presented by theoretic analysis and simulations. The comparison of diversity and multiplexing for IA is presented. Diversity can improve the received SNR of IA and lower the error probability, which improves the performance of IA at low SNR. Finally, the performance of IA is verified by simulations.

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