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Interference cancellation scheme without feedback is proposed for X channels with four antennas at each user. Space-time codeword with Alamouti structure is designed for each user. Codewords are combined according a certain rule. The unwanted codewords are cancelled by linear operation on the received signals. Then, multi-user interference is mitigated by the orthogonal property of the Alamouti code. Comparing with the existing scheme for the same scene, feedback information is not required in the proposed scheme. So the transmission efficiency is improved.

KEYWORDS

X Channel, Space-Time Codeword, Multi-User Interference, Transmission Efficiency, Feedback Information

Cite this paper

Tian, X. , Yang, D. , Zhang, H. and Jia, W. 2017 Improved Interference Cancellation Scheme for X Channels with Four Antennas. Journal of Computer and Communications, 5, 57-64. doi: 10.4236-jcc.2017.56004.





Autor: Xinji Tian, Dong Yang, Haotian Zhang, Wenjie Jia

Fuente: http://www.scirp.org/



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