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International Journal of Antennas and Propagation
Volume 2015, Article ID 607563, 11 pages
http://dx.doi.org/10.1155/2015/607563
Research Article

Beamforming and Interference Cancellation in D2D Random Network

1Beijing University of Posts and Telecommunications, Beijing 100876, China
2Anqing Normal University, Anqing 246011, China

Received 15 January 2015; Revised 3 March 2015; Accepted 4 March 2015

Academic Editor: Heng-Tung Hsu

Copyright © 2015 Langtao Hu and Chaowei Yuan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Device-to-Device (D2D) communication is an important proximity communication technology. We model the hybrid network of cellular and D2D communication with stochastic geometry theory. In the network, cellular base stations are deployed with multiantennas. Two transmission strategies including beamforming and interference cancellation are proposed to boost system achievable rate in this paper. We derive analytical success probability and rate expression in these strategies. In interference cancellation strategy, we propose the partical BS transmission degrees of freedom (dofs) that can be used to cancel its D2D users (DUEs) interferences around the BS or to boost the desired signal power of associated cellular (CUE). In order to maximize the total area spectral efficiency (ASE), the BS transmission degrees of freedom are allocated according to proper interference cancellation radius around the BS. Monte Carlo simulations are performed to verify our analytical results, and two transmission strategies are compared.