Journal of Xidian University

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Spatial selectivity of network interference in the three-dimensional angular domain

DU Derong1;ZENG Xiaoping1;JIAN Xin1;YANG Fan1,2;CHEN Li1   

  1. (1. College of Communication Engineering, Chongqing Univ., Chongqing 400044, China;
    2. Chongqing Jinmei Communication Co. Ltd, Chongqing 400044, China)
  • Received:2017-12-14 Online:2018-10-20 Published:2018-09-25

Abstract:

A three-dimensional (3-D) Gaussian interference distribution model and the corresponding interference angular power density (IAPD) are proposed to investigate the spatial selectivity of network interference in the angular domain for the large-scale wireless communication networks comprising many spatially scattered nodes. Then, based on the IAPD and the theory of 3-D shape factors, the closed-form expressions for some important spatial statistics, such as the 3-D unnormalized complex spherical harmonic coefficients, interference shape factors, fading rate variance, spatial correlation, and coherence distance are derived. Simulation results show that the 3-D spatial angular directions have a significant effect on the IAPD and these spatial statistics, and the 15° elevation angle is the proper pointing direction for 3-D smart antennas and adaptive beamforming design.

Key words: wireless networks, interference analysis, spatial distribution