Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2008, Vol. 31 ›› Issue (6): 117-120.doi: 10.13190/jbupt.200806.117.xiaolh

• Reports • Previous Articles     Next Articles

Effect of Antenna Directivity on the Channel Capacity of MIMO Systems

XIAO Li-hua, LI Li, WANG Hua-zhi   

  1. (School of Telecommunication Engineering, Beijing University of Posts and
    Telecommunications, Beijing 100876, China)
  • Received:2008-05-04 Revised:2008-09-11 Online:2008-12-31 Published:2008-12-31
  • Contact: LI Hua XIAO

Abstract:

The effect of antenna directivity on both spatial fading correlation and signal-to-noise ratio based on Kronecker channel model is investigated in three dimensional scattering environments. The channel capacity of multiple-in multiple-out system for uniform circular array, line array, and rectangle array is studied. The contribution of antenna directivity to channel capacity is concluded that, when the main lobe of directive antenna points at the coming wave, the improved signal to noise ratio resulting from the antenna directivity will exceed the negative impact caused by increased spatial fading correlation, leading to a better channel capacity than that of isotropic antenna. The stronger antenna directivity is, the greater the channel capacity.

Key words: antenna directivity, spatial fading correlation, signal-to-noise ratio, capacity, multiple-in-multiple-out

CLC Number: