Multi‐keyhole model for MIMO repeater system evaluation
誠 鶴田, Yoshio Karasawa · Electronics and Communications in Japan (Part II Electronics) · 2007
Abstract Enhancement of service to closed spaces (independent spaces) via a repeater with several transmission lines is attracting attention as a means of expanding the service area of information transmission by MIMO. The propagation path in such environments becomes a multi‐keyhole environment in the equivalent sense. The existence of a keyhole causes a reduction of communication capacity. However, in a multi‐keyhole environment, the impact is reduced because multi‐stream transmission becomes possible. In this paper, we propose a MIMO repeater system and a multi‐keyhole model that realize repeater functions to a closed space while high‐speed and high‐reliability communication characteristic to MIMO are maintained. The eigenvalue distribution, average communication capacity, and average BER characteristics of the MIMO repeater channel are ascertained by computer simulations. The number of repeater antennas needed for relaying with the MIMO function maintained is determined. ©2007 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 90(10): 40–48, 2007; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecjb.20384