Abstract
AbstractRecently, in order to improve channel use efficiency, the SDMA (Space Division Multiple Access) system has been proposed. In this paper, an adaptive array is applied to a cellular system and the SDMA system with MMSE‐based weight control performed for fixed channel assignment and dynamic channel assignment is discussed. In addition to the conventional blocking rate and the forced call termination rate, the ISR (Incomplete Service Rate) is defined as a new QoS (Quality of Service) and its characteristics are evaluated. Further, the occupation rate within the home cell by the SDMA system is studied with random assignment. It is found that the capacity increases by a factor of 2.08 with a blocking rate of 3% when the SDMA system is combined with a fixed channel assignment of nine cell repetition. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 86(11): 75–83, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.10069
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