Theoretical evaluation of spectral efficiency and outage probability of TDMA multihop cellular systems

Abstract

AbstractFor TDMA cellular systems that introduced multihop transmission, the spectral efficiency and outage probability in a single‐cell environment are formulated and evaluated numerically. By using approximations, the numerical evaluation is also conducted in an interference‐limited multicell environment and compared to simulation results. In formulating these performances, the focus is on the common points of multihop transmission and symbol rate control, and a method similar to the performance evaluation method of rate‐adaptive TDMA cellular systems is applied. In particular, the opposite effects of multihop transmission on the spectral efficiency are explicitly considered. In a single cell environment, instead of lowering the spectral efficiency somewhat by the introduction of multihop transmission, the cell coverage satisfying the allowable outage probability could be clearly expanded. A multicell environment could be implemented with cell reuses with a smaller allowable outage probability resulting from the introduction of multihop transmission. Consequently, an improved spectral efficiency is expected. © 2006 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 90(4): 1–10, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.20366