Performance evaluation of radio transmission in multipath propagation environments using characteristic function method

Abstract

AbstractA method for evaluating digital radio transmission performance in multipath propagation is proposed, and two typical environments are evaluated. The multipath environments examined have radio waves with both longer and shorter arrival‐delay differentials than the symbol duration. The effects of radio waves on symbol detection are expressed by an amplitude distribution which is efficiently obtained using a characteristic function method. Results show that degradation was the source of the intersymbol interference in closed‐space environments, and an increase in the symbol rate degrades transmission performance. By comparison in open‐space line‐of‐site urban environments, site‐specific multipath interference decreases the symbol detection margin, and a sharp degradation in transmission performance occurs. © 2001 Scripta Technica, Electron Comm Jpn Pt 1, 84(9): 64–73, 2001