Radio wave propagation characteristic estimation system, radio wave propagation characteristic estimation method, and radio wave propagation characteristic estimation program

摘要

Disclosed are a radio wave propagation characteristic estimation system, radio wave propagation characteristic estimation method, and radio wave propagation characteristic estimation program for estimating propagation characteristics of radio waves at high speeds, without deteriorating accuracy. An object selection module reads map data prerecorded on a map data memory unit and selects structures from the structures indicated in structure data included in the map data according to the height thereof, a radio wave propagation path calculation module searches for the path of radio waves emitted from a transmission point based on the structure data related to the selected structures and location data for the transmission point and an observation point, and calculates the propagation path of the radio waves until the radio waves reach the observation point, and a radio wave propagation characteristic estimation module estimates the propagation characteristics of radio waves at the observation point based on this calculated path.

主权项

1. A radio wave propagation characteristic estimation system, comprising:
a map data memory unit which stores map data containing structure data which shows locations and stereoscopic shapes of structures existing within peripheral areas of a transmission point and an observation point; a reference line specification module which specifies a reference altitude based on at least one of an altitude of the transmission point and an altitude of the observation point; an object selection module which reads out the map data from the map data memory unit, and selects a structure of a height equal to or higher than the reference altitude from among the structures shown in the structure data contained in the map data for calculating a radio wave propagation path; a radio wave propagation path calculation module which searches the path of the radio wave emitted from the transmission point based on the structure data regarding the structure selected by the object selection module, and calculates the propagation path through which the radio wave reaches the observation point; and a radio wave propagation characteristic estimation module which estimates a propagation characteristic of the radio wave arriving at the observation point based on the calculated radio wave propagation path.