| 摘要 |
PURPOSE:To easily generate an interference table by storing various characteristics and line design parameters related to radio propagation between base stations and inputting the transmission condition, the installation position, and obstacle conditions of a new provided station to operate them. CONSTITUTION:Transcendental knowledge is inputted preliminarily to the data board of a storage block 50. This transcendental knowledge consists of a table 1 indicating characteristics of use frequency and distance, the characteristic table 2 of radio attenuation due to obstacles between base stations, and the table 3 of parameters of line design (transmission power, transmission and reception antenna gains, required reception output, circuit loss, D/U ratio, elec tric field variance, maintenance margin, etc.,). Data of positional relations be tween base stations is inputted in a step 60 to calculate the dimensions of an average interference area in a step 70. The distance between base stations is calculated without taking indoor obstacles into consideration, and this distance and dimensions of the average interference area are compared at each contact. Thus, the interference table is generated easily. |
