无线链路预算的靠谱工具征集介绍

yong200445@

    课本及资料涉及无线传播，链路预算的，基本用ITU模型，公式；相关软件介绍的少。开贴征集讨论，看那种工具用起来最顺手，让新人少走弯路。
    抛转引玉：
    1、matlab  够专业，操作较繁琐；
    2、ITM  不够系统
         ITM estimates radio propagation losses over irregular terrain for VHF, UHF and SHF frequencies as a function of distance and the variability of signal in time and space.  The model is based on electromagnetic theory and signal loss variability expressions derived from extensive sets of measurements.   The ITM algorithm works in two modes: 1) area prediction mode, and 2) point-to-point mode.  The input parameters include frequency, distance, antenna heights, polarization, surface refractivity, electrical ground constants, climate, reliability and confidence levels, percent time and location, and siting criteria.   For the area prediction mode, terrain irregularity parameter is needed and the output is either a table of transmission losses in dB vs. distance for several confidence levels or graphs of dB loss vs. distance for specified confidence levels.  For the point-to-point mode, the model requires terrain data and the path coordinates are specified.  The output is a list of estimated transmission losses for specifies values of reliability and confidence levels.  The output screen also contains a snapshot of the terrain profile.
      Valid ranges of input parameters:
     Frequency        20 MHz to 20 GHz.
     Distance          1 km to 2000 km.
      Antenna heights  0.5 m to 3000 m.
    3、Radio Mobile  
     期待大家补充。