基于空中平台的无线话音中继通信网的容量分析

Capability Analysis of Wireless Voice-Relay Communication Network based on Airborne Platform

针对无线话音中继网络多平台共用信道必然产生"互扰"的特点,定义了话音中继网络三种通信形态,提出了判决网络容量的网络噪杂系数的概念,将无线通信信号衰落特性与Erlang话务量模型相结合,通过分析不同调制方式下中继平台数量与干扰概率、拥塞概率之间的关系,得出了中继网络容量。并指出话音中继通信时可通过合理规划中继网络、选择调制方式及人为协同的方法,合理规避通信干扰或拥塞,对工程应用具有参考价值。

Aiming at the characteristics of mutual interference by multiple platforms of wireless voice-relay network with shared channel, three types of voice-relay network are defined, and the concept of network noisy-coefficient for judging network capacity also presented. In combination with the fading characteristic of wireless communication signal and Erlang＇s telephone traffic model, and the capacity of relay network is obtained through analysis on the relation between relay platform number and interference probability and congestion probability in different modulation systems. Furthermore, this paper points out that communica- tion interference or congestion could be properly avoided by reasonable planning of relay network, choice of modulation system and manual collaboration in voice-relay communication. All this could serves as a refer- ence for engineering application.