基于IC着色的认知差分跳频系统多址原理

Cognitive Radio and IC-Colorings Based Multiple Access Algorithm for Differential Frequency Hopping Network

本文将认知无线电(cognitive radio,CR)和图论引入差分跳频(differential frequency hopping,DFH)网络,提出基于IC着色和干扰温度模型的认知差分跳频多址(IC-ITMA)原理,用IC着色与干扰温度理论控制网内用户的发射行为,网内各发射机在接收机处产生的干扰温度正交.接收机根据测得的干扰温度来区分它们,使之达到区分预期信号和干扰信号的目的.仿真结果表明,该方法较传统差分跳频网络可以显著提高抗多址干扰性能.

The cognitive radio technology is introduced in DFH,and the IC-ITMA algorithm is proposed. This algorithm is based on the interference temperature model,the IC-colorings and IC-indices of graphs. In short,the interference temperatures on the detection trellis at the receiving antenna,which are caused by the transmitters,are restricted and measured by the receiver. The transmitters can be distinguished by the dissimilar values of the interference temperatures. The maximal IC-coloring method is used to compute the predisposed value of each user＇s interference temperature. The scenario simulations of the IC-ITMA based DFH network and the traditional DFH are performed,respectively. The results show that the IC-ITMA DFH can obtain favorable network performance.