基于ITS模型的短波宽带信道建模与仿真  

Modeling and Simulation of Wideband Shortwave Channel Based on ITS Model

作　　者：赵旦峰[1] 叶建超[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《计算机仿真》2009年第6期128-130,199,共4页Computer Simulation

基　　金：预研基金项目(06J3.4.1)

摘　　要：短波宽带信道的研究是设计短波宽带通信系统的基础,从上个世纪80年代以来短波宽带信道的探测和建模得到了极大发展,美国ITS组织提出的短波宽带信道模型突破了传统Watterson模型有效带宽仅有12kHz的限制,其有效带宽可达1MHz。为了评估短波宽带通信系统性能,提出一种基于ITS模型的短波宽带信道仿真的实现方法,并利用散射函数对信道传输特性进行了仿真。通过引入平滑滤波算法获得散射函数等高线,对平均延时、延时扩展、多普勒频移、多普勒扩展以及多普勒频移随延时变化的特性进行了定量分析,证明了仿真信道的有效性。The research of wideband high frequency channel is the base of developing wideband HF communication systems. Since 1980＇ s the detection and modeling of wideband HF channel have obtained an enormous development, the wideband HF channel model developed by the Institute for Telecommunication Sciences （ITS） eliminates the 12kHz bandwidth limitation of the Watterson channel model, and the wideband HF channel model＇s available bandwidth reaches 1MHz. In order to assess the performance of wideband shortwave communications systems, a way for wideband shortwave channel simulation based on ITS model was proposed, and the transmission characteristics of wideband shortwave channel was simulated using scattering function. The contours of scattering functions were ob- tained by introducing a smoothing filter algorithm, and the quantitative analysis of average delay, delay spread, Doppler shift , Doppler spread and the rate of change of Doppler shift with respect to delay, was conducted, the effectiveness of simulation channel was proved.

关 键 词：短波宽带信道 延时扩展 多普勒频移 多普勒扩展 

分 类 号：TN911[电子电信—通信与信息系统]