摘要
针对非相关多径瑞利衰落信道,提出了一种改进的基于莱斯正弦和的仿真模型。在原始精确多普勒扩展方法的基础上,对多普勒频率引入了新的旋转角定义,实现了各多径信道的非相关性。理论与仿真分析表明,该方法的自相关和互相关特性与参考模型相比具有极好的吻合性,并且在相同实现条件下,与其他改进型精确多普勒方法相比精度上也有了20%的提高,证实新模型能更准确地描述非相关多径瑞利衰落信道。
An improved simulation model based on Rice＇s Sum-of-Sinusoids is proposed for uncorrelated multiple Rayleigh fading channels. Based on the original Method of Exact Doppler Spread （MEDS）,the angle of rotation is introduced for the Doppler frequency of the new simulation model, and multiple chan-nels are uncorrelated with each other. Both theory and simulation show that a pretty good agreement be-tween the auto-correlation and cross-correlation properties of the new model and those of the underlying reference model has been observed. Its accuracy is improved by 20% in comparison with other generalized MEDS in the same conditions.
出处
《电讯技术》
北大核心
2013年第12期1610-1613,共4页
Telecommunication Engineering
基金
总装备部科研项目~~
关键词
信道模拟
非相关
多径瑞利衰落信道
正弦和
旋转角
channel simulation
uncorrelated
multiple Rayleigh fading channel
sum-of-sinusoids
angle of rotation
