CAJ | 학술논문

针对频率非选择性无线多径衰落信道,基于室外通信环境下的空心圆模型,提出了一种改进的适应于室内通信环境的空心圆模型.通过推导接收信号的空时联合分布以及边缘分布概率密度函数,分析和比较了两种空心圆几何信道模型的空时统计特性.通过空心圆的空心率以及收发机间距的信道参数变化,仿真结果阐明了空心圆模型在圆盘模型和圆环模型之间过渡的变化机理,以及不同无线通信环境下的信道信息.
침대빈솔비선택성무선다경쇠락신도,기우실외통신배경하적공심원모형,제출료일충개진적괄응우실내통신배경적공심원모형.통과추도접수신호적공시연합분포이급변연분포개솔밀도함수,분석화비교료량충공심원궤하신도모형적공시통계특성.통과공심원적공심솔이급수발궤간거적신도삼수변화,방진결과천명료공심원모형재원반모형화원배모형지간과도적변화궤리,이급불동무선통신배경하적신도신식.
For the frequency non-selective wireless multipath fading channel,an improved hollow-disc model is proposed for indoor communication environments based on the hollow-disc model for outdoor communication envi-ronment. The joint and marginal probability density function(PDF)of angle of arrival(AOA)and time of arrival (TOA)are derived in closed-form expressions. The spatial and temporal statistical properties of these two hol-low-disc models are analysed and compared. By varying the hollow-disc ratio and the distance between base sta-tion and mobile station,simulations illustrate the variation mechanism when hollow-disc models transits from the circle-disc to ring model,and channel information under different wireless communication environments.