CAJ | 학술논문

研究使用随机微分方程产生相关衰落信道中接收机的抽头统计量.使用Iangevin方程对发生Doppler频移的随机相位进行建模,在对多径分量的幅度增益进行合理建模以后,从理论上证明表征抽头带通信号的统计特性仍然服从Rayleigh分布.使用仿真方法研究了相关衰落信道统计量的一些统计特性,发现随机相位是具有一定相关关系的高斯变量,所得抽头为独立的Rayleigh变量.
연구사용수궤미분방정산생상관쇠락신도중접수궤적추두통계량.사용Iangevin방정대발생Doppler빈이적수궤상위진행건모,재대다경분량적폭도증익진행합리건모이후,종이론상증명표정추두대통신호적통계특성잉연복종Rayleigh분포.사용방진방법연구료상관쇠락신도통계량적일사통계특성,발현수궤상위시구유일정상관관계적고사변량,소득추두위독립적Rayleigh변량.
Stochastic differential equations (SDE) are applied to generate correlated random variables as receiver taper of fading channels. It is assumed that the random phases can be modeled through a Langevin equation and the amplitude gains follow a reasonable distribution, which are characterized by SDE. We further prove that the band-passed signals of tap in multipath channel still follow Rayleigh distribution. Simulation results of statistical character-istics of correlated fading channel, such as correlation function and Doppler power spectrum, agree well with the theo-retic values. The random phase is correlated Ganssian variables and the taper is the independent Rayleigh variables, which demonstrate the applicability of the proposed methodology.