CAJ | 학술논문

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。
침대비상관다경서리쇠락신도，제출료일충개진적기우래사정현화적방진모형。재원시정학다보륵확전방법적기출상，대다보륵빈솔인입료신적선전각정의，실현료각다경신도적비상관성。이론여방진분석표명，해방법적자상관화호상관특성여삼고모형상비구유겁호적문합성，병차재상동실현조건하，여기타개진형정학다보륵방법상비정도상야유료20%적제고，증실신모형능경준학지묘술비상관다경서리쇠락신도。
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.