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在密集多径信道中,通过研究直接序列超宽带(DS-UWB)的Rake接收机信号模型,分析了多径干扰给接收机性能带来的影响,提出了一种分析接收机性能的半解析方法。这种方法将高斯分布函数展开成级数形式,省略了对不同数据序列取平均的过程,从而显著降低了性能分析的计算量。仿真结果表明,该方法能有效分析密集多径信道中DS-UWB Rake接收机的性能,分析结果与仿真结果相吻合,并且比用高斯分布近似多径干扰的方法精确。
In dense multipath channels, the Rake receiver signal model of direct sequence ultra-wideband (DS-UWB) is studied to analyze the effect of multipath interference on receiver performance. A semi-analytical method to analyze receiver performance is proposed method. This method expands the Gaussian distribution function into a series form, omitting the process of averaging different data sequences, significantly reducing the computational complexity of performance analysis. The simulation results show that this method can effectively analyze the performance of DS-UWB Rake receiver in dense multipath channels. The analysis results are in good agreement with the simulation results, and are more accurate than multipath interference approximation using Gaussian distribution.