Performance of DS-UWB multiple-access systems with diversity reception in dense multipath environments
Performance of DS-UWB multiple-access systems with diversity reception in dense multipath environments
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DOI：
10.1109/tvt.2006.877694
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发表时间：
2006-07
影响因子：
6.8
通讯作者：
Sheu-Sheu Tan-Sheu;A. Nallanathan;B. Kannan
中科院分区：
文献类型：
--
作者：
Sheu-Sheu Tan-Sheu;A. Nallanathan;B. Kannan
超宽带（UWB）技术的特点是传输极短持续时间的无线电脉冲。为了提高其多址能力，UWB技术可以与传统的扩频技术相结合。本文论证了在密集多径环境中，空间和时间分集对直接序列（DS）UWB多址系统性能的影响。数值结果表明，通过增加天线阵元数和/或在接收端增加相干多径，DS-UWB系统的误比特率性能可以得到显著改善。此外，本文还研究了阵列几何形状对系统性能的影响，表明矩形阵列可以捕获更多的能量，因此可以提供比均匀线阵更好的性能
Ultrawideband (UWB) technology is characterized by transmitting extremely short duration radio impulses. To improve its multiple-access capability, the UWB technology can be combined with traditional spread-spectrum techniques. This paper demonstrates the influence of spatial and temporal diversities on the performance of direct-sequence (DS) UWB multiple-access systems in dense multipath environments. Numerical results show that the bit error rate performance of the DS-UWB system can be improved significantly by increasing the number of antenna array elements and/or by adding more multipaths coherently at the receiver. Furthermore, this paper studies the impact of array geometry on system performance and shows that a rectangular array can capture more energy and thus can offer better performance than a uniform linear array