On the optimum linear receiver for impulse radio systems in the presence of pulse overlapping
On the optimum linear receiver for impulse radio systems in the presence of pulse overlapping
复制标题
存在脉冲重叠的脉冲无线电系统的最佳线性接收机
DOI：
10.1109/lcomm.2005.04025
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Huaping Liu
中科院分区：
文献类型：
--
作者：
Shiwei Zhao;Huaping Liu
在脉冲无线电超宽带系统中，多径延迟可能导致接收到的脉冲彼此重叠。脉冲重叠会导致脉冲间干扰 (IPI)，尤其是在密集的多径环境中，这可能会严重限制系统性能。在这封信中，我们建立了一个考虑脉冲重叠的数学模型，并推导出最佳的最小均方误差（MMSE）接收器。更简单的 RAKE 接收器是对每个接收到的脉冲进行采样，并通过忽略 IPI 来执行最大比合并 (MRC)。然后，我们通过分析方法表明，最佳线性 MMSE 接收器的性能与更简单的 MRC 接收器完全相同。
In impulse radio ultra-wideband systems, multipath delay may cause received pulses to overlap with each other. Pulse overlapping causes inter-pulse interference (IPI) which may, especially in dense multipath environments, severely limit the system performance. In this letter, we build a mathematical model with pulse overlapping considered and derive an optimum minimum mean-square error (MMSE) receiver. A simpler RAKE receiver is to take samples for each received pulse and perform maximal ratio combining (MRC) by ignoring the IPI. We then show, by an analytical approach, that the optimum linear MMSE receiver performs exactly the same as the simpler MRC receiver.