Cramer-Rao bound for channel parameters in ultra-wide band based system
Cramer-Rao bound for channel parameters in ultra-wide band based system
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DOI：
10.1109/spawc.2004.1439220
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发表时间：
2004-07
期刊：
影响因子：
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通讯作者：
A.-L. Deleuze
中科院分区：
文献类型：
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作者：
A.-L. Deleuze
本文主要研究标准超宽带(UWB)系统中的信道估计问题。我们考虑基于二进制脉冲位置调制的脉冲无线电方案以及基于扩频跳时多址的方案。我们给出了(REP.数据辅助中多径信道参数的Cramer-Rao界(分别为非数据辅助)上下文。将多址干扰假设为加性高斯白噪声，得到了相应的推导公式。相反，考虑了信号回波之间的重叠。最后，通过对跳时随机序列和符号随机序列上的费舍尔信息矩阵求平均来完成简化。
This work focuses on channel estimation in standard ultra-wide band (UWB) based system. We consider impulse radio scheme relying on a binary pulse position modulation as well as on a spread-spectrum time-hopping multiple access. We address the closed-form expressions of the (resp. modified) Cramer-Rao bound for the multipath channel parameters in data-aided (resp. nondata-aided) context. The derivations have been developed by assuming the multiple-access interference as an additive white Gaussian noise. Conversely the overlapping between signal echoes has been taken into account. Finally simplifications have been done by averaging the Fisher information matrix over the time-hopping random sequence as well as over the symbol random sequence.