Joint TOA/AOA estimation of IR-UWB signals in the presence of multiuser interference
Joint TOA/AOA estimation of IR-UWB signals in the presence of multiuser interference
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DOI：
10.1109/spawc.2014.6941925
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
Fang Shang;B. Champagne;I. Psaromiligkos
中科院分区：
文献类型：
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作者：
Fang Shang;B. Champagne;I. Psaromiligkos
针对接收端采用天线阵且存在多用户干扰的脉冲超宽带(IR-UWB)定位系统，提出一种联合估计到达时间(TOA)和到达角(AOA)的方法。该方法包括三个步骤：(1)时间对准和平均，以降低MUI和背景噪声的功率水平；(2)基于能量检测的TOA初步估计，然后进行二次平均；(3)使用最近提出的对数似然函数来联合TOA和AOA估计，但进一步扩展以考虑MUI的影响。在一个真实的空时信道模型上进行了数值仿真，验证了该方法的有效性。
We present a joint estimator of the time-of-arrival (TOA) and angle-of-arrival (AOA) for impulse radio ultra-wideband (IR-UWB) localization systems in which an antenna array is employed at the receiver and multiuser (MUI) interference exists. The proposed method includes 3 steps: (1) time-alignment and averaging to reduce the power level of the MUI and background noise; (2) preliminary TOA estimation based on energy detection followed by quadratic averaging; (3) joint TOA and AOA estimation using a recently proposed log likelihood function, but further extended to consider the effect of MUI. The validity of the proposed method is demonstrated by numerical simulations over a realistic space-time channel model.