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IR-UWB系统中基于归一化门限的TOA估计

DOI: 10.13190/j.jbupt.2015.04.005, PP. 19-23

Keywords: 脉冲超宽带,门限比较,TOA估计

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Abstract:

在基于能量检测的脉冲超宽带测距算法中,如何提高测距精度始终是研究热点.提出一种基于门限比较的两步积分到达时间(TOA)估计算法及相应的门限设置算法.考虑到长积分周期门限比较(TC)算法的测距精度低于短周期,在前者基础上重新进行短周期积分检测,构成两步积分TOA估计算法;根据最优归一化门限与能量采样序列最大值均值比(AMMR,advancedmaximumenergysampletomeanratio)的函数关系,提出基于AMMR值的门限设置算法(AMMR-TC),实现了最优归一化门限值的设置.由于短积分周期下,AMMR-TC的性能稍弱于基于能量序列最大最小值比的(MMR-TC)算法,提出将AMMR-TC与均值-门限比较(MEAN-TC)相结合的AMMR-MEAN-TC算法.仿真分析结果表明测距精度均有一定提高.

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