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OFDM系统中基于频率响应包络PSD的最大多普勒频移盲估计算法

DOI: 10.13190/jbupt.201304.51.wangy, PP. 55-58

Keywords: 正交频分复用,最大多普勒频移估计,频率响应包络功率谱密度,盲估计

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Abstract:

提出了一种基于正交频分复用系统的最大多普勒频移盲估计算法.利用恒包络调制的子载波,在接收端获得这些子载波的幅值后按经典周期图法估计其功率谱密度(PSD)的幅值.最大多普勒频移通过获取功率谱密度的分界点位置得到.不同于传统的功率谱密度方法,本算法不需要信道响应的估计值,并且估计精度也有所提高.仿真结果表明,本算法有较好的鲁棒性,在大范围内的多普勒频移下都能保持高估计精度.

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