An adaptive scheme of impulsive noise suppression for ISDB-T receivers

An adaptive scheme of impulsive noise suppression for ISDB-T receivers
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DOI：
10.1109/ispacs.2010.5704673
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发表时间：
2010-12
期刊：
2010 International Symposium on Intelligent Signal Processing and Communication Systems
影响因子：
--
通讯作者：
Ziji Ma;R. Miyamoto;M. Okada
Ziji Ma;R. Miyamoto;M. Okada
中科院分区：
其他
文献类型：
--
作者：
Ziji Ma;R. Miyamoto;M. Okada

文献摘要

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由于 OFDM 信号的衰减，脉冲噪声干扰是 ISDB-T 接收机的一个重要问题。在本文中，我们提出了一种完全自适应的方案来抑制脉冲噪声的影响。利用频域中的保护带可以准确地检测出脉冲噪声的位置。然后，我们采用自适应窗函数根据脉冲噪声功率与平均信号功率之比来抑制脉冲干扰。仿真结果证实了所提出的 ISDB-T 接收机方案在 AWGN 信道和瑞利衰落信道中的有效性。
Impulsive noise interference is a significant problem for ISDB-T receivers due to attenuation of OFDM signal. In this paper, we propose a wholly adaptive scheme to suppress the effect of the impulsive noise. The location of the impulsive noise can be accurately detected by using the guard band in frequency domain. Then we employ an adaptive window function to suppress the impulsive interference in terms of the ratio of the impulsive noise power and the average signal power. Simulation results confirm the validity of the proposed scheme for the ISDB-T receivers in both AWGN channel and Rayleigh fading channel.