周期性脉冲噪声对OFDM的影响

2015 IEEE International Symposium on Power Line Communications and Its Applications (ISPLC) Pub Date : 2015-07-06 DOI:10.1109/ISPLC.2015.7147612

T. Shongwe, A. Vinck, H. Ferreira

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引用次数: 24

摘要

研究了周期脉冲(短时)噪声对OFDM的影响。我们给出了周期脉冲噪声性质的结果，表明周期脉冲噪声的PDF不是完全高斯的。我们的研究结果还表明，与随机脉冲噪声相比，周期性脉冲噪声对OFDM的破坏性更大。这是因为周期性脉冲噪声能量不是由FFT在OFDM的接收端传播，而是在频域中呈现周期性。结果表明，零化对周期性脉冲噪声的抑制效果显著。我们建议一个简单的短块码(而不是长块码)，可以有效地对抗周期性脉冲噪声的影响。

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The effects of periodic impulsive noise on OFDM

The effect of periodic impulsive (short duration) noise on OFDM is investigated. We present results on the nature of periodic impulsive noise, showing that the PDF of periodic impulsive noise is not exactly Gaussian. We also present results showing that periodic impulsive noise can be more devastating to OFDM compared to random impulsive noise. This is because periodic impulsive noise energy is not spread by the FFT on the receiver side of the OFDM, instead it appears periodic in the frequency domain. Results showing the effect of nulling to mitigate periodic impulsive noise are presented. We suggest a simple short block code (as opposed to long block codes) that can effectively combat the effects of periodic impulsive noise.

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2015 IEEE International Symposium on Power Line Communications and Its Applications (ISPLC)

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