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| 1 | Particle filtering based channel estimation in OFDM power line communication显示文摘Particle filtering(PF) algorithm has the powerful potential for coping with difficult non-linear and non-Gaussian problems. Aiming at non-linear, non-Gaussian and time-varying characteristics of power line channel, a time-varying channel estimation scheme combined PF algorithm with decision feedback method is proposed. In the proposed scheme, firstly the indoor power line channel is measured using the pseudo-noise(PN) correlation method, and a first-order dynamic autoregressive(AR) model is set up to describe the measured channel, then, the channel states are estimated dynamically from the received signals by exploiting the proposed scheme. Meanwhile, due to the complex noise distribution of power line channel, the performance of channel estimation based on the proposed scheme under the Middleton class A impulsive noise environment is analyzed. Comparisons are made with the channel estimation scheme respectively based on least square(LS), Kalman filtering(KF) and the proposed algorithm. Simulation indicates that PF algorithm dealing with this power line channel estimation difficult non-linear and non-Gaussian problems performance is superior to those of LS and KF respectively, so the proposed scheme achieves higher estimation accuracy. Therefore, it is confirmed that PF algorithm has its own unique advantage for power line channel estimation. | ZHANG Pei-ling ZHANG Hong-xin LIU Hong-da ZHANG Yu-jing HE Peng-fei PANG Xue-li | 2014 | The Journal of China Universities of Posts and Telecommunications2014，21，5： | 4 |
| 2 | 航天器低电压差分信号线缆辐射干扰研究显示文摘基于双绞线结构及低电压差分信号(LVDS)的周期特性,运用数值评估与多导体传输线理论模型仿真的方法,分析了多个分叉的LVDS线缆辐射干扰强度。之后,提出了LVDS线缆辐射干扰的抑制工艺措施。理论分析与实测结果吻合较好,验证了采用多导体传输线法分析LVDS线缆的辐射特性,并证实了在总装工艺过程中采取屏蔽加固措施的有效性,可为优化航天器LVDS线缆布局提供参考。 | 阳彪 徐军 刘晓 | 2014 | 航天器工程2014，23，5： | 1 |
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