电力线通信系统中基于OFDM/OQAM的时频结合消噪算法

doi:10.11772/j.issn.1001-9081.2017071727

计算机应用 ›› 2018, Vol. 38 ›› Issue (1): 228-232.DOI: 10.11772/j.issn.1001-9081.2017071727

电力线通信系统中基于OFDM/OQAM的时频结合消噪算法

郑建宏^1,2, 张恒¹, 李飞¹, 李想¹, 邓湛¹

1. 重庆邮电大学通信与信息工程学院, 重庆 400065;
2. 重庆邮电大学新一代宽带移动通信重点实验室, 重庆 400065

收稿日期:2017-07-14 修回日期:2017-09-02 出版日期:2018-01-10 发布日期:2018-01-22
通讯作者: 张恒
作者简介:郑建宏(1969-),男,重庆人,教授,硕士,主要研究方向:通信核心芯片、协议与系统应用技术;张恒(1992-),男,湖北荆门人,硕士研究生,主要研究方向:电力线通信脉冲干扰消除和信道均衡技术;李飞(1992-),男,湖北黄冈人,硕士研究生,主要研究方向:电力线通信中的脉冲干扰抑制;李想(1993-),男,湖南长沙人,硕士研究生,主要研究方向:电力线通信中的信号检测;邓湛(1992-),男,广东湛江人,硕士研究生,主要研究方向:电力线通信中的信道估计。
基金资助:
国家科技重大专项（2016ZX03002010-003）。

Time-frequency combination de-noising algorithm based on orthogonal frequency division multiplexing/offset quadrature amplitude modulation in power line communication system

ZHENG Jianhong^1,2, ZHANG Heng¹, LI Fei¹, LI Xiang¹, DENG Zhan¹

1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
2. Key Laboratory of New Generation Broadband Mobile Communication Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received:2017-07-14 Revised:2017-09-02 Online:2018-01-10 Published:2018-01-22
Supported by:
This work is partially supported by the National Science and Technology Major Project of China (2016ZX03002010-003).

摘要/Abstract

摘要： 针对电力线通信（PLC）系统中存在严重影响传输性能的脉冲噪声，传统的消噪算法大都不能有效抑制脉冲噪声的问题，提出一种时频结合的消噪算法。首先，通过选择合适的门限对时域接收信号中峰值较大的脉冲噪声进行检测和置零处理；然后，在频域根据已判决的符号来重构时域尚未消除完的峰值较小的脉冲噪声，并通过迭代来提高噪声重构的准确性；最后，从频域接收信号中减去重构的脉冲噪声。在电力线多径信道下进行仿真实验，相比传统的时域消噪和频域消噪算法，所提算法在误比特率为0.01时可以分别实现2 dB和0.5 dB的性能提升，而随着误比特率的降低，它们之间的性能差距将会更大。仿真结果表明，所提出的时频结合消噪算法能够提高电力线通信系统对脉冲噪声的抵抗能力。

关键词: 电力线通信, 脉冲噪声, 时频结合, 消噪算法, 多径信道

Abstract: Focusing on the issue that the impulse noise in Power Line Communication (PLC) system greatly affects the transmission performance, and most traditional de-noising algorithm can not effectively suppress the impulse noise, a time-frequency combination de-noising algorithm was proposed. Firstly, the impulse noise with large peak in the time domain received signal was detected and zeroed by selecting the appropriate threshold. Secondly, according to the symbols that had been decided in the frequency domain, the smaller impulse noise which had not eliminated in the time domain was reconstructed, and the accuracy of the noise reconstruction was improved by iteration. Finally, the reconstructed impulse noise was subtracted from the frequency domain received signal. Simulation experiments were conducted under the multipath channel of the power line. Compared with traditional time domain and frequency domain de-noising algorithms, the proposed algorithm could achieve the performance improvement of 2dB and 0.5dB respectively when the bit-error rate was 0.01. And as the bit-error rate decreased, the performance gap between them would be even greater. The simulation results show that the proposed time-frequency combination de-noising algorithm can improve the resistance of the PLC system to impulse noise.

Key words: Power Line Communication (PLC), impulse noise, time-frequency combination, de-noising algorithm, multipath channel

中图分类号:

郑建宏, 张恒, 李飞, 李想, 邓湛. 电力线通信系统中基于OFDM/OQAM的时频结合消噪算法[J]. 计算机应用, 2018, 38(1): 228-232.

ZHENG Jianhong, ZHANG Heng, LI Fei, LI Xiang, DENG Zhan. Time-frequency combination de-noising algorithm based on orthogonal frequency division multiplexing/offset quadrature amplitude modulation in power line communication system[J]. Journal of Computer Applications, 2018, 38(1): 228-232.

参考文献

[1] 国家电网公司.Q/GDW 374.3-2016低压电力线宽带载波通信技术规范,第41部分:物理层通信协议(报批稿)[S].北京:国家电网公司,2016:3-31.(State Grid Corporation. Q/GDW 374.3-2016 Technical specification for low voltage power line broadband carrier communication part 41:physical layer communication protocol (draft)[S]. Beijing:State Grid Corporation, 2016:3-31.)
[2] ACHAICHIA P, BOT M L, SIOHAN P. OFDM/OQAM:a solution to efficiently increase the capacity of future PLC networks[J]. IEEE Transactions on Power Delivery, 2011, 26(4):2443-2455.
[3] DANDACH Y, SIOHAN P. Design method of OFDM/OQAM systems using a weighted time-frequency localization criterion[C]//Proceedings of the 201018th European Signal Processing Conference. Piscataway, NJ:IEEE, 2010:70-74.
[4] RAZAVI R, XIAO P, TAFAZOLLI R. Information theoretic analysis of OFDM/OQAM with utilized intrinsic interference[J]. IEEE Signal Processing Letters, 2015, 22(5):618-622.
[5] ZIMMERMANN M, DOSTERT K. Analysis and modeling of impulsive noise in broad-band powerline communications[J]. IEEE Transactions on Electromagnetic Compatibility, 2002, 44(1):249-258.
[6] JUWONO F H, GUO Q, HUANG D, et al. Deep clipping for impulsive noise mitigation in OFDM-based power-line communications[J]. IEEE Transactions on Power Delivery, 2014, 29(3):1335-1343.
[7] PAPILAYA V N, VINCK A J H. Investigation on a new combined impulsive noise mitigation scheme for OFDM transmission[C]//Proceedings of the 2013 IEEE International Symposium on Power Line Communications and ITS Applications. Piscataway, NJ:IEEE, 2013:86-91.
[8] ANDO H, NAKAMURA A, OHNO K, et al. A study on channel estimation under class A impulsive PLC channel[C]//Proceedings of the 2013 IEEE International Symposium on Power Line Communications and ITS Applications. Piscataway, NJ:IEEE, 2013:69-74.
[9] ZHIDKOV S V. Impulsive noise suppression in OFDM-based communication systems[J]. IEEE Transactions on Consumer Electronics, 2003, 49(4):944-948.
[10] 陈孝武.脉冲成形OFDM/OQAM系统关键技术研究[D].杭州:浙江大学,2015:10.(CHEN X W. Research on key technology of pulse forming OFDM/OQAM system[D]. Hangzhou:Zhejiang University, 2015:10.)
[11] LIN H, SIOHAN P. OFDM/OQAM with hermitian symmetry:design and performance for baseband communication[C]//Proceedings of the 2008 IEEE International Conference on Communications. Piscataway, NJ:IEEE, 2008:652-656.
[12] 孙希东.OFDM/OQAM系统在瑞利信道下的信道估计与均衡方法[J].自动化技术与应用,2016,35(3):36-41.(SUN X D. Channel estimation and equalization method for OFDM/OQAM system in Rayleigh channel[J]. Automation Technology and Application, 2016, 35(3):36-41.)
[13] ABENOV R, POKAMESTOV D, GELTSER A. Multipath PowerLine Communications channel (PLC) modelling[C]//Proceedings of the 2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems. Piscataway, NJ:IEEE, 2015:1-4.
[14] ZIMMERMANN M, DOSTERT K. A multipath model for the powerline channel[J]. IEEE Transactions on Communications, 2002, 50(4):553-559.
[15] RABIE K M, ALSUSA E. Improving blanking/clipping based impulsive noise mitigation over powerline channels[C]//Proceedings of the 2013 IEEE International Symposium on Personal Indoor and Mobile Radio Communications. Piscataway, NJ:IEEE, 2013:3413-3417.
[16] CORTES J A, CANETE F J, DIEZ L, et al. On PLC channel models:an OFDM-based comparison[C]//Proceedings of the 2013 IEEE International Symposium on Power Line Communications and ITS Applications. Piscataway, NJ:IEEE, 2013:333-338.
[17] ZHIDKOV S V. Impulsive noise suppression in OFDM-based communication systems[J]. IEEE Transactions on Consumer Electronics, 2003, 49(4):944-948.

电力线通信系统中基于OFDM/OQAM的时频结合消噪算法

Time-frequency combination de-noising algorithm based on orthogonal frequency division multiplexing/offset quadrature amplitude modulation in power line communication system

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

[1]	李祝红, 赵灿明, 闫龙, 张信明. 智能电网中电力线通信网络负载均衡的机会路由协议[J]. 计算机应用, 2019, 39(3): 812-816.
[2]	高宝建, 王少迪, 胡云, 曹艳军. 基于正交频分复用调制的物理层并行插值加密算法[J]. 计算机应用, 2018, 38(6): 1628-1632.
[3]	杨强, 张天骐, 赵亮. 多径软扩频信号伪码周期盲估计[J]. 计算机应用, 2017, 37(7): 1837-1842.
[4]	杨昊, 陈雷霆, 邱航. 基于加权空间离群点度量的随机脉冲噪声降噪算法[J]. 计算机应用, 2016, 36(10): 2826-2831.
[5]	张洁玉王锋. 基于邻域信息的自适应中值滤波算法[J]. 计算机应用, 2014, 34(7): 2010-2013.
[6]	吴晓猛刘宏立李成谷志茹. G3-PLC前向纠错编码的性能分析与改进[J]. 计算机应用, 2013, 33(02): 393-396.
[7]	李世平陈方超王隆王爱红. 多径信道下基于循环谱特征的调制识别算法[J]. 计算机应用, 2012, 32(08): 2123-2127.
[8]	杨润玲周军妮魏蕊. 基于双阈值及迭代法的图像脉冲噪声检测算法[J]. 计算机应用, 2012, 32(07): 1885-1889.
[9]	刘新葛洪伟徐冰纯. 基于相似性噪声检测的边缘保护滤波算法[J]. 计算机应用, 2012, 32(03): 739-741.
[10]	何志勇朱忠奎. 脉冲噪声环境下基于卡尔曼滤波的语音增强[J]. 计算机应用, 2011, 31(12): 3441-3445.
[11]	万山李磊民黄玉清. 融合偏微分方程和中值滤波的图像去噪模型[J]. 计算机应用, 2011, 31(09): 2512-2514.
[12]	黄宝贵卢振泰马春梅赵景秀. 改进的自适应中值滤波算法[J]. 计算机应用, 2011, 31(07): 1835-1837.
[13]	李圣徐志强. 电力线通信系统中跨层的用户调度和资源分配[J]. 计算机应用, 2010, 30(10): 2656-2660.
[14]	王双双王士同李柯材. 基于加权检测的脉冲噪声新滤波器[J]. 计算机应用, 2010, 30(10): 2815-2818.
[15]	陆丽婷朱嘉钢. 基于svc和wavelet-transform的图像脉冲噪声自适应新滤波器[J]. 计算机应用, 2009, 29(2): 477-479.