智能电网窄带OFDM通信系统噪声抑制

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Abstract Performance of the narrowband power line communication(PLC) is significantly degraded by high noise on low frequency power line channel. To stationary background noise and time-variant impulsive noise,different noise suppression(NS) methods were proposed. In practical applications,the simple memoryless nonlinearity techniques are often used in order to mitigate the effect of the impulsive noise. Background noise has Gaussion distribute characteristic,in-phase and quadrature components of OFDM symbols meet a linear model. So Karhunen-Loeve transform(KLT) is used to decompose the vector space of the noisy signal into a signal-plus-noise subspace and a noise subspace,exploiting Lagrange multipliers and minimum signal distortion criterion,we derived the linear estimate method of OFDM symbols. Based on the distribution of measurement,a Non-Gaussian model of narrow-band power line noise was derived; according to Physical Layer of G3-PLC,OFDM simulation system was built. Performance Compare before and after NS of OFDM system show the proposed NS approach can improve BER and SNR.

Key words： Power line communication smart grid orthogonal frequency division multiplexing noise suppression KLT

Received: 13 June 2014 Published: 22 January 2015

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TM73

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	Gu Zhiru
	Liu Hongli
	Zhan jie
	Liu Shugang
	Tan Zhouwen

Cite this article:

Gu Zhiru,Liu Hongli,Zhan jie等. Noise Suppression Investigation of a Narrowband Power Line Communication for Smart Grid[J]. Transactions of China Electrotechnical Society, 2014, 29(11): 269-276.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I11/269

[1] Galli S,Scaglione A,Wang Z. For the grid and through the grid: the role of power line communications in the smart grid[J]. Proceedings of the IEEE,2011,99(6): 998-1027.
[2] Javier M,Sadot A,Rodriguez Morcillo C. Performance evaluation of two narrowband PLC systems: PRIME and G3[J]. Comput Stand Inter,2013,36(1): 198-208.
[3] 张有兵,翁国庆,曹一家. 网络化电能质量监测系统中的配电线载波通信[J]. 电工技术学报,2010,25(6): 116-122. Zhang Youbing,Weng Guoqing,Cao Yijia. Distribution line carrier communication in networked power quality monitoring system[J]. Transactions of China Electrotechnical Society,2010,25(6): 116-122.
[4] Zimmermann M,Dostert K. A multipath model for the power line channel[J]. IEEE Transaction on Communication,2002,50(4): 555-559.
[5] Gotz M,Rapp M,Dostert K. Power line channel characteristics and their effect on communication system design[J]. IEEE Communications Magazine,2004,42(4): 78-86.
[6] Andreadou N,Pavlidou F N. Modeling the noise on the OFDM power-line communication system[J]. IEEE Transaction on Power Delivery,2010,25(1): 150-157.
[7] Linyu W,Gustavo A,Geert D. Estimation of multi-conductor power line cable parameters for the modeling of transfer characteristics[J]. IET Science Measurement & Technology,2014,22(1): 39-45.
[8] Zimmermann M,Dostert K. Analysis and modeling of impulsive noise in broad-band powerline communica- tions[J]. IEEE Transactions on Electromagnetic Compatibility,2002,44(1): 249-258.
[9] Tan Tanhsu,Huang Sanyuan. Optimizing markov model parameters for asynchronous impulsive noise over broadband power line communication network[J]. IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences,2008,E91- A(6): 150-157.
[10] Noriaki lshida. On carrier pulse transmission systems with the modified cosine roll-off characteristics[J]. Electronics and Communications in Japan(PartⅠ: Communications),2003,86(3): 17-25.
[11] Korki M,Hosseinzadeh N. Performance evaluation of a narrowband power Line communication for smart grid with noise reduction technique[J]. IEEE Transac- tions on Consumer Electronics,2011,57(4): 1598-1606.
[12] Kim Y,Nam Bae J,Young Kim J. Performance of power line communication systems with noise reduction scheme for smart grid applications[J]. IEEE Transactions on Consumer Electronics,2011,57(1): 46-52.
[13] Ephraim Y,Van Trees H L. A signal subspace approach for speech enhancement[J]. IEEE Transactions on Speech and Audio Processing,1995,3(4): 251- 266.
[14] Hu Y,Loizou P. A Generalized subspace approach for enhancing speech corrupted by colored noise[J]. IEEE Transactions on Speech and Audio Processing,2003,11(4): 334-341.
[15] Razazian K,Umari M,Kamalizad A,et al. Navid. G3-PLC specification for Powerline communication: overview,system simulation and field trial results[C]. IEEE International Symposium on Power Line Communications and its Applications (ISPLC),2010: 313-318.
[16] 刘明骞,李兵兵,唐宁洁,等. 认知无线电中OFDM信号信噪比盲估计[J]. 通信学报,2011,32(11): 78-84. Liu Mingqian,Li Bingbing,Tang Ningjie,et al. Blind SNR estimation for OFDM signals in cognitive radio [J]. Journal on Communications,2011,32(11): 78-84.