Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Impacts of impulsive noise from partial discharges on wireless systems performance: application to MIMO precoders | Madi et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 186 EURASIP Journal on . http content 2011 1 i86 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access Impacts of impulsive noise from partial discharges on wireless systems performance application to MIMO precoders 1 3 1 2 1 1 Ghadir Madi Fabien Sacuto Baptiste Vrigneau Basile L Agba Yannis Pousset Rodolphe Vauzelle and Frangois Gagnon3 Abstract To satisfy the smart grid electrical network communication systems in high-voltage substations have to be installed in order to control equipments. Considering that those substations were not necessarily designed for adding communication networks one of the most appropriate solutions is to use wireless sensor network WSN . However the high voltage transported through the station generates a strong and specific radio noise. In order to prepare for such a network the electromagnetic environment has to be characterized and tests in laboratories have to be performed to estimate the communication performances. This paper presents a method for measuring the noise due to high voltage and more particularly the impulsive noise. In the laboratory we generate the impulsive noise using two specimens and we show that these laboratory measurements validate the field measurements of Pakala et al. For the two specimens it aims to link the noise characteristics magnitude and frequency with the specimen parameters power supply and geometric dimensions to predict the environments where wireless communications can be troublesome. By using different sets of this measured noise we show that the statistical model of Middleton Class A can be used to model the impulsive noise in high-voltage substations better than the Gaussian model. We consider a cooperative multiple-input-multiple-output MIMO system to achieve the wireless sensor communication. This system uses recent MIMO techniques based on precoding like .
