Research on power line and wireless dual mode fusion transmission system

Abstract

At present, low voltage power meter reading system mainly has two modes, namely power line meter reading and wireless meter reading. Power line meter reading uses power line as communication medium for signal transmission, while wireless meter reading uses unauthorized frequency band, namely 470MHz to 510MHz frequency band. Either power line communication or wireless communication alone cannot meet the demand of power meter reading. Therefore, the power line and wireless heterogeneous network are used to realize the fusion of the two communication modes, and give full play to the advantages of the two communication modes. In this paper based on OFDM modulation technology of the physical system, sending data respectively through power line and wireless channel, the receiver is introduced three types of dual mode, and use maximum ratio combining in each mode, such as gain, choose the combining algorithm incorporates the power line and wireless channel data, so as to verify the dual-mode system performance advantages.