Research On The Discrete Narrow-band Private Networks Spectrum Sharing Technology Based On Hardware-in-the-loop Simulation

The development of intelligent distribution network will provide a strong guarantee to the development of the smart grid. In recent years, China’s distribution network construction investment is increasing and the development of distribution network has made significant achievements. With the innovation of new distribution network business, narrowband communications network cannot gradually meet the needs on bandwidth of the distribution network business. Discrete narrow-band private networks is the load distribution network in China’s main wireless network. Directly increasing discrete narrow-band private networks bandwidth allocation by solve the existing problem is obviously not realistic. This needs us not to change the existing discrete narrow-band private networks under the premise of spectrum division. We need to introduce new technology to improve the ability of discrete narrow-band private networks information transmission. Therefore, based on 230MHz band application scenario, the main research is to premise of supporting spectrum sharing and suitable for the signal modulation on discrete narrow-band private networks for spectrum sharing.This article first analyzes characteristics of the discrete narrow-band private networks, spectrum sharing technology, multicarrier modulation, then puts forward the suitable UFMC modulation mode on carrier aggregation of electric power 230 MHz discrete narrow-band private networks communications. We make every effort to replace the original single carrier modulation method and make full use of valuable spectrum, in order to improve the information transmission ability of discrete narrow-band private networks. Secondly, based on the demand of the discrete narrow-band private networks transmission performance, in order to reduce impact of the additive noise and carrier frequency on the discrete narrow-band private networks data transmission reliability of the system, we put forward the prototype filter design method based on three different filter, and analyze the influence of the three design on side-lobe spectrum characteristics of UFMC effective bandwidth signal distance of the edge from near to far, ultimately elect an optimal scheme from the three schemes. Finally, this article verifies the rationality and validity of the proposed scheme through reasonable design software simulation and hardware-in-the-loop simulation.