Abstract
In order to improve the transmission rate performance of precoding channel, this paper combines wireless power supply communication network and MU-MIMO to build WPCN-MU-MIMO system. Based on the energy transmission slot allocation characteristics of wireless power supply communication network technology, the precoding is optimized by using slot allocation. Due to the limitation of antenna array dimension and traditional power supply equipment, in order to solve the problem of precoding performance limitation caused by power supply, this paper considers that the time slot and power are linear in wireless power supply communication network technology, and the power and signal-to-noise ratio and channel transmission rate are also linear in MU-MIMO system, so WPCN-MU is combined with wireless power supply communication network technology and MU-MIMO system- The channel transmission rate performance and time slot conversion of MIMO system are convex functions. Considering that the channel capacity and time slot of WPCNMU-MIMO system are concave functions, it is proved that the optimization of WPCN-MU-MIMO precoding belongs to the optimal result in a certain time slot interval. Simulation results verify the correctness of channel transmission rate optimization through slot allocation in WPCN-MU-MIMO system.
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