Phase shift and time design method in multi-IRS auxiliary power supply system

• Main Author: TIAN XINJI
• Format: Patent
• Language: Chinese; English
• Published: 07.04.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; WIRELESS COMMUNICATIONS NETWORKS

The invention discloses a phase shift and time design method in a multi-IRS auxiliary power supply system. The method is suitable for a multi-IRS auxiliary single-cluster single-antenna NOMA WPCN system. The method comprises the following steps: firstly, constructing an optimization problem for maximizing system throughput, wherein optimization parameters are time and IRS phase shift; then, constructing an IRS phase shift optimization problem; secondly, obtaining an IRS phase shift of the sum of maximum equivalent channel gains by solving an equation set; and finally, under the condition that the IRS phase shift is known, the optimal time distribution is found out by adopting a function extremum method. 本发明公开了一种多IRS辅助供电系统中相移和时间的设计方法，适用于多IRS辅助的单簇单天线NOMA WPCN系统。首先构建最大化系统吞吐量的优化问题，优化参数为时间和IRS相移；然后，构建IRS相移优化问题；其次，通过解方程组得到最大化等效信道增益之和的IRS相移；最后，在已知IRS相移的情况下，采用函数极值法找出最优的时间分配。