Adaptive power allocation method for wireless powered communication system

Abstract

The invention discloses an adaptive power allocation method for a wireless powered communication system. The method comprises the steps that channel state information and time slot allocation taut areinitialized; an energy access point carries out beam forming through utilization of the maximum ratio transmission technology and transmits energy beam to a data access point; and the data access point receives the energy beam of the energy access point, converts the energy beam into total transmission power, determines the number l of antennas in a transmission antenna subset according to powercontrol of antennas and the total transmission power, selects l transmission antennas with good data channel states as the transmission antenna subset, carries out equal power allocation on the transmission antenna subset and transmits required data to a wireless device through utilization of the maximum ratio transmission technology. According to the method, under the condition that power limitation exists in the antennas, adaptive allocation of the collected energy with randomness is realized, and utilization efficiency of the collected energy and reliability of the communication system areimproved.

Description

technical field [0001] The invention relates to the technical field of wireless power supply communication system and power distribution, in particular to an adaptive power distribution method of a wireless power supply communication system. Background technique [0002] WPT (Wireless Power Transfer) technology is a new power transmission method that uses electromagnetic waves as energy carriers to transmit power from the power source to the load without electrical contact. Compared with the traditional wire power transmission method, it has many advantages such as safety, reliability, and convenience, and is especially suitable for some special applications, such as equipment implanted in the human body, equipment in high-risk areas, and large-scale outdoor sensors. Because of the above advantages, infinite power transfer technology has received more and more attention and will be widely used in practice. [0003] WPCN (Wireless Powered Communication Networks, Wireless Pow...

AI Technical Summary

Problems solved by technology

However, in a general sense, the communication equipment in WPCN, except for EAP, does not have electrical energy storage equipment such as cable energy supply and battery, and completely relies on WPT technology to provide real-time energy, and the electrical energy that WPT can provide will be affected by the transmission energy. The influence of wireless channel state, with randomness

In addition, due to the limitation of the transmission power of the antenna, the received energy exceeding the limit can only be discarded, which leads to low power usage efficiency and poor communication performance

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