Wireless relay communication system SWIPT (Simultaneous Wireless Information and Power Transfer) method

Abstract

The invention discloses a wireless relay communication system SWIPT (Simultaneous Wireless Information and Power Transfer) method. The time and power distribution scheme of a wireless power supply relay communication system under the requirements of certain service quality and interrupt performance saves the time and energy resources, and is suitable for wireless communication. When the system is in operation, a transmitting end transmits energy and signals to a relay network. After given time, the relay network decodes the received signals and transmits the signals to a receiving end through employing a part of received energy. Through a derived system interrupt probability progressive expression and a simulation result in a flat Rayleigh fading channel, the method designs the distribution of time and power factors. The method can remarkably save the time and energy resources.

Description

technical field [0001] The invention relates to the technical field of a relay transmission system with wireless energy collection, in particular to a method that can save energy and time resources and improve its stability. Background technique [0002] The relay communication with wireless power supply is a new network mode, in which the battery of the wireless communication device can perform remote supplementary technology (WPT) through the microwave wireless power transmission device, and the relay network receives the energy by a given power allocation factor with A certain amount of energy decodes and forwards the received signal (DF), and the remaining energy is stored in the relay network. The DF relay network has been deeply researched recently and adopted various standards, such as IEEE's 802.16j and LTE-A to further Improve coverage. Wireless Powered Communications Network (WPCN) reduces the hassle of frequent manual battery replacement and charging, and has hig...

AI Technical Summary

Problems solved by technology

Compared with traditional energy harvesting, for example, using renewable energy, because renewable energy is mostly random and time-varying, it is impossible to achieve on-demand energy demand to supply to the device

These obvious advantages of WPT compared to traditional energy supply methods make WPCN a promising new model, but it is undeniable that WPCN also brings great challenges. Energy transfer requires more complex system design, and building efficient WPCN in practice It is a challenging problem. On the one hand, due to the attenuation of power with distance, the received energy can be very low. This energy near-far effect can lead to unfairness among users in different locations; on the other hand, in WPCN The design of joints for energy transmission is necessary. First, wireless energy and information transmission are often related. For example, WPT needs to harvest enough energy before a device transmits data. Second, energy transfer shares spectrum and communication channel, which may cause Co-channel interference to concurrent information transmission

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