Full-duplex energy harvesting relay transmission method based on self-interference minimization criterion

Abstract

The invention discloses a full-duplex energy collection relay transmission method based on the self-interference minimization criterion, comprising: acquiring information received by a destination terminal and a corresponding first signal-to-noise ratio; selecting a receiving antenna and a transmitting antenna of the relay; Obtain the signal received by the relay in the first time slot αT; obtain the signal received by the relay when the source information is transmitted through the relay in the second time slot (1‑α)T; obtain the signal received by the relay in the second time slot (1‑α)T In the slot (1‑α)T, when the source information is transmitted through the relay, the information received by the destination and the corresponding second signal-to-noise ratio; the destination adopts the maximum ratio combining technology to combine the information from the relay and the source, The receiving signal-to-noise ratio of the destination is obtained by summing the first signal-to-noise ratio and the second signal-to-noise ratio; and the instantaneous safety capacity and system throughput of the system are obtained based on the receiving signal-to-noise ratio of the destination. The simultaneous and same-frequency full-duplex technology of the present invention can nearly double the use efficiency of wireless resources, thereby significantly improving system throughput and capacity.

Description

technical field [0001] The invention relates to the field of wireless communication and physical layer security, in particular to a full-duplex energy collection and relay transmission method based on a self-interference minimization criterion. Background technique [0002] When the relay node is an energy-constrained node, that is, the relay has no stable energy source, or the energy source is not continuous, the relay node is easily interrupted. Considering the rapid development of energy collection technology and the ease of collection of RF signals, if the relay node can collect wireless RF signals, the service life of the wireless network can be extended. Recently, simultaneous wireless information and power transfer (SWIPT) has been proposed and widely used. However, in the traditional SWIPT system, the relay receiver is only equipped with a single antenna, and the relay working in the half-duplex mode collects the energy of the received signal and receives the inform...

AI Technical Summary

Problems solved by technology

However, in the traditional SWIPT system, the relay receiver is only equipped with a single antenna, and the relay working in the half-duplex mode performs energy collection and information reception on the received signal. When the required energy is required, the relay may be interrupted, and the information transmission will be terminated at this time

In addition, there are relays equipped with multiple antennas, which use full-duplex technology to forward information. However, large relay self-interference will seriously affect the performance of the system

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