An end-to-end power distribution method, device, full-duplex relay system, and computer-readable storage medium

Abstract

The invention discloses an end-to-end power allocation method, device and full-duplex relay system, belonging to the technical field of wireless communication. The method includes: calculating the interruption performance parameters of the full-duplex relay system under different self-interference elimination conditions The end-to-end outage probability under the following; set the ratio of the relay transmission power to the total transmission power as the power allocation factor β; based on the relationship between the end-to-end outage probability and the power allocation factor, the power allocation factor is used as the optimization variable to construct the system The optimization problem corresponding to the end-to-end reliability performance; use the gradient descent optimization algorithm to iteratively solve the optimization problem to obtain the local optimal solution of the objective function, and combine the analytical analysis method to verify that the local optimal solution of the objective function is the global optimal solution of the objective function; based on the objective The function global optimal solution implements the power allocation of the full-duplex relay system. The power allocation method provided in this application can reduce the end-to-end outage probability of a full-duplex relay system.

Description

technical field [0001] The present invention belongs to the technical field of wireless communication, and more particularly, to an end-to-end power distribution method, an apparatus, a full-duplex relay system and a computer-readable storage medium. Background technique [0002] Cooperative relay technology can effectively improve the performance of wireless communication system and expand its coverage. The relay scheme of decoding and forwarding can eliminate accumulated errors, thereby reducing the influence of noise and interference at the relay. In the traditional cooperative communication system, the relay node mostly adopts the half-duplex working mode, that is, it occupies different time or frequency resources to realize the reception and forwarding of signals, but at the same time, it causes waste of spectrum resources. Compared with half-duplex transmission, full-duplex realizes true simultaneous co-frequency transmission, which can effectively improve spectrum uti...

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Problems solved by technology

[0003] The full-duplex relay system can improve communication efficiency, but the same-frequency signal received and sent by the relay node at the same time will be received by its own receiving antenna, which will cause loop self-interference, reduce communication quality, and affect system interruption performance

Although the current self-interference cancellation technology is relatively mature, it still cannot completely eliminate self-interference, and the self-interference at the relay node is closely related to the transmit power of the relay node

Furthermore, for the entire system, if the transmit power of the relay is too small, the sink cannot successfully decode the received signal, resulting in an increase in the decoding interruption probability of the relay-sink link; on the contrary, if the transmit power of the relay is too large, Then the loop self-interference enhancement affects the relay decoding performance, making the source-relay link interruption probability increase

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