End-to-end power distribution method and device and full duplex relay system

Abstract

The invention discloses an end-to-end power distribution method and device and a full duplex relay system, and belongs to the technical field of wireless communication, and the method comprises the steps: calculating the end-to-end interruption probability of an interruption performance parameter of the full duplex relay system under different self-interference elimination conditions; setting theratio of the relay transmitting power to the total transmitting power as a power distribution factor [beta]; based on the relationship between the end-to-end outage probability and the power distribution factor, taking the power distribution factor as an optimization variable, and constructing an optimization problem corresponding to the end-to-end reliability of the system; using a gradient descent optimization algorithm to iteratively solve the optimization problem to obtain a local optimal solution of the target function, and verifying the local optimal solution of the target function as aglobal optimal solution of the target function in combination with an analytical analysis method; and implementing power distribution of the full duplex relay system based on the global optimal solution of the target function. According to the power distribution method provided by the invention, the end-to-end interruption probability of the full duplex relay system can be reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and more specifically relates to an end-to-end power distribution method, device, full-duplex relay system and computer-readable storage medium. Background technique [0002] Cooperative relay technology can effectively improve the performance of the wireless communication system and extend its coverage. The decoding and forwarding relay scheme can eliminate the cumulative error, thereby reducing the impact of noise and interference at the relay. In the traditional cooperative communication system, the relay node usually 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 a waste of spectrum resources. Compared with half-duplex transmission, full-duplex realizes real simultaneous and same-frequency transmission, which can effectively improve spectrum utili...

AI Technical Summary

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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