Optimal power distribution and relay deployment method of full duplex bidirectional decoding forwarding relay

Abstract

The present invention provides an optimal power distribution and relay deployment method of a full duplex bidirectional decoding forwarding relay based on a channel statistics characteristic. The method comprises the following steps of establishing a bidirectional full duplex relay communication system; using a terminal node to send the state information to a relay node, wherein the state information comprises the emission power information and the self-interference information; after the relay node receives the state information of the terminal node, selecting an optimal power distribution scheme to send a signal; and selecting the deployment position of the relay node according to an optimal power optimization scheme. According to the present invention, and according to a deployment mechanism of the relay node, a power distribution mechanism of the relay node enables the interruption probability of a system to be reduced effectively, the problem that the interruption probability is overhigh in a full duplex system is solved, and the stability of the system is improved, thereby improving the service quality of the terminal node.

Description

technical field [0001] The present invention relates to relay communication, in particular, relates to the optimal power allocation and relay deployment method of full-duplex bidirectional decoding and forwarding relay based on channel statistics. Background technique [0002] Relay communication belongs to the category of cooperative communication. It refers to a communication method that uses a relay node to assist communication when two terminal nodes cannot communicate directly due to strong fading, strong shadowing or long distance. Specifically: user A first sends the information to the relay node, and the relay node uses a forwarding protocol to complete the processing of the information, and then forwards it to user B. Relay communication can bring a series of benefits. In addition to expanding the coverage of communication mentioned above, it can also provide diversity gain, improve system stability, and reduce the probability of system interruption. The forwarding...

AI Technical Summary

Problems solved by technology

[0004] In the two-way full-duplex relay system, both the relay node and the user node work in the full-duplex state. Although increasing their own power can improve the signal strength of the receiving end, in the full-duplex mode, although the self-interference can be effectively eliminated, the Residual self-interference will greatly reduce the signal-to-noise ratio of the receiving end, affect the signal-to-noise ratio of the peer signal received by the device at the same time, reduce the system rate, increase the probability of system interruption, and seriously affect the stability of the system. How can the system be reduced? Outage probability is imperative

Therefore, it is necessary to consider appropriate power control, that is, to ensure that the transmitted signal has sufficient signal quality when it reaches the receiving end, and to avoid excessive transmission power that causes the received signal quality to be too large to be interfered

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