Power optimization method for full-duplex two-way relay system at asymmetric rate

Abstract

The invention provides a power optimization method for a full duplex bidirectional relay system under asymmetrical speeds. The method comprises the following steps: step 1, a full duplex bidirectional relay communication system is established, and power distribution factors are initialized; step 2, state information of each node is measured, and the state information includes power of reception and transmission of each node, self-interference information of each node and channel coefficients during data exchange between the nodes; step 3, whether the power distribution factors need to be adjusted is determined according to the state information of the nodes and values of the power distribution factors, and the values of the power distribution factors are adjusted according to the determination result until an overall speed sum of the full duplex bidirectional relay communication system is the maximum; and step 4, power resources are distributed according to a power distribution scheme when the overall speed sum is the maximum. According to the invention, a relay cooperation communication mechanism in a full duplex mode is established; time slot cost is reduced; and the system throughput and transmission efficiency are increased.

Description

Technical field [0001] The present invention relates to the field of wireless communication, in particular to a power optimization method for a full-duplex two-way relay system under an asymmetric rate. Background technique [0002] With the rapid growth of user rate and business demand, the bandwidth required by wireless communication systems continues to increase, and the demand for spectrum resources is increasing rapidly, and the next-generation wireless communication technology 5G network is positioned for faster and larger capacity wireless The internet. The increase in data transmission rate and capacity is facing the bottleneck of spectrum resource shortage and the improvement of spectrum utilization efficiency. The key to breaking through the bottleneck is to introduce new air interface technology. The resource multiplexing technologies used in the existing wireless communication systems include Time Division Multiplexing (TDM) and Frequency Division Multiplexing (FDM, ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there is an optimization scheme that assumes that the transmit power of the two source nodes that interact with each other is the same, but this assumption is too restrictive and too idealistic, and in most cases the transmit power of the two source nodes is not equal , especially in asymmetric data rate business applications

And it is assumed that the sum of the transmit power of the source node and the relay node is constant, but in practical applications, the power settings of the three nodes are often very small, and the prerequisite for a certain total power is too far-fetched.

Both the source node and the relay node work in half-duplex mode, and the spectrum efficiency is not high

Or it is a scheme that only considers the single-duplex working model. This method needs to be limited by the fairness of the transmission rate of both parties. The constraint condition of equal rate is too far-fetched to be applied in the actual system.

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