Transmitting node power distribution method in multicast network based on regenerated network coding

Abstract

The invention discloses an emergent nodal point power splitting method in multicast network which is based on regenerated network code in wireless communication technology filed. In the invention, as for information source terminals, two information sources s1, s2,at the same time, send broadcast signals to a relay, r and information sinks d1, d2 in a first time slot; the information sink d1 receives the signals from the information source s1 and the information sink d2 receives the signals from the information source s2; the relay r receives the aliasing signals of information sources s1 and s2; the information source power is split according to the known situations of counting channel information and instant s1 r and s2 r channel information; the relay node carries on the maximum likelihood decoding process to the aliasing signals sent by the two information sources in the first time slot; complex field totaling process is carried on to the two signals and the power is separately split for the known situations of counting channel information and instant s1 r and s2 r channel information. The method of the invention can reduce the transmission delay of the system to reduce the frame error rate of the system and improve the thruput of the system.

Description

technical field [0001] The invention relates to a method in the technical field of wireless communication, in particular to a method for allocating transmitting node power in a multicast network based on regenerative network coding. Background technique [0002] In a traditional wireless relay network, due to the limitation of the transmission power of the information source, the relay is generally used to expand the transmission range of the information source. In the wireless cooperative network proposed in recent years, the relay is used to increase the diversity gain of the source signal to reduce the error probability of information transmission. In these communication processes, after receiving the information from the source node, the relay node adopts the store-and-forward method without any data processing. At present, the network coding theory that appears in the computer network is an effective method that can significantly increase the network capacity. It impro...

AI Technical Summary

Problems solved by technology

The two-way information flow model and the multiple access model are the only two models of wireless network coding, but in the increasingly complex network environment, these two models are difficult to be widely used

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