Cooperative communication receiving method, device and system

Abstract

Embodiments of the present invention discloses a method of receiving collaborative communication, comprising: demodulating the signal transmitted by the first source received, obtaining a first log likelihood ratio; demodulating the signal transmitted by the second source received, obtaining a second log likelihood ratio; demodulating the signal transmitted by the received relay node to obtain a third log likelihood ratio; the signal transmitted by the relay node is a signal transmitted by the first source end and the signal transmitted by the second source after network encoding; based on the heterogeneity or characteristics of the network coding, The first logarithmic likelihood ratio, the second log likelihood ratio and the third logarithmic likelihood ratio are processed to obtain the posterior log likelihood ratio of the first source, and the posterior logarithmic likelihood ratio of the first source is used to decode the signal transmitted by the first source received. Embodiments of the present invention further discloses a receiving device and system for collaborative communication, through the above technical solutions, the network encoding is fully utilized to obtain diversity gain, improving system performance.

Description

technical field [0001] The present invention relates to the communication field, in particular to a receiving method, device and system for cooperative communication. Background technique [0002] The idea of ​​cooperative communication originally comes from relay communication, which means that users and other relay nodes cooperate to transmit information to ensure communication between users and destination nodes. The next-generation network architecture based on relays has become a current research hotspot. Through cooperative transmission technology, it can not only support direct communication between the source node and the destination node, but also introduce one or more relay nodes to make the source node send The information can also be processed by each relay node in a certain way and then forwarded to the destination node. This multi-hop transmission method bypasses obstacles such as buildings that hinder radio wave transmission, overcomes the influence of large-...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing technical solution combining network coding and cooperative communication, the receiving end uses the estimated value obtained by decoding the received signal to perform network decoding, so if the estimated value of the receiving end has more than one error, it will fail to pass The network decoding correctly outputs the received information

In the existing technical solutions, network coding is not fully utilized to obtain diversity gain, and the system performance is not high

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