Collaborative transmission method based on distributed interweaved and group encoding

Abstract

The invention relates to the field of wireless communication and aims to provide an encoding collaborative transmission method which is low in processing complexity, adaptive to collaborative network node number dynamic change and excellent in error correction performance. The method includes the steps of data transmission of information source nodes, distributed interweaved encoding forwarding of data of relay nodes and iterative decoding of a target node. In order to achieve the purposes, the technical scheme includes that the collaborative transmission method based on distributed interweaved and group encoding includes: executing M information source nodes S={S1, S2,...,SM} on a physical layer, and enabling the M information source nodes to collaboratively transmit information to the target node D with the help of K candidate relay nodes R={R1,R2,...,Rk}, wherein the target node refers to a base station or a sink node, has a high processing function and is further responsible for inquiry of relay node receiving states and control of relay node encoding, or inquiry and control are undertaken by an optional node of the information source nodes or the relay nodes according to practical network conditions. The collaborative transmission method based on distributed interweaved and group encoding is mainly applied to wireless communication.

Description

technical field [0001] A cooperative transmission method based on distributed interleaving and block coding belongs to the field of wireless communication, and in particular relates to a distributed coding cooperative transmission method applied to a wireless network including multiple information source nodes and relay nodes. Specifically, it relates to a cooperative transmission method based on distributed interleaving and block coding. Background technique [0002] With the rapid development of wireless networks, the number of nodes or users in the network continues to increase, various new wireless services continue to emerge, and the scope of use of wireless networks continues to expand. Therefore, performance indicators such as transmission rate and transmission reliability of communication systems put forward higher requirements. However, on the one hand, the development of wireless networks still faces great challenges due to limited wireless spectrum resources, lim...

AI Technical Summary

Problems solved by technology

However, both the traditional AF and DF relay methods have defects: in the AF relay protocol, the relay node amplifies the useful signal and also amplifies the noise introduced on the link; for the DF relay method, the fading and noise of the wireless channel may It leads to decoding errors in the relay node, and if the wrong data is forwarded to the destination node by the relay node, it will cause error propagation; and the traditional AF and DF protocols are based on repeated forwarding of the original data, and the utilization rate of system resources is low

On the one hand, due to the mobility of nodes, the source node or relay node participating in the cooperative communication at the current moment may leave the cooperative area and cannot continue to participate in the cooperation at the next moment, and the nodes that are not currently participating in the cooperation may also enter the collaborative area at the next moment. Therefore, the mobility of nodes will lead to random changes in the number of nodes participating in cooperative communication in the cooperative network system

On the other hand, due to the complexity of the wireless propagation environment, the communication link between nodes will be interrupted due to fading, noise or unexpected events, which will also lead to changes in the number of nodes participating in cooperative communication.

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