Asynchronous space-time code coding/decoding system and method in full-duplex cooperative communication system

Abstract

The invention discloses an asynchronous space-time code coding / decoding system and method in a full-duplex cooperative communication system, in order to mainly solve the problem of self loop interference of a relay node in full-duplex cooperative communication in the prior art. The system comprises a channel estimation module, a source node signal estimation module, an interference offset module, a signal amplifying module, an equivalent channel generation module and a minimum mean square error decoding module; after the interference offset module eliminates the relay loop interference signal by utilizing the channel information input by the channel estimation module and the estimation signal input by a source node signal estimation module, and the signals are amplified through the signal amplifying module, and then output through the channel to the equivalent channel generation module and the minimum mean square error decoding module; and the minimum mean square error decoding module decodes and recovers the source node signal by utilizing the equivalent channel information input by the equivalent channel generation module. According to the invention, the frequency spectrum efficiency and reliability of the full-duplex cooperative communication are improved, and an asynchronous cooperative full mark set can be obtained when partial loop interference is eliminated.

Description

technical field [0001] The invention belongs to the field of communication technology, relates to asynchronous space-time code technology, in particular to an asynchronous space-time code encoding and decoding system and method for a full-duplex cooperative communication system, which can be used in a distributed cooperative transmission system of wireless mobile communication in the future. Background technique [0002] In the cooperative communication system, by using multiple relay nodes to forward the signal of the source node, the spatial diversity gain similar to that of the MIMO system can be obtained, which we call cooperative diversity. When the processing delays of the relay nodes are different, the cooperative diversity gain can be obtained through asynchronous cooperative space-time coding. The working mode of the relay node is divided into half-duplex HD mode and full-duplex FD mode. When the relay node adopts the half-duplex HD mode, the relay node can only be ...

AI Technical Summary

Problems solved by technology

The disadvantage of the above method is that the proposed asynchronous space-time coding scheme is suitable for half-duplex cooperative communication systems, but cannot be applied to full-duplex cooperative communication systems

The disadvantage of the above method is that in the full-duplex cooperative system, the loop signal is directly eliminated as interference, and the loop signal is not effectively utilized.

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