UDIF cooperation strategy and a JMC-TED detector for underwater acoustic cooperative communication

A JMC-TED, collaborative communication technology, applied in transmitter/receiver shaping network, digital transmission system, electrical components, etc., can solve the problem of large propagation delay of underwater acoustic channel

CN109818715AActive Publication Date: 2019-05-28HARBIN INST OF TECH AT WEIHAI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-05-28

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Abstract

The invention relates to the technical field of underwater acoustic cooperative communication systems, in particular to a UDIF cooperative strategy and JMC-suitable for a multi-user system and capableof saving end-to-end delay and used for underwater acoustic cooperative communication. The TED detector can still extract signals of the source node and the relay node according to different interleaving sequences even if interference exists between data packets, and meanwhile, the scheme can also reduce the end-to-end delay time; JMC-disclosed by the invention The TED detector combines the multiple branches to realize multi-branch combination; Turbo equalization and multi-user detection are carried out; The source node and the relay node use different interleaving sequences; therefore, the received signals cannot be directly combined; the signals are combined after de-interleaving processing; The combination coefficient is obtained on the basis of an output steady-state mean square error(SMSE) of each branch detector and is updated during each time of Turbo iterative processing, the method and the device can adaptively combine a plurality of received signals passing through different paths without knowing the CSI between the nodes, and are more suitable for an actual underwater acoustic cooperative communication system.
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Description

Technical field:

[0001] The invention relates to the technical field of underwater acoustic cooperative communication systems, in particular to a UDIF cooperative strategy for underwater acoustic cooperative communication and a JMC-TED detector suitable for multi-user systems and capable of saving end-to-end delay. Background technique:

[0002] Underwater acoustic cooperative communication (UACC, Underwater acoustic cooperative communication) is a promising physical layer solution that can improve the reliability of underwater acoustic communication links. However, the communication in the underwater environment has the characteristics of large propagation delay, multipath propagation and limited bandwidth, which brings new challenges to the realization of communication, making the technology designed for terrestrial wireless communication not suitable for underwater acoustic communication .

[0003] In underwater acoustic cooperative communication, the information sent by...

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0053] The present invention first proposes an underwater decoding interleave-forward (UDIF, Underwater Decode-Interleave-Forward) cooperation strategy for the underwater acoustic cooperative communication system, and then, for the proposed UDIF strategy, proposes a joint multi-branch combination ( MC, Multi-Branch Combining) and Turbo Equalization Detector (TED, TurboEqualization Detector), relay cooperation strategies and detectors are designed according to the characteristics of underwater acoustic channels.

[0054] The present invention first considers an asynchronous underwater acoustic collaborative network, such as figure 1 As shown, it consists of K source nodes S k (k=1,2,3,...,K), a UDIF relay node R and a destination node D, where, S 1 Under the cooperation of the relay node R, the information is transmitted to the destination node D, all ...