A multi-relay selective polarization decoding and forwarding method based on channel statistics

Abstract

The invention discloses a multi-relay selective polarization decoding and forwarding method based on channel statistical characteristics, which includes steps: S1. Source node information broadcasting step: the source node sequentially performs channel polarization coding and modulation on the information bits to be transmitted , and then broadcast it to all relay and destination nodes in free space through the transmitting antenna; S2. The construction method of the candidate relay node set: select the candidate relay node set that can be correctly decoded; S3. The optimal relay node set Construction method: According to the current signal-to-noise ratio, among the above candidate relay node sets, select the optimal relay set that minimizes the probability of system interruption; S4. The method of judging whether the relay participates in cooperation: compare the above optimal relay node set and The performance related to the direct transmission link is used to judge whether the relay participates in the cooperation; S5. The destination node information receiving step: the destination node adopts the maximum ratio combination method to combine all the received information, and then demodulates and polarizes it to obtain the original information.

Description

technical field [0001] The invention relates to the technical field of digital communication, in particular to a multi-relay selection polarization decoding and forwarding method based on channel statistical characteristics. Background technique [0002] In recent years, in the field of wireless communication, multiple-input multiple-output (MIMO) systems gain performance gains through diversity and have received extensive attention and research in the industry. Collaborative communication is to allow users in the system to complete collaboration by relaying messages between each other to reach the destination. Doing so effectively forms a distributed antenna array that achieves the spatial diversity gain achieved by a centralized MIMO system. Commonly used relay methods for cooperative communication include: Amplify and Forward (AF), Decode and Forward (DF), Selective Relay (SR), Code Cooperation (CC) and Compression and Forward (CF). At present, the development trend of ...

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