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Multiple access channel adaptive coding relay system and method

An adaptive coding and relay system technology, which is applied in the field of uplink multiple access relay access channels in wireless communication systems, can solve problems such as degrading system performance, failing to improve the transmission quality from the source node to the destination node, and unreliable wireless channels.

Active Publication Date: 2012-06-13
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

Due to the unreliability of the wireless channel, some errors will inevitably occur in the bit information transmitted by the source node recovered by the relay. If these erroneous bit information is further network coded and transmitted to the destination node, it will not only fail to improve the communication between the source node and the destination node. The transmission quality of the nodes will even further deteriorate the system performance

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  • Multiple access channel adaptive coding relay system and method
  • Multiple access channel adaptive coding relay system and method
  • Multiple access channel adaptive coding relay system and method

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Embodiment Construction

[0231] Specific embodiments of the present invention are given below, and the present invention is further described in conjunction with the accompanying drawings.

[0232] The purpose of the present invention is to propose a practical adaptive coding relay system and method for uplink multiple access relay access channel scenarios, so as to fully utilize the advantages of different methods in different scenarios and optimize system performance. Traditional hard-decision network coding schemes require completely correct reception of source information, thus requiring high relay link quality; while relay schemes based on soft bit information can only achieve relatively better results under low relay link quality environments. performance. There is no one method that can adapt to various scenarios and obtain excellent performance in various environments. Therefore, self-adaptation is particularly important and feasible in practical systems.

[0233] The relay does not make a h...

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Abstract

The invention discloses a multiple access channel adaptive coding relay system. The system is characterized by comprising a decoding verification module, an adaptive relay policy module and a receiving end signal processing module, wherein the decoding verification module decodes data received from a source node, performs cyclic redundancy check and analyzes an operation way; the adaptive relay policy module uses an adaptive relay policy according to the error state of received data and also comprises a relay policy module used for adopting a network coding relay policy, a repeated relay policy and / or a soft relay policy according to the error state and transmitting the data processed by the relay policy module to the receiving end signal processing module; the receiving end signal processing module is used for processing the data processed by the relay policy module by using a united network channel decoding policy, a distributive Turbo analogous decoding policy and / or a separated network channel decoding policy; and all the processing processes of data are operated by using soft bit information.

Description

technical field [0001] The invention relates to an uplink multiple access relay access channel of a wireless communication system, and designs an adaptive relay strategy, a corresponding relay method and an iterative decoding method for a destination node. Background technique [0002] In future wireless communication systems, relays will be used on a large scale to improve link transmission quality, improve network coverage and fairness among users. There are two main methods of traditional relay, Amplify-Forward (abbreviated as AF) and Decode-Forward (abbreviated as DF). Amplify-Forward is also called non-regenerative relay, and decode-forward is also called called regenerative relay. Amplification and forwarding only amplifies the received signal by a certain power factor and then forwards it to the destination node. It does not need to be decoded and restored. It is easy to operate and has good performance, but it also amplifies noise at the same time. Decoding and for...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04B7/14
Inventor 周一青周恩刘航石晶林史岗
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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