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Relay non-selective decoding and forwarding system and method for effectively reducing error spread

A kind of error diffusion, non-selective technology, applied in the field of relay non-selective decoding and forwarding, can solve problems such as waste of resources

Inactive Publication Date: 2014-10-22
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, even if the relay does not forward the signal due to a decoding error, the corresponding resource has been allocated by the base station and cannot be used by other transmissions, so the resource has to be wasted

Method used

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  • Relay non-selective decoding and forwarding system and method for effectively reducing error spread
  • Relay non-selective decoding and forwarding system and method for effectively reducing error spread
  • Relay non-selective decoding and forwarding system and method for effectively reducing error spread

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Embodiment Construction

[0063] Please refer to image 3 As shown, the relay non-selective decoding and forwarding system that effectively reduces error diffusion, the system includes a source end, a relay connected to the source end through a channel, and a terminal connected to the relay through a channel, the source end includes The coding module connected in sequence is used to channel code the information bits to generate coded bits; the rate matching module is used to puncture the coded bits to match the code rate adaptively selected according to the channel quality; the modulation module is used to The punctured encoded bits are mapped into complex symbols for the selected modulation;

[0064] The relay includes an equalization module connected in sequence, which is used to equalize the selected modulated complex symbols in the time domain and frequency domain; a demodulation and combining module, which is used to map the equalized complex symbols into binary coded bits or coded bits. Soft inf...

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Abstract

The invention provides a relay non-selective decode-and-forward method capable of effectively reducing error spread. The method is characterized by carrying out hard decision on all the coding bits after being decoded in stead of on information bits only when relay decoding is in error. Thus, no recoding is required in relaying, and speed matching and modulating are only carried out on the coding bits processed with hard decision according to the selected modulating coding format. The scheme provided by the invention can be applied to various relay systems for reducing the error spread of a decode-and-forward technology, and especially for improving the spectrum efficiency of a system under centralized scheduling.

Description

technical field [0001] The present invention relates to a relay non-selective decoding and forwarding method that effectively reduces the spread of errors proposed by the problem of serious error diffusion in the decoding and forwarding method of the relay system. The invention is applicable to various scenarios where there are relays, including Two-hop or multi-hop, cooperative relay or non-cooperative relay, transparent relay or non-transparent relay, etc. Background technique [0002] Relay technology has attracted widespread attention because of its ability to effectively increase coverage and enhance system throughput. Among the relaying and forwarding technologies extensively studied at present, the decoding and forwarding technology is one of the most important relaying and forwarding technologies. The relay using decoding and forwarding mainly performs equalization, demodulation, channel decoding, channel recoding, and remodulation on the received signal from the ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/18H04L25/03
Inventor 周婷徐景王芳王海峰
Owner SHANGHAI RES CENT FOR WIRELESS COMM