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Relay transmission method applied to multiple access relay network

A relay network and transmission method technology, applied in the field of wireless communication, can solve the problems of inability to perform parallel decoding and high decoding complexity, and achieve the effect of achieving forwarding efficiency, low decoding complexity, and improving forwarding efficiency

Inactive Publication Date: 2013-11-06
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The existing joint channel-network coding decoding method is to jointly decode the received signal, the decoding complexity is relatively high, and it cannot be decoded in parallel, so how to design a simple decoding method is also currently to be solved a question of

Method used

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  • Relay transmission method applied to multiple access relay network
  • Relay transmission method applied to multiple access relay network
  • Relay transmission method applied to multiple access relay network

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Embodiment 1

[0065] Suppose the number of source nodes in the wireless multiple access relay network is N=4, and all source nodes and relay nodes use the same turbo encoder. The parameters of the turbo encoder refer to 3GPP TS36.212, and the length of the encoding sequence is L=1200, it is assumed that there are 2 source nodes S in the estimated information sequence of 4 source nodes decoded at the relay node 1 and S 3 The estimated information sequence is correct, and the relay transmission method of the present invention is adopted, and the specific implementation steps are as follows:

[0066] In step 1, the source node broadcasts the signal.

[0067] During time slot t, the source node S 1 ,S 2 ,S 3 ,S 4 first separately for their own original data Turbo coding is performed to obtain the respective coding sequences Then perform BPSK modulation on the respective coding sequences to obtain the respective modulation sequences Finally, through the orthogonal frequency division mu...

Embodiment 2

[0088] Suppose the number of source nodes in the wireless multiple access relay network is N=4, and all source nodes and relay nodes use the same turbo encoder. The parameters of the turbo encoder refer to 3GPP TS36.212, and the length of the encoding sequence is L=1200, it is assumed that there are 3 source nodes S in the estimated information sequence of 4 source nodes decoded at the relay node 1 ,S 2 and S 3 The estimated information sequence is correct, and the relay transmission method of the present invention is adopted, and the specific implementation steps are as follows:

[0089] Step 1, the source node broadcasts the signal

[0090] During time slot t, the source node S 1 ,S 2 ,S 3 ,S 4 respectively on their own raw data Turbo coding is performed to obtain the respective coding sequences Then perform BPSK modulation on the respective coding sequences to obtain the respective modulation sequences Finally, through the orthogonal frequency division multiple ...

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Abstract

The invention discloses a relay transmission method applied to a multiple access relay network and mainly solves the problems of low relay node forwarding efficiency and high destination node decoding complexity in the prior art. The method comprises the following implementation steps: N source nodes broadcast respective transmit signals to a relay node and a destination node; the relay node firstly carries out Turbo decoding on received signals, then judges if decoded estimation information sequences are correct, carries out Turbo coding and network coding modulation on the correct estimation information sequences and finally selects corresponding data from network coding modulation sequences to constitute transmitting sequences so as to complete the forwarding within a time slot; and a destination node respectively decodes signals corresponding to an error decoding set and a correct decoding set. The relay transmission method disclosed by the invention can be used for realizing effective compromise between the relay node forwarding efficiency and the destination node decoding performance, has the advantage of low complexity of decoding and can be applied to a wireless multiple access relay network.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to channel coding and network coding, and particularly relates to a relay transmission method for multiple access relay network, which can be used for wireless multiple access relay network. Background technique [0002] Using relay nodes to help mobile users to forward data can obtain additional diversity gain and improve the bit error BER performance of the receiving end. [0003] Existing wireless multiple access relay networks such as figure 1 shown. It consists of N (N≥3) source nodes, a relay node and a destination node. When its N source nodes communicate with the destination node by means of orthogonal frequency division multiple access with the help of a relay node, it usually needs N+1 time slots to complete the communication, that is, N source nodes occupy one time slot, The data is broadcast to the relay node and the destination node by means of orthogonal fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L27/20
Inventor 李颖孙岳梁鲁娟侯伟
Owner XIDIAN UNIV
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