Relay transmission method applied to multiple access relay network

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

Inactive Publication Date: 2011-11-16
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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] Assuming that 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 TS 36.212, and the length of the encoding sequence is L = 1200, assuming that there are 2 source nodes S in the estimated information sequence of 4 source nodes obtained by decoding at the relay node 1 and S 3 The estimated information sequence of is correct, using the relay transmission method of the present invention, the specific implementation steps are as follows:

[0066] Step 1, the source node broadcasts the signal.

[0067] In time slot t, the source node S 1 , S 2 , S 3 , S 4 First, separate your own original data Perform Turbo encoding to obtain their respective coding sequences Then perform BPSK modulation on the respective coding sequences to obtain the respective modulation sequences Finally, the modulation sequence is broadcast to the r...

Embodiment 2

[0086] Assuming that 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 coder, the parameters of the Turbo coder refer to 3GPP TS36.212, and the length of the coded sequence is L=1200, suppose there are 3 source nodes S in the estimated information sequence of 4 source nodes obtained by decoding at the relay node 1 , S 2 and S 3 The estimated information sequence of is correct, using the relay transmission method of the present invention, the specific implementation steps are as follows:

[0087] Step 1, the source node broadcasts the signal

[0088] In time slot t, the source node S 1 , S 2 , S 3 , S 4 their own raw data Perform Turbo encoding to obtain their respective coding sequences Then perform BPSK modulation on the respective coding sequences to obtain the respective modulation sequences Finally, the modulation sequence is broadcast to the relay node R and the destinatio...

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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, and relates to channel coding and network coding, in particular to a relay transmission method for multiple access relay networks, which can be used for wireless multiple access relay networks. Background technique [0002] Using relay nodes to help mobile users forward data can obtain additional diversity gain and improve the bit error BER performance of the receiving end, which is one of the effective means to improve the call quality of mobile users at the edge of the cell. [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 using OFDMA 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. Orthogonal frequency division multiple ...

Claims

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Application Information

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