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Network coding method based on Turbo decoding

A network coding and coding technology, which is applied in the field of wireless communication network and network coding, can solve the problem that it is impossible to directly promote the source node to adopt Turbo code and low-density check code.

Inactive Publication Date: 2010-03-17
LISHUI BOYUAN TECH CO LTD
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  • Claims
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Problems solved by technology

[0005] The method given in the above literature is only applicable to the case where the source node adopts the regular repeated accumulation code, and cannot be directly extended to the case where the source node adopts Turbo code and low-density check code

Method used

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  • Network coding method based on Turbo decoding
  • Network coding method based on Turbo decoding
  • Network coding method based on Turbo decoding

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Experimental program
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Embodiment 1

[0107] Step 1: Encode the first source node with a Turbo code whose two component code generator polynomials are both 1 / 1+D, and both component code generator polynomials are 1+D 2 / 1+D+D 2 The Turbo code encodes the second source node to obtain the coded sequence, and sends the coded sequence to the relay node at the same time.

[0108] Step 2, the generator polynomial 1 / 1+D of the first component code of the Turbo code of the first source node, and the generator polynomial 1+D of the first component code of the Turbo code of the second source node 2 / 1+D+D 2 , constructing the generator polynomial of the first joint component code as 1 / 1 + D 0 0 1 + D ...

Embodiment 2

[0124] Step 1, using two component code generator polynomials are 1+D 2 / 1+D+D 2 The Turbo codes encode the two source nodes respectively, and send the encoded sequences to the relay node at the same time.

[0125] Step 2, from the generator polynomial 1+D of the first component code of the Turbo code of the first source node 2 / 1+D+D 2 , the generator polynomial 1+D of the first component code of the Turbo code of the second source node 2 / 1+D+D 2 , constructing the generator polynomial of the first joint component code as 1 + D 2 / 1 + D + D 2 0 0 1 ...

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Abstract

The invention discloses a network coding method based on Turbo decoding, which belongs to the technical field of wireless communication and mainly solves the problems of limited network throughput andlow forwarding efficiency of a relay node in a wireless communication network. The invention designs a network coding method under the two conditions of adopting different Turbo codes and same Turbocodes by a source node, which comprises the following steps: simultaneously transmitting the Turbo coded information to the relay node by the two source nodes and constructing a virtual Turbo code bydesigning a Trellis figure on the source node adopting different Turbo codes and designing a virtual simplified Trellis figure on the source node adopting same Turbo codes; carrying out maximum likelihood decoding on the virtual Turbo code to obtain the network coding information of the information of the two source nodes; recoding and broadcasting the network coding information to the source nodes and obtaining the information of the counterpart source node by the two source nodes according to decoding information and local information. The invention has the advantages of high network throughput and forwarding efficiency of the relay node and can be applied to the wireless network communication.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to channel coding and network coding, and specifically aims at a wireless communication network with two source nodes and a relay node, and designs a network coding method capable of improving network throughput and bit error performance . Background technique [0002] Using relays to help mobile users forward data can obtain additional diversity gain and improve the bit error BER performance of the receiving end. It is one of the effective means to improve the call quality of mobile users at the edge of the cell. against figure 1 In the shown wireless two-way relay channel, when two source nodes exchange information through a relay node, four time slots are usually required, that is, two source nodes occupy one time slot to communicate with the relay node, and the relay node occupies Two time slots, forwarding data for two source nodes respectively. [0003] Network cod...

Claims

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Application Information

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IPC IPC(8): H03M13/25H03M13/27H03M13/29
Inventor 路姗李颖孙岳
Owner LISHUI BOYUAN TECH CO LTD
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