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Low-density parity check code-based relay cooperative transmission method

A low-density check code and cooperative transmission technology, which is applied in the field of wireless communication relay network applications, can solve the problems of large resource consumption and low relay forwarding efficiency, and achieve simple transmission methods, reduced implementation complexity, and novel design Effect

Inactive Publication Date: 2010-09-08
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a low-density check code-based relay cooperative transmission method for the above-mentioned deficiencies in the prior art, which has a novel design, simple transmission method and good use effect, and further improves the receiving end performance, which effectively solves practical problems such as low relay forwarding efficiency and large resource consumption in existing wireless communications

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  • Low-density parity check code-based relay cooperative transmission method
  • Low-density parity check code-based relay cooperative transmission method
  • Low-density parity check code-based relay cooperative transmission method

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Embodiment 1

[0052] The (7,4) Hamming code is used for encoding, and the number of source nodes 1 described in this embodiment is 2, and the 2 source nodes 1 are respectively S 1 , S 2 . In actual use, when the present invention is used for relay cooperative transmission, the following steps are included:

[0053] Step 1. Use (7, 4) Hamming codes to source node 1, that is, S 1 , S 2 The sequence of information to be sent u 1 ={a 1 , a 2 , a 3 , a 4} and u 2 ={b 1 , b 2 , b 3 , b 4} for encoding to obtain two encoding sequences c 1 = { c 1 1 , c 1 2 , . . . , c 1 7 } and c 2 = { c 2 1 , c 2 2 ...

Embodiment 2

[0061] In this embodiment, the number of source nodes 1 is 2, and the 2 source nodes 1 are respectively S 1 , S 2 . Step 1, use the LDPC codes of (22164, 11082) to respectively pair the source node 1, namely S 1 , S 2 The information sequence u 1 =(u 1，1 , u 1，2 ,...,u 1，11082 ) and u 2 =(u 2，1 , u 2，2 ,...,u 2，11082 ) coding, get two coding sequences c 1 =(c 1，1 , c 1，2 ,...,c 1，22164 ) and c 2 =(c 2，1 , c 2，2 ,...,c 2，22164 ).

[0062] Step 2, both source nodes 1 use BPSK modulation to code sequence c 1 =(c1，1 , c 1，2 ,...,c 1，22164 ) and c 2 =(c 2，1 , c 2，2 ,...,c 2，22164 ) for modulation, the modulation sequence x 1 =(x 1，1 , x 1，2 ,...,x 1，22164 ) and x 2 =(x 2，1 , x 2，2 ,...,x 2，22164 ) broadcast to relay node 2 and destination node 3.

[0063] Step 3, the relay node 2 receives the y 1R =(y 1，1 ,y 1，2 ,...,y 1，22164 ) and y 2R =(y 2，1 ,y 2，2 ,...,y 2，22164 ) decoding, and get the information estimation sequence 1 of the two sourc...

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Abstract

The invention discloses a low-density parity check code-based (LDPC) relay cooperative transmission method. The method comprises the following steps of: firstly, performing LDPC encode processing on a source node; secondly, performing BPSK modulation processing on the source node and transmitting the result to a relay node and a destination node, namely, a base station; thirdly, decoding the relay node; fourthly, performing joint encoding processing on the relay node and correspondingly acquiring a plurality of joint encoding sequences and a plurality of corresponding check bit sequences; fifthly, performing joint modulation processing on the relay node and transmitting a plurality of check bit modulation sequences acquired by the joint modulation to the destination node; and finally, performing joint decoding processing on the destination node. The transmission method has the advantages of improving the performance of a receiving end and effectively solving the actual problems of low relay forwarding efficiency, high resource consumption and the like in the traditional wireless communication, along with novel design, simple implementation and good using effect.

Description

technical field [0001] The invention belongs to the application technical field of a wireless communication relay network composed of multiple source nodes and a relay node, and in particular relates to a relay cooperative transmission method based on a low-density check code. 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. [0003] When multiple users access a relay station at the same time, if the traditional relay method is used to forward data for each user one by one, the forwarding efficiency of the relay station will be reduced, or the relay will consume more resources, which will affect the system throughput instead. important bottleneck. Network coding can improve network throughput, reduce the number of data packet transmissions, and en...

Claims

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Application Information

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IPC IPC(8): H04L1/00
Inventor 李颖侯伟孙岳
Owner XIDIAN UNIV
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