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Communication method based on fountain codes and physical layer network coding

A network coding and communication method technology, applied in the communication field based on fountain codes and physical layer network coding, can solve the problems of wasting system bandwidth resources, reducing spectrum utilization, reducing transmission efficiency, etc., so as to improve channel transmission efficiency and network Throughput, the effect of improving transmission efficiency

Inactive Publication Date: 2016-06-01
PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, ARQ technology will not only reduce spectrum utilization, but when the number of users increases on a large scale, a large number of feedback signals will also cause channel congestion; FEC technology will reduce transmission efficiency and waste system bandwidth resources

Method used

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  • Communication method based on fountain codes and physical layer network coding
  • Communication method based on fountain codes and physical layer network coding
  • Communication method based on fountain codes and physical layer network coding

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] refer to figure 1 , the communication model of the embodiment is used to illustrate the principle of the physical layer network coding technology based on Raptor codes, and the specific steps of the communication method of the embodiment are as follows:

[0025] Step 1: Source node A and source node B generate data packets in the first time slot (that is, the multiple access phase) b A and b B ,data pack b A and b B The signals are encoded by Raptor code encoder respectively x A and x B ; Source node A and source node B use their respective antennas to transmit the signal x A and x B transmit to the relay node, specifically, the signal x A and x B Sent to the relay node via the binary erasure channel.

[0026] In step 1, the encoding process of the Raptor code is as follows figure 2 As shown, source node A and source node B generate packets b ...

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PUM

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Abstract

The invention relates to the wireless communication technical field, specifically relates to a communication method based on fountain codes and physical layer network coding. In adoption of the method of the invention, the performance of a wireless communication system can be further improved; the network throughput of the communication system can be improved; the bit error rate of the communication system can be reduced; and the problems such as reducing the spectral efficiency, channel congestion and reducing the transmitting efficiency resulted from enhancing the communication reliability in an ARQ (Automatic Repeat Request) or FEC (Forward Error Correction) technique can be avoided. According to the communication method of the invention, Raptor coding is carried out to source node signals at a first time slot; Raptor decoding and physical layer network coding are carried out to mixed signals at a second time slot; broadcasting is carried out; finally each source node is reduced; the signals of the opposite side nodes are obtained; and therefore, the information interaction is finished.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a communication method based on fountain codes and physical layer network codes. Background technique [0002] The traditional transmission mode believes that the relay node only stores and forwards the information, but does not process the information. Based on the purpose of making full use of superimposed electromagnetic waves in wireless communication, Zhang proposed Physical layer network coding (Physical layer network coding, PNC for short) in 2006. The relay node of this technology maps the mixed signal sent by the source node simultaneously to a Galois field (GF( 2)) of the data bitstream, making interference part of the encoding operation. Compared with the traditional transmission mode, the physical layer network coding reduces the information exchange time slot by half and doubles the network throughput, but the bit error rate increases. [0003] When ...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04W28/02H04B7/155
CPCH04L1/0078H03M13/3761H04B7/15592H04L1/0056H04W28/0268
Inventor 胡永江袁全盛王长龙赵伟策
Owner PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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