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Communication method based on LDLC (Low Density Lattice Code) and physical layer network coding

A network coding and communication method technology, applied in wireless communication, network traffic/resource management, sustainable communication technology, etc., can solve the problem of high decoding complexity, and achieve the goal of strengthening the transmission ability, reducing the bit error rate, and improving the network throughput. amount of effect

Inactive Publication Date: 2016-06-15
PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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Problems solved by technology

Studies have shown that in the joint design scheme of physical layer network coding and Turbo code (PNC-Turbo), by performing Turbo coding and decoding at each node, compared with the physical layer network coding scheme without channel coding, it has achieved better results. 4.5dB performance gain, but because two SISO (soft-inputsoft-output) decoding modules are required for Turbo code decoding, the decoding complexity is high

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  • Communication method based on LDLC (Low Density Lattice Code) and physical layer network coding
  • Communication method based on LDLC (Low Density Lattice Code) and physical layer network coding
  • Communication method based on LDLC (Low Density Lattice Code) and physical layer network coding

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing.

[0021] 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 LDLC, and the specific steps of the communication method of the embodiment are as follows:

[0022] Step 1: Source node A and source node B generate a bit sequence in the first time slot (ie, the multiple access phase) b A and b B . bit sequence b A and b B The signals are obtained through the LDLC encoder respectively c A and c B , see the specific encoding process figure 2 . In the LDLC encoding process, the shaping operation is to minimize the signal transmission power, and the shaping method adopts the hypercube shaping method; the Gauss-Seidel method is used to speed up the iterative convergence rate. Signal c A and c B The signals are obtained after being modulated by the BPSK modulator s...

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Abstract

The invention relates to the technical field of wireless communication, specifically relates to a communication method based on LDLCs (Low Density Lattice Code) and physical layer network coding. The communication method aims at further improving the performance of a wireless communication system, improving the network throughput of the communication system, reducing the bit error rate of the communication system and improving the transmission capacity in an additive white gaussian noise channel. According to the communication method provided by the invention, through carrying out LDLC coding to the source node signals at a first time slot, carrying out LDLC decoding and physical layer network coding to mixed signals at a second time slot and broadcasting, finally, each source node is reduced and the opposite side node signals are obtained, thus finishing information interaction.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a communication method based on LDLC and physical layer network coding. 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] In order to im...

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Application Information

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IPC IPC(8): H04L1/00H04W28/02H04B7/155
CPCH04B7/15592H04L1/0063H04L1/0076H04W28/0268Y02D30/70
Inventor 胡永江袁全盛王长龙赵伟策
Owner PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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