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Communication method based on SC-FDE (single carrier frequency domain equalization) and physical layer network coding

A SC-FDE, network coding technology, applied in the field of wireless communication, can solve the problem of carrier deviation sensitivity, not suitable for long-distance communication, etc., to achieve good performance, improve network throughput, and reduce sensitivity.

Inactive Publication Date: 2016-05-25
PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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Problems solved by technology

Although OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) technology can allow two source nodes to be asynchronous within a certain range, the peak-to-average power ratio (PAPR) of OFDM technology is relatively high, and the carrier deviation More sensitive, not suitable for long-distance communication

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  • Communication method based on SC-FDE (single carrier frequency domain equalization) and physical layer network coding
  • Communication method based on SC-FDE (single carrier frequency domain equalization) and physical layer network coding
  • Communication method based on SC-FDE (single carrier frequency domain equalization) and physical layer network coding

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing.

[0020] refer to figure 1 , the communication model of the embodiment is used to illustrate the principle of joint design of SC-FDE and physical layer network coding, and the specific steps of the communication method of the embodiment are as follows:

[0021] Step 1: Source node A and source node B respectively generate signals in the first time slot S A and signal S B ,Signal S A and signal S B The baseband signal is formed by constellation mapping; the serial baseband signal is divided into a certain number of parallel signals; the pilot sequence and the cyclic prefix are inserted; the pseudo-random sequence ts and the unique word sequence UW are inserted after parallel-to-serial conversion to form a signal frame X A with X B (The frame structure of the signal frame is as follows figure 2 shown), the signal frame X A with X B Modulate to radio frequency a...

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Abstract

The invention relates to the technical field of wireless communication, and particularly relates to a communication method based on SC-FDE (single carrier frequency domain equalization) and physical layer network coding. The invention aims to further improve performance of a wireless communication system, improve network throughput of the system, reduce a bit error rate of the system and achieve remote communication of asynchronous signals. According to the communication method disclosed by the invention, by applying an SC-FDE technology in processes of a first time slot and a second time slot of a two-way relay communication system, signals sent by two source nodes are subjected to time synchronization, two source node signals which are asynchronous in time are used as signals which reaches by different paths, and as long as an asynchronous range is in a range of a cyclic prefix, recovery can be carried out by frequency domain equalization, so that the bit error rate of the system is reduced; and in the process of the second time slot, a physical layer network coding technology is applied to improve network throughput of the communication system.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a communication method based on SC-FDE and physical layer network coding. Background technique [0002] In the two-way relay communication system, the use of physical layer network coding technology can effectively improve the throughput of the network. But the two source nodes cannot guarantee that the signals sent can reach the relay node at the same time. The mixed signal received by the relay node is asynchronous in sign and phase. Although OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) technology can allow two source nodes to be asynchronous within a certain range, the peak-to-average power ratio (PAPR) of OFDM technology is relatively high, and the carrier deviation More sensitive, not suitable for long-distance communication. Using SC-FDE (Single Carrier Frequency Domain Equalization) technology, the two source node signals that ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L25/02H04L25/03
CPCH04L1/0001H04L1/0009H04L25/0202H04L25/03961
Inventor 胡永江王长龙赵伟策袁全盛
Owner PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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