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Physical layer network coding-based joint antenna selection space multiplexing method

A network coding and antenna selection technology, applied in the directions of space transmit diversity, diversity/multi-antenna systems, advanced technology, etc., which can solve the problems of weak anti-channel fading ability of the system and inability to utilize multi-day receiver diversity gain.

Inactive Publication Date: 2011-08-03
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

Practical space-division multiplexing methods usually use linear receivers; although linear receivers have relatively simple implementation complexity, space-division multiplexing systems based on linear receivers often cannot take advantage of the potential diversity gain of multi-day receivers. Make the system weak against channel fading

Method used

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  • Physical layer network coding-based joint antenna selection space multiplexing method
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  • Physical layer network coding-based joint antenna selection space multiplexing method

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Embodiment Construction

[0033] The joint antenna selection space multiplexing method based on physical layer network coding proposed by the present invention has a flow chart as shown in image 3 shown, including the following steps:

[0034] (1) Assuming two users performing full-rate interactive communication, each user has N antennas, and a relay station with M antennas is set between the two users, and the users and the relay station form a communication network, such as figure 1 As shown, the selected users S_1 and S_2 for information exchange and the half-duplex relay station R composed of distributed antennas together form a communication network.

[0035](2) The relay station in the communication network sends training data to two users respectively, and the user estimates the channel information between the antenna of the user and the antenna of the relay station according to the received training data, and then obtains the channel matrix between the antenna of the relay station and the user...

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Abstract

The invention relates to a physical layer network coding-based joint antenna selection space multiplexing method, and belongs to the technical field of wireless communication. The method comprises the following steps that: a relay selects an antenna set which participates in communication; two users which perform bidirectional communication transmit pre-coded information to the relay at the same time; the relay performs physical layer network coding maximum likelihood detection on superimposed signals from different users to directly obtain network coding symbols; the relay broadcasts the network coding symbols back to the users; and the users decode the pre-coded information and extract the information of the other user by utilizing self-information. By the method, the frequency spectrumutilization efficiency and the energy utilization efficiency of a bidirectional delay network are improved effectively, multi-stream high-speed transmission is realized, and relay decoding complexityis reduced.

Description

technical field [0001] The invention relates to a joint antenna selection space multiplexing method based on physical layer network coding, which belongs to the technical field of wireless communication. Background technique [0002] Two-way communication is a common means of communication. For example, real-time file interaction between users, video calls and other services, and special monitoring systems all require reliable two-way communication. Due to the geographical distance or the poor quality of the direct transmission channel, users who expect to achieve two-way communication cannot form their own network to achieve reliable communication. At this time, relays can be used to assist in completing two-way communication. Physical layer network coding, using the broadcast and superposition characteristics of wireless signal transmission and advanced signal detection methods, can provide high-speed and reliable information transmission for these user pairs who expect to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08H04L1/06
CPCY02D30/70
Inventor 曾捷粟欣高晖吴佳
Owner TSINGHUA UNIV
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