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Spatial multiplexing method for network coding of physical layer

A technology of network coding and spatial multiplexing, which is applied in the field of wireless communication, can solve problems such as no reports, achieve the effect of reducing complexity, improving spectrum utilization rate and energy utilization efficiency, and realizing multi-stream high-speed transmission

Inactive Publication Date: 2011-05-11
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, for relay-assisted networks, relays and user terminals usually have multiple antennas, and spatial multiplexing methods for physical layer network coding have not been reported so far

Method used

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  • Spatial multiplexing method for network coding of physical layer
  • Spatial multiplexing method for network coding of physical layer
  • Spatial multiplexing method for network coding of physical layer

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Embodiment Construction

[0023] In the spatial multiplexing method for physical layer network coding proposed by the present invention, the signal transmission process in signal transmission is as follows figure 2 As shown, the signal reception during signal transmission is as follows image 3 As shown, it specifically includes the following steps:

[0024] (1) Assuming two users performing full-rate interactive communication, each user has M antennas, and M distributed relay station antennas are set between the two users to form a communication network; figure 1 As shown, users S_1 and S_2 selected for information exchange and a half-duplex relay station R composed of distributed antennas together form a communication network, and both users and relay stations have M antennas.

[0025] (2) The relay station in the communication network sends training data to two users respectively, and the user estimates the channel information between the user antenna and the relay station antenna according to the...

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Abstract

The invention relates to a spatial multiplexing method for network coding of a physical layer, belonging to the technical field of wireless communication. A signal transmission method of the spatial multiplexing method comprises two transmission phases: a multiple-access (MAC) stage and a broadcast (BC) stage. In the MAC stage, two users hoping to carry out two-way communication transmit precodedinformation to a repeater simultaneously, the repeater carries out maximum likelihood detection of network coding of the physical layer on superposed signals from different users so as to further obtain network coding symbols directly; and in the BC stage, the network coding symbols are broadcast back to the users by the repeater, and the users extract information of another user by utilizing self information after decoding precoded signals. The method effectively improves frequency spectrum utilization ratio and energy utilization efficiency of a two-way repeating network, realizes multithread high-speed transmission and reduces the decoding complexity of the repeater.

Description

technical field [0001] The invention relates to a space multiplexing method for 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. Wireless 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 exchange information. At the same...

Claims

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Application Information

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IPC IPC(8): H04L1/06
Inventor 粟欣高晖王海军吴佳张长曾捷
Owner TSINGHUA UNIV
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