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Space diversity method for physical layer network coding in communication system

A technology of network coding and communication system, applied in the field of wireless communication

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

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Problems solved by technology

However, there is no relevant report on using multi-antenna relay to provide a dedicated diversity scheme for physical layer network coding

Method used

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  • Space diversity method for physical layer network coding in communication system
  • Space diversity method for physical layer network coding in communication system
  • Space diversity method for physical layer network coding in communication system

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Embodiment Construction

[0026] The space diversity method for the physical layer network coding in the communication system proposed by the present invention, its flow chart is as follows image 3 shown, including the following steps:

[0027] (1) It is assumed that there are two single-antenna users performing full-rate interactive communication, and M distributed relay station antennas are set between the two single-antenna users to form a communication network. Such as figure 1 As shown, the single-antenna users S_1 and S_2 selected for information exchange and the half-duplex relay station R composed of two distributed antennas together form a communication network, M=3.

[0028] (2) Two single-antenna users in the communication network send training data to the relay station respectively, and the relay station estimates the channel information between the antenna of the relay station and each user antenna according to the received training data, and obtains the channel information between the a...

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Abstract

The invention relates to a space diversity method for physical layer network coding in a communication system, and belongs to the technical field of wireless communication. The method comprises the following steps of: arranging a plurality of distributed relay station antennas between two single antenna users, sending data to a relay station by a user, estimating channel information between the relay station and a user antenna by the relay station, acquiring a channel matrix, selecting a binary phase shift keying modulation mode by the user, sending interactive information among the users to the relay station, performing combined detection on the received superposed signals by the relay station to acquire network coding symbols, selecting an antenna set, performing space-time coding on the network coding symbols, then sending the coded network coding symbols to the user, performing space-time decoding on the space-time coded symbols by the user, and decoding the estimation values of the network coding symbols according to the interactive information to acquire data information of an opposite user. The method improves the frequency spectrum utilization rate and energy utilization efficiency of a bidirectional relay network and remarkably improves the bidirectional communication reliability of the users.

Description

technical field [0001] The invention relates to a space diversity method for physical layer network coding in a communication system, belonging 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 inform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06
Inventor 粟欣高晖吴佳张长曾捷程青燕
Owner TSINGHUA UNIV
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